Control valve

Claim 2

A sectional control valve comprising one or more control sections sandwiched flatwise in a bank between end sections, one of which provides an inlet section having inlet and exhaust passages and a bypass through which supply fluid entering the inlet passage can flow in bypass relation to supply passage means in the control sections depending upon the position of an axially movable pressure compensating plunger which regulates flow of supply fluid through the bypass in accordance with variations in the pressure differential across an orifice through which nonbypassed pressure fluid is caused to flow through the supply passage means to a service passage in one of the control sections whenever a valve element in said control section is moved to a working position in the bore in which the valve element operates, characterized by the following: A. said compensating plunger having a pair of surfaces facing in opposite directions and upon which fluid pressure forces can be imposed to effect movement of the plunger in one direction or the other for regulation of flow through the bypass; B. means for subjecting one of said surfaces to the fluid pressure obtaining in the inlet passage; C. and means for subjecting the other of said surfaces to the fluid pressure obtaining in the service passage, comprising 2. a control passage extending from the inlet section to said one control section and opening to one face of the latter at its junction with an adjoining section, 2. a groove in the face of one of said adjoining sections at said junction therebetween, to which said control passage opens, 3. and a hole in said one control section opening to said groove and adapted to be communicated with said service passage by the valve element in said working position thereof.

Claim 3

a groove in the face of one of said adjoining sections at said junction therebetween, to which said control passage opens,

Claim 4

a groove in the face of one of said adjoining sections at said junction therebetween, to which said control passage opens,

Claim 5

a control passage extending from the inlet section to said one control section and opening to one face of the latter at its junction with an adjoining section,

Claim 6

a control passage extending from the inlet section to said one control section and opening to one face of the latter at its junction with an adjoining section,

Claim 7

a bore with which all of said passages communicate,

Claim 8

a bore with which all of said passages communicate,

Claim 9

a hole in said one control section communicable with said service passage by the valve element in said working position thereof,

Claim 10

a hole in said one control section communicable with said service passage by the valve element in said working position thereof,

Claim 11

communicating control passages in said control and inlet sections opening to one face of said one control section at its junction with an adjoining section,

Claim 12

communicating control passages in said control and inlet sections opening to one face of said one control section at its junction with an adjoining section,

Claim 13

A sectional control valve comprising one or more control sections sandwiched flatwise in a bank between end sections, one of which provides an inlet section having inlet and exhaust passages and a bypass through which supply fluid entering the inlet passage can flow to the exhaust passage depending upon the position of an axially movable pressure compensating plunger which regulates flow of supply fluid through the bypass in accordance with variations in the pressure differential across an orifice through which non-bypassed pressure fluid is caused to flow through supply passage means to a service passage in one of the control sections whenever a valve element said control section is moved to a working position in the bore in which the valve element operates, characterized by the following: A. said pressure compensating plunger regulating flow through the bypass in accordance with change in the pressure of fluid in the service passage when said valve element is in its said working position, and having a pair of surfaces which face in opposite directions and upon which fluid pressure forces can be imposed to effect movement of the plunger in one direction or the other for regulation of flow through the bypass; B. means for subjecting one of said plunger surfaces to the fluid pressure obtaining in the inlet passage; C. and passage means by which said other plunger surface can be subjected to the fluid pressure obtaining in said service passage, comprising

Claim 14

A sectional control valve comprising one or more control sections sandwiched flatwise in a bank between end sections, one of which provides an inlet section having inlet and exhaust passages and a bypass through which supply fluid entering the inlet passage can flow to the exhaust passage depending upon the position of an axially movable pressure compensating plunger which regulates flow of supply fluid through the bypass in accordance with variations in the pressure differential across an orifice through which non-bypassed pressure fluid is caused to flow through supply passage means to a service passage in one of the control sections whenever a valve element said control section is moved to a working position in the bore in which the valve element operates, characterized by the following: A. said pressure compensating plunger regulating flow through the bypass in accordance with change in the pressure of fluid in the service passage when said valve element is in its said working position, and having a pair of surfaces which face in opposite directions and upon which fluid pressure forces can be imposed to effect movement of the plunger in one direction or the other for regulation of flow through the bypass; B. means for subjecting one of said plunger surfaces to the fluid pressure obtaining in the inlet passage; C. and passage means by which said other plunger surface can be subjected to the fluid pressure obtaining in said service passage, comprising

Claim 15

and a groove in said one face of the housing, to which both the control passage and said hole open.

Claim 16

and a groove in said one face of the housing, to which both the control passage and said hole open.

Claim 17

and a hole in said one control section opening to said groove and adapted to be communicated with said service passage by the valve element in said working position thereof.

Claim 18

and a hole in said one control section opening to said groove and adapted to be communicated with said service passage by the valve element in said working position thereof.

Claim 19

and a valve element shiftable axially in the bore between first and second working positions to selectively communicate the service passage with either the supply passage or the return passage; C. said passage means including a bypass through which pressure fluid entering the inlet section can bypass the fluid supply passage portions downstream thereof; D. a pressure compensating valve mechanism in the inlet section, to govern said bypass and operable in response to difference in fluid pressure obtaining in the supply passage and in a service passage which is in communication with the supply passage; E. means for subjecting said pressure compensating valve mechanism to the fluid pressure obtaining at the supply passage; F. and passage means including a groove in the face of one of said sections at each junction between a control section and an adjoining section, for subjecting said pressure compensating valve mechanism to the fluid pressure obtaining in a service passage which is in communication with the supply passage.

Claim 20

and a valve element shiftable axially in the bore between first and second working positions to selectively communicate the service passage with either the supply passage or the return passage; C. said passage means including a bypass through which pressure fluid entering the inlet section can bypass the fluid supply passage portions downstream thereof; D. a pressure compensating valve mechanism in the inlet section, to govern said bypass and operable in response to difference in fluid pressure obtaining in the supply passage and in a service passage which is in communication with the supply passage; E. means for subjecting said pressure compensating valve mechanism to the fluid pressure obtaining at the supply passage; F. and passage means including a groove in the face of one of said sections at each junction between a control section and an adjoining section, for subjecting said pressure compensating valve mechanism to the fluid pressure obtaining in a service passage which is in communication with the supply passage.

Claim 21

The sectional valve of claim 1, further characterized by the following: A. there being return passage means in the bank communicating with the exhaust passage; B. said control section having a pair of service passages each of which is in turn communicated with the supply passage means while the other is communicated with the return passage means by the valve element in consequence of movement thereof from said one working position to a second working position; C. and said control section having one hole for each service passage opening to such groove and communicable therewith by the valve element when the element is in a working position communicating the associated service passage with the supply passage means.

Claim 22

and a groove in the face of one of said adjoining sections at the junction therebetween to communicate said hole with said registering control passages.

Claim 23

and a groove in the face of one of said adjoining sections at the junction therebetween to communicate said hole with said registering control passages.

Claim 24

The sectional valve of claim 3, further characterized by check valve means in said holes, arranged to open to permit flow of fluid to said groove.

Claim 25

The sectional valve of claim 3, further characterized by each of said check valves being accommodated in a counterbore which opens to said groove.

Claim 26

A sectional control valve having end sections and at least one control section confined therebetween to provide a bank in which opposite faces of the sections are in flatwise mating engagement with similar flat faces on adjoining sections, characterized by the following: A. one of said end sections providing an inlet section having therein passage means Comprising fluid supply and return passages that extend continuously through each control section; B. each control section having

Claim 27

A sectional control valve having end sections and at least one control section confined therebetween to provide a bank in which opposite faces of the sections are in flatwise mating engagement with similar flat faces on adjoining sections, characterized by the following: A. one of said end sections providing an inlet section having therein passage means Comprising fluid supply and return passages that extend continuously through each control section; B. each control section having

Claim 28

A control section for a pressure compensated stacked control valve, which control section has a housing with opposite flat faces, a service passage through which fluid can be supplied to and exhausted from a fluid motor, carryover passages which open to both of said faces and which are adapted to register with corresponding passages in adjoining sections of a stack thereof, said carry-over passages providing pressure fluid supply and return passages, a bore which is intersected by said passages, and an elongated valve element slidable axially in the bore from a neutral position to a first working position to communicate the service and supply passages and to a second working position to communicate the service and return passages, said control section being characterized by the following: A. said carryover passages including a control passage; B. and cooperating means on the housing and on the valve element rendered operative in said first working position of the element to effect communication between the control and service passages, said cooperating means comprising

Claim 29

A control section for a pressure compensated stacked control valve, which control section has a housing with opposite flat faces, a service passage through which fluid can be supplied to and exhausted from a fluid motor, carryover passages which open to both of said faces and which are adapted to register with corresponding passages in adjoining sections of a stack thereof, said carry-over passages providing pressure fluid supply and return passages, a bore which is intersected by said passages, and an elongated valve element slidable axially in the bore from a neutral position to a first working position to communicate the service and supply passages and to a second working position to communicate the service and return passages, said control section being characterized by the following: A. said carryover passages including a control passage; B. and cooperating means on the housing and on the valve element rendered operative in said first working position of the element to effect communication between the control and service passages, said cooperating means comprising

Claim 30

The control section of claim 7, further characterized by the following: A. said fluid supply passage having a mouth which opens to said one face of the housing at a location alongside of said groove; B. and a circular groove in said face of the housing, encircling the first designated groove as well as the mouth of the fluid supply passage, to receive and hold a sealing ring in sealing engagement with the face of an adjoining section of a stack thereof.

Claim 31

The control section of claim 7, further characterized by the following: A. there being a pair of said service passages for connection with the opposite sides of a reversible fluid motor, and communicating with the bore at spaced zones lying at axially opposite sides of an intermediate zone at which the fluid supply passage joins with the bore; B. there being a pair of said holes one for each service passage and opening to said first designated groove and to the bore at a location between its associated first designated zone and said intermediate zone; C. and the valve element being movable to said first and second working positions to in turn communicate each service passage with its associated hole and with the fluid supply passage, and to communicate the non-selected service passage with the fluid return passage.

Claim 32

In a control valve having an inlet and a valve member movable in one direction in a bore in the body of the valve from a neutral position to a partial operating position providing restricted communication between a service passage and an inlet connected supply passage through a throttle port that meters flow of supply fluid to the service passage, the combination of: A. a pressure compensating valve mechanism having a bypass through which excess supply fluid entering the inlet can flow to a return port, and having a plunger to regulate flow through the bypass in accordance with differences in inlet and service passage pressure to thereby maintain said metered flow to the service passage despite change in fluid pressure therein; B. means for effecting actuation of the plunger to a position allowing partial flow through the bypass in response to the reduced pressure of fluid sensed at a point downstream from the throttle port, at which service passage pressure obtains; C. and means rendered operative in consequence of movement of the valve member in said direction to a full operating position, for effecting actuation of the plunger to a bypass closing position in response to the higher pressure of fluid sensed at a point upstream from the throttle port, at which inlet pressure obtains.

Claim 33

In a control valve having an inlet and a valve member movable in one direction in a bore in the body of the valve from a neutral position to a partial operating position providing restricted communication between a service passage and an inlet connected supply passage through a throttle port that meters flow of supply fluid to the service passage, the combination of: A. a pressure compensating valve mechanism having a bypass through which excess supply fluid entering the inlet can flow to a return port, and having a plunger to regulate flow through the bypass in accordance with differences in inlet and service passage pressure to thereby maintain said metered flow to the service passage despite change in fluid pressure therein; B. means for effecting actuation of the plunger to a position allowing partial flow through the bypass in response to the reduced pressure of fluid sensed at a point downstream from the throttle port, at which service passage pressure obtains; C. and means rendered operative in consequence of movement of the valve member in said direction to a full operating position, for effecting actuation of the plunger to a bypass closing position in response to the higher pressure of fluid sensed at a point upstream from the throttle port, at which inlet pressure obtains.

Claim 34

The control valve of claim 10, further characterized by: A. said valve member being movable to partial operating positions at opposite sides of neutral to communicate either of a pair of service passages with the return port and to restrictedly communicate the other service passage with the supply passage through a throttle port for said other service passage; B. and said means for effecting actuation of the compensating plunger to bypass closing position being rendered operative in consequence of movement of the valve member to a full operating position at either side of neutral.

Claim 35

A control valve having pressure fluid inlet and outlet means and a valve element to control communication of a service passage with fluid supply and return means, characterized by the following; A. means defining a feeder passage which is rendered effective by the valve element in one operating position thereof to communicate the service passage with the fluid supply means; B. a load check valve in one of said passages; C. means providing a port through which pressure fluid from the inlet means can flow in bypass relation to the fluid supply means; D. a pressure compensating valve mechanism having a fluid pressure actuatable plunger to control communication of the inlet means with the fluid supply means and with said bypass port; E. means for translating the pressure of fluid obtaining in the inlet means into force on said plunger tending to move it in one direction toward a position at which it closes off communication between the fluid supply means and the inlet means opens up communication between the latter and the bypass port; F. and means for translating the pressure of fluid obtaining in one of said passages into force on said plunger tending to move it in the opposite direction toward a position closing off communication between the bypass port and the inlet means and opening up communication between the latter and the fluid supply means.

Claim 36

A control valve having pressure fluid inlet and outlet means and a valve element to control communication of a service passage with fluid supply and return means, characterized by the following; A. means defining a feeder passage which is rendered effective by the valve element in one operating position thereof to communicate the service passage with the fluid supply means; B. a load check valve in one of said passages; C. means providing a port through which pressure fluid from the inlet means can flow in bypass relation to the fluid supply means; D. a pressure compensating valve mechanism having a fluid pressure actuatable plunger to control communication of the inlet means with the fluid supply means and with said bypass port; E. means for translating the pressure of fluid obtaining in the inlet means into force on said plunger tending to move it in one direction toward a position at which it closes off communication between the fluid supply means and the inlet means opens up communication between the latter and the bypass port; F. and means for translating the pressure of fluid obtaining in one of said passages into force on said plunger tending to move it in the opposite direction toward a position closing off communication between the bypass port and the inlet means and opening up communication between the latter and the fluid supply means.

Claim 37

In combination with the control valve of claim 12: A. another control valve having a pressure fluid inlet; B. and means communicating the pressure fluid inlet of said other control valve with said bypass port.

Claim 38

In combination with the control valve of claim 12: A. said bypass port having a mouth which opens to the exterior of the control valve; B. and a plug closing the mouth of said bypass port.

Claim 39

A control section for a stacked control valve comprising a body with opposite flat faces, a bore and an elongated valve element slidable endwise therein to a working position communicating service and supply passages which open to tHe bore at axially spaced apart first and second zones, respectively, characterized by means in the body providing for detection of the pressure of fluid flowing to the service passage from the supply passage and providing for imposition of said pressure upon mechanism in another section of a sectional control valve, comprising: A. a control passage normal to said body faces, all portions of which are spaced from the bore and from the supply passage; B. a passageway which is parallel to said control passage and one end of which opens to the bore at a third zone closely adjacent to said second zone, between it and said first zone; C. means providing a recess in the exterior of the valve element into which fluid leaving the supply passage initially flows on its way to the service passage in said working position of the valve element, said recess providing communication between the supply passage and said one end of said passageway; D. and passage defining means at one face of the body communicating the other end of said passageway with the control passage.

Claim 40

A control section for a stacked control valve comprising a body with opposite flat faces, a bore and an elongated valve element slidable endwise therein to a working position communicating service and supply passages which open to tHe bore at axially spaced apart first and second zones, respectively, characterized by means in the body providing for detection of the pressure of fluid flowing to the service passage from the supply passage and providing for imposition of said pressure upon mechanism in another section of a sectional control valve, comprising: A. a control passage normal to said body faces, all portions of which are spaced from the bore and from the supply passage; B. a passageway which is parallel to said control passage and one end of which opens to the bore at a third zone closely adjacent to said second zone, between it and said first zone; C. means providing a recess in the exterior of the valve element into which fluid leaving the supply passage initially flows on its way to the service passage in said working position of the valve element, said recess providing communication between the supply passage and said one end of said passageway; D. and passage defining means at one face of the body communicating the other end of said passageway with the control passage.

Claim 41

A control valve having a body with pressure fluid inlet and outlet means and a valve element to control communication of a service passage with fluid supply and return means, characterized by the following: A. a pressure compensating valve mechanism having a fluid pressure actuatable plunger which is movable back and forth in opposite directions to control fluid flow from the inlet means to the fluid supply means; B. means providing a feeder passage which is rendered effective by the valve element in one operating position thereof to communicate the service passage with the fluid supply means; C. the valve body having a pair of mating surfaces which are normally maintained in intimate engagement with one another; D. and means for translating the pressure of fluid in one of said passages into force on the plunger tending to move it in the direction to increase fluid flow to the fluid supply means, comprising a passageway which is in part provided by a groove in one of said mating surfaces.

Claim 42

A control valve having a body with pressure fluid inlet and outlet means and a valve element to control communication of a service passage with fluid supply and return means, characterized by the following: A. a pressure compensating valve mechanism having a fluid pressure actuatable plunger which is movable back and forth in opposite directions to control fluid flow from the inlet means to the fluid supply means; B. means providing a feeder passage which is rendered effective by the valve element in one operating position thereof to communicate the service passage with the fluid supply means; C. the valve body having a pair of mating surfaces which are normally maintained in intimate engagement with one another; D. and means for translating the pressure of fluid in one of said passages into force on the plunger tending to move it in the direction to increase fluid flow to the fluid supply means, comprising a passageway which is in part provided by a groove in one of said mating surfaces.

Claim 43

In a control section for a stacked control valve having a carryover type supply passage extending therethrough from one face thereof to the other and intersecting a bore in which a valve element is slidable axially from a neutral position, blocking flow of fluid from the supply passage to a service passage, to first and second working positions respectively communicating the service passage with the supply passage or with a return passage via an axial bore in the valve element, means effective in said first working position of the valve element to provide for imposing the pressure of supply fluid flowing to the service passage upon mechanism in another part of the control valve, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means connecting with the control passage and having one end opening to the bore at a first zone spaced from a second zone at which the supply passage opens to the bore, the other end of said passageway opening to one face of the section through a counterbore which defines an annular check valve seat; C. and means providing a recess in the exterior of the valve element of a size to span the space between said zones and conduct pressure fluid directly to said one end of said passage means from the supply passage in said first working position of the valve element.

Claim 44

In a control section for a stacked control valve having a carryover type supply passage extending therethrough from one face thereof to the other and intersecting a bore in which a valve element is slidable axially from a neutral position, blocking flow of fluid from the supply passage to a service passage, to first and second working positions respectively communicating the service passage with the supply passage or with a return passage via an axial bore in the valve element, means effective in said first working position of the valve element to provide for imposing the pressure of supply fluid flowing to the service passage upon mechanism in another part of the control valve, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means connecting with the control passage and having one end opening to the bore at a first zone spaced from a second zone at which the supply passage opens to the bore, the other end of said passageway opening to one face of the section through a counterbore which defines an annular check valve seat; C. and means providing a recess in the exterior of the valve element of a size to span the space between said zones and conduct pressure fluid directly to said one end of said passage means from the supply passage in said first working position of the valve element.

Claim 45

The control section of claim 17, wherein said passage means connects with the control passage through a groove in one face of the section, opening to said counterbore.

Claim 46

In a control section for a stacked control valve having a supply passage which opens to opposite faces of the section and intersects a bore in which a valve element is slidable axially to first and second working positions respectivEly communicating a service passage with the supply passage or with a return passage, means for imposing a fluid pressure force upon mechanism in another section of a stacked control valve containing said control section, of a value substantially corresponding to that of supply fluid in the service passage in said first working position of the valve element, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means comprising a signal passage opening to the bore at a zone closely adjacent to the supply passage, and a groove in one of said faces of the section connecting the signal passage with the control passage; C. and means on the valve element providing a recess in its exterior through which pressure fluid leaving the supply passage flows on its way to the service passage and through which recess such supply fluid also enters the signal passage in said first working position of the valve element.

Claim 47

In a control section for a stacked control valve having a supply passage which opens to opposite faces of the section and intersects a bore in which a valve element is slidable axially to first and second working positions respectivEly communicating a service passage with the supply passage or with a return passage, means for imposing a fluid pressure force upon mechanism in another section of a stacked control valve containing said control section, of a value substantially corresponding to that of supply fluid in the service passage in said first working position of the valve element, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means comprising a signal passage opening to the bore at a zone closely adjacent to the supply passage, and a groove in one of said faces of the section connecting the signal passage with the control passage; C. and means on the valve element providing a recess in its exterior through which pressure fluid leaving the supply passage flows on its way to the service passage and through which recess such supply fluid also enters the signal passage in said first working position of the valve element.

Claim 48

A control valve comprising a body with a pair of bores and an elongated valve element slidable endwise in each bore to a first working position communicating service and supply passages which open to its bore at axially spaced apart first and second zones, respectively, characterized by means in the body providing for detection of the pressure of fluid flowing to either service passage from the supply passage and providing for imposition of said pressure upon pressure compensating mechanism in another portion of the control valve, comprising: A. a control passage all portions of which are spaced from said bores and from the supply passage; B. a passageway for each bore, one end of which opens thereto at a third zone closely adjacent to said second zone and between it and said first zone; C. means providing a recess in the exterior of each valve element into which fluid leaving the supply passage initially flows on its way to the service passage governed by said value element in said working position thereof, said recess then providing communication between the supply passage and said one end of the associated passageway; D. passage defining means spaced a distance from each bore and communicating the other end of the associated passageway with the control passage; E. and a pair of check valves, one associated with each of said passageways, to prevent flow of fluid thereto from the control passage.

Claim 49

A control valve comprising a body with a pair of bores and an elongated valve element slidable endwise in each bore to a first working position communicating service and supply passages which open to its bore at axially spaced apart first and second zones, respectively, characterized by means in the body providing for detection of the pressure of fluid flowing to either service passage from the supply passage and providing for imposition of said pressure upon pressure compensating mechanism in another portion of the control valve, comprising: A. a control passage all portions of which are spaced from said bores and from the supply passage; B. a passageway for each bore, one end of which opens thereto at a third zone closely adjacent to said second zone and between it and said first zone; C. means providing a recess in the exterior of each valve element into which fluid leaving the supply passage initially flows on its way to the service passage governed by said value element in said working position thereof, said recess then providing communication between the supply passage and said one end of the associated passageway; D. passage defining means spaced a distance from each bore and communicating the other end of the associated passageway with the control passage; E. and a pair of check valves, one associated with each of said passageways, to prevent flow of fluid thereto from the control passage.

Claim 50

The control valve of claim 20, wherein each valve element communicates its associated service passage with an exhaust passage in a second working position and is further characterized by: A. a hollow portion providing an internal passage through which pressure fluid flows from the supply passage to its associated service passage in said first working position of the valve element; B. two axially spaced holes in the wall of said hollow portion of the valve element, one being closer to the supply passage and serving to communicate the latter with said internal passage in said first working position of the valve element and the other hole communicating said internal passage with said one end of said passageway in said first working position of the valve element; C. and said other hole being communicable with the service passage in the second working position of the valve element, to pass return fluid from the service passage to the exhaust passage.

Claim 51

A control valve comprising a pair of valve elements each movable in a bore to a working position communicating an associated service passage with an inlet passage via a supply passage serially connecting with said bores, and a single pressure compensating valve mechanism having a fluid pressure responsive valve plunger to control communication of a pressure fluid inlet with said supply passage and with a bypass through which inlet fluid can flow in bypass relation to the supply passage in an Amount depending upon variations in the pressure differential between inlet fluid and in either service passage communicated therewith, characterized by: A. means by which the pressure of inlet fluid is translated into a force on the plunger tending to move the same in the bypass opening direction; B. means by which the pressure of fluid at either service passage is translated into an opposing force on the plunger tending to move the same in the bypass closing direction; C. and means on the upstream valve element for blocking the supply passage at the bore containing said upstream valve element whenever the latter is moved to a full working position substantially unrestrictedly diverting pressure fluid from the supply passage to its associated service passage.

Claim 52

A control valve comprising a pair of valve elements each movable in a bore to a working position communicating an associated service passage with an inlet passage via a supply passage serially connecting with said bores, and a single pressure compensating valve mechanism having a fluid pressure responsive valve plunger to control communication of a pressure fluid inlet with said supply passage and with a bypass through which inlet fluid can flow in bypass relation to the supply passage in an Amount depending upon variations in the pressure differential between inlet fluid and in either service passage communicated therewith, characterized by: A. means by which the pressure of inlet fluid is translated into a force on the plunger tending to move the same in the bypass opening direction; B. means by which the pressure of fluid at either service passage is translated into an opposing force on the plunger tending to move the same in the bypass closing direction; C. and means on the upstream valve element for blocking the supply passage at the bore containing said upstream valve element whenever the latter is moved to a full working position substantially unrestrictedly diverting pressure fluid from the supply passage to its associated service passage.

Claim 53

A control section for a stacked control valve comprising a body with a bore and an elongated valve element slidable endwise therein to a working position communicating service and supply passages which open to the bore at axially spaced apart first and second zones, respectively, characterized by means in the body providing for detection of the pressure of fluid flowing to the service passage from the supply passage and providing for imposition of said pressure upon mechanism in another section of a sectional control valve, comprising: A. a control passage all portions of which are spaced from the bore and from the supply passage; B. a passageway one end of which opens to the bore at a third zone closely adjacent to said second zone and between it and said first zone; C. means providing a recess in the exterior of the valve element into which fluid leaving the supply passage initially flows on its way to the service passage in said working position of the valve element, said recess providing communication between the supply passage and said one end of said passageway; D. passage defining means spaced a distance from the bore and communicating the other end of said passageway with the control passage; E. substantially flat opposite faces on the control section to which the supply passage and said control passage open; F. and said passage defining means comprising a groove in one of said faces, communicating the control passage with the other end of said passageway.

Claim 54

A control section for a stacked control valve comprising a body with a bore and an elongated valve element slidable endwise therein to a working position communicating service and supply passages which open to the bore at axially spaced apart first and second zones, respectively, characterized by means in the body providing for detection of the pressure of fluid flowing to the service passage from the supply passage and providing for imposition of said pressure upon mechanism in another section of a sectional control valve, comprising: A. a control passage all portions of which are spaced from the bore and from the supply passage; B. a passageway one end of which opens to the bore at a third zone closely adjacent to said second zone and between it and said first zone; C. means providing a recess in the exterior of the valve element into which fluid leaving the supply passage initially flows on its way to the service passage in said working position of the valve element, said recess providing communication between the supply passage and said one end of said passageway; D. passage defining means spaced a distance from the bore and communicating the other end of said passageway with the control passage; E. substantially flat opposite faces on the control section to which the supply passage and said control passage open; F. and said passage defining means comprising a groove in one of said faces, communicating the control passage with the other end of said passageway.

Claim 55

A control valve having a body with pressure fluid inlet and outlet means and a valve element to control communication of a service passage with fluid supply and return means, characterized by the following: A. a pressure compensating valve mechanism having a fluid pressure actuatable plunger which is movable back and forth in opposite directions to control fluid flow from the inlet means to the fluid supply means; B. means providing a feeder passage which is rendered effective by the valve element in one operating position thereof to communicate the service passage with the fluid supply means; C. the valve body having a pair of mating surfaces which are normally maintained in intimate engagement with one another; D. means for translating the pressure of fluid in one of said passages into force on the plunger tending to move it in the direction to increase fluid flow to the fluid supply means, comprising a passageway which is in part provided by a groove in one of said mating surfaces. E. and a load check valve in said feeder passage.

Claim 56

A control valve having a body with pressure fluid inlet and outlet means and a valve element to control communication of a service passage with fluid supply and return means, characterized by the following: A. a pressure compensating valve mechanism having a fluid pressure actuatable plunger which is movable back and forth in opposite directions to control fluid flow from the inlet means to the fluid supply means; B. means providing a feeder passage which is rendered effective by the valve element in one operating position thereof to communicate the service passage with the fluid supply means; C. the valve body having a pair of mating surfaces which are normally maintained in intimate engagement with one another; D. means for translating the pressure of fluid in one of said passages into force on the plunger tending to move it in the direction to increase fluid flow to the fluid supply means, comprising a passageway which is in part provided by a groove in one of said mating surfaces. E. and a load check valve in said feeder passage.

Claim 57

In a control section for a stacked control valve having a carryover type supply passage extending therethrough from one face thereof to the other and intersecting a bore in which a valve element is slidable axially from a neutral position blocking flow of fluid from the supply passage to a service passage, to first and second working positions respectively communicating the service passage with the supply passage or with a return passage via an axial bore in the valve element, means effective in said first working position of the valve element to provide for imposing the pressure of supply fluid flowing to the seRvice passage upon mechanism in another part of the control valve, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means connecting with the control passage and having one end opening to the bore at a first zone spaced from a second zone at which the supply passage opens to the bore; C. means providing a recess in the exterior of the valve element of a size to span the space between said zones and conduct pressure fluid directly to said one end of said passage means from the supply passage in said first working position of the valve element; D. and means on the valve element for interrupting fluid flow through the supply passage at the bore in said first working position of the valve element.

Claim 58

In a control section for a stacked control valve having a carryover type supply passage extending therethrough from one face thereof to the other and intersecting a bore in which a valve element is slidable axially from a neutral position blocking flow of fluid from the supply passage to a service passage, to first and second working positions respectively communicating the service passage with the supply passage or with a return passage via an axial bore in the valve element, means effective in said first working position of the valve element to provide for imposing the pressure of supply fluid flowing to the seRvice passage upon mechanism in another part of the control valve, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means connecting with the control passage and having one end opening to the bore at a first zone spaced from a second zone at which the supply passage opens to the bore; C. means providing a recess in the exterior of the valve element of a size to span the space between said zones and conduct pressure fluid directly to said one end of said passage means from the supply passage in said first working position of the valve element; D. and means on the valve element for interrupting fluid flow through the supply passage at the bore in said first working position of the valve element.

Claim 59

In a control section for a stacked control valve having a supply passage which opens to opposite faces of the section and intersects a bore in which a valve element is slidable axially to first and second working positions respectively communicating a service passage with the supply passage or with a return passage, means for imposing a fluid pressure force upon mechanism in another section of a stacked control valve containing said control section, of a value substantially corresponding to that of supply fluid in the service passage in said first working position of the valve element, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means comprising a signal passage opening to the bore at a zone closely adjacent to the supply passage, and a groove in one of said faces of the section connecting the signal passage with the control passage; C. means on the valve element providing a recess in its exterior through which pressure fluid leaving the supply passage flows on its way to the service passage and through which recess such supply fluid also enters the signal passage in said first working position of the valve element; D. and means on the valve element for interrupting fluid flow through the supply passage at the bore in said first working position of the valve element.

Claim 60

In a control section for a stacked control valve having a supply passage which opens to opposite faces of the section and intersects a bore in which a valve element is slidable axially to first and second working positions respectively communicating a service passage with the supply passage or with a return passage, means for imposing a fluid pressure force upon mechanism in another section of a stacked control valve containing said control section, of a value substantially corresponding to that of supply fluid in the service passage in said first working position of the valve element, comprising: A. a control passage in the section extending lengthwise of the supply passage and crosswise of the bore, and having all portions thereof spaced from the supply passage and from the bore; B. passage means comprising a signal passage opening to the bore at a zone closely adjacent to the supply passage, and a groove in one of said faces of the section connecting the signal passage with the control passage; C. means on the valve element providing a recess in its exterior through which pressure fluid leaving the supply passage flows on its way to the service passage and through which recess such supply fluid also enters the signal passage in said first working position of the valve element; D. and means on the valve element for interrupting fluid flow through the supply passage at the bore in said first working position of the valve element.

Claim 61

A control valve comprising a body with a bore and an elongated valve element slidable endwise therein to a first working position communicating service and supply passages which open to the bore at axially spaced first and second zones, respectively characterized by means in the body providing for detection of the pressure of fluid flowing to the service passage from the supply passage and providing for imposition of said pressure upon pressure compensating mechanism in another portion of the control valve, comprising: A. a control passage all portions of which are spaced from the bore and from the supply passage; B. a passageway, one end of which opens to the bore at a third zone closely adjacent to said second zone and between it and said first zone; C. means providing a recess in the exterior of the valve element into which fluid leaving the supply passage initially flows on its way to the service passage in said working position of the valve element, said recess then providing communication between the supply passage and said one end of said passageway; D. passage defining means spaced a distance from the bore and communicating the other end of said passageway with the control passage; E. said valve element communicating the service passage with an exhaust passage in a second working position and having a hollow portion providing an internal passage through which pressure fluid flows from the supply passage to the service passage in said first working position of the valve element; F. two axially spaced holes in the wall of said hollow portion of the valve element, one being closer to tHe supply passage and serving to communicate the latter with said internal passage in said first working position of the valve element and the other hole communicating said internal passage with said one end of said passageway in said first working position of the valve element, the other of said holes being communicable with the service passage in the second working position of the valve element, to pass return fluid from the service passage to the exhaust passage; G. and said holes having different diameters to effect metering of fluid flow from the supply passage to said internal passage at one rate and to effect metering of return fluid flow from the service passage to the exhaust passage at a different rate.

Claim 62

A control valve comprising a body with a bore and an elongated valve element slidable endwise therein to a first working position communicating service and supply passages which open to the bore at axially spaced first and second zones, respectively characterized by means in the body providing for detection of the pressure of fluid flowing to the service passage from the supply passage and providing for imposition of said pressure upon pressure compensating mechanism in another portion of the control valve, comprising: A. a control passage all portions of which are spaced from the bore and from the supply passage; B. a passageway, one end of which opens to the bore at a third zone closely adjacent to said second zone and between it and said first zone; C. means providing a recess in the exterior of the valve element into which fluid leaving the supply passage initially flows on its way to the service passage in said working position of the valve element, said recess then providing communication between the supply passage and said one end of said passageway; D. passage defining means spaced a distance from the bore and communicating the other end of said passageway with the control passage; E. said valve element communicating the service passage with an exhaust passage in a second working position and having a hollow portion providing an internal passage through which pressure fluid flows from the supply passage to the service passage in said first working position of the valve element; F. two axially spaced holes in the wall of said hollow portion of the valve element, one being closer to tHe supply passage and serving to communicate the latter with said internal passage in said first working position of the valve element and the other hole communicating said internal passage with said one end of said passageway in said first working position of the valve element, the other of said holes being communicable with the service passage in the second working position of the valve element, to pass return fluid from the service passage to the exhaust passage; G. and said holes having different diameters to effect metering of fluid flow from the supply passage to said internal passage at one rate and to effect metering of return fluid flow from the service passage to the exhaust passage at a different rate.