Fluid truck snubber

Claim 2

In a motion damping device, the combination comprising A. a casing, B. a tubular member within said casing, said member defining a working chamber and said member and casing conjointly defining a rEservoir, C. a piston rod slidably extending through the top of said casing into said working chamber, D. a piston head on said piston rod for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head, E. a compression coil spring within said compression chamber yieldably urging said piston rod and piston head upwardly to extend the same, F. hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir, G. unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to all movement of said piston head in either direction, H. means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic fluid pressure in said compression chamber as it decreases in volume, I. valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume, and J. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 3

a bolster, and

Claim 4

a bolster, and

Claim 5

The combination according to claim 1 wherein the unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between the compression and compensating chambers in response to all movement of the piston head in either direction comprises a series of openings extending through said piston head and circumferentially spaced thereabout.

Claim 6

a tubular member within said casing, said member defining a working chamber and said member and casing conjointly defining a reservoir,

Claim 7

a tubular member within said casing, said member defining a working chamber and said member and casing conjointly defining a reservoir,

Claim 8

a member within said casing defining a working chamber and conjointly with said casing defining a reservoir extEnding about said member,

Claim 9

a member within said casing defining a working chamber and conjointly with said casing defining a reservoir extEnding about said member,

Claim 10

a bolster, and

Claim 11

a bolster, and

Claim 12

a cylindrical member within the upright cylindrical section of said casing, said member defining a working chamber and said member and casing conjointly defining a reservoir,

Claim 13

a cylindrical member within the upright cylindrical section of said casing, said member defining a working chamber and said member and casing conjointly defining a reservoir,

Claim 14

a bolster, and

Claim 15

a bolster, and

Claim 16

an annulus seated on the bottom of the casing,

Claim 17

an annulus seated on the bottom of the casing,

Claim 18

a bolster, and

Claim 19

a bolster, and

Claim 20

a pair of compression coil spring groups each seated upon one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 21

a pair of compression coil spring groups each seated upon one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 22

a boss extending upwardly from the bottom of said casing and through said annulus,

Claim 23

a boss extending upwardly from the bottom of said casing and through said annulus,

Claim 24

a piston head for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head,

Claim 25

a piston head for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head,

Claim 26

compression coil spring groups each carried by one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 27

compression coil spring groups each carried by one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 28

compression coil spring groups each carried by one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 29

compression coil spring groups each carried by one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 30

a piston head operating in said working chamber and dividing the same into variable volume compression and compensating chambers,

Claim 31

a piston head operating in said working chamber and dividing the same into variable volume compression and compensating chambers,

Claim 32

a piston rod slidably extending through the top of said casing into said working chamber,

Claim 33

a piston rod slidably extending through the top of said casing into said working chamber,

Claim 34

The combination according to claim 1 wherein the tubular member providing a working chamber is seated upon the outer marginal area of an annulus which in turn is seated directly upon the bottom of the casing, the casing is provided with a boss extending upwardly from the bottom thereof through said annulus into the compression chamber, and the lower end portion of the compression coil spring within said compression chamber is operatively seated upon the top of said boss.

Claim 35

compression coil spring groups each carried by one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 36

compression coil spring groups each carried by one of said frames and supporting the associated end of said bolster, and C. unitary motion damping means each associated with one of said spring groups including

Claim 37

The combination according to claim 3 wherein the upper end portion of the compression coil spring within the compression chamber extends through the piston head and into the lower end portion of the piston rod.

Claim 38

a piston head on said piston rod for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head,

Claim 39

a piston head on said piston rod for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head,

Claim 40

a piston rod extending upwardly from said piston head and through the top of said casing,

Claim 41

a piston rod extending upwardly from said piston head and through the top of said casing,

Claim 42

a piston rod extending upwardly from said piston head and slidably through the top of said casing,

Claim 43

a piston rod extending upwardly from said piston head and slidably through the top of said casing,

Claim 44

an upright cylindrical member within said casing seated upon the outer marginal area of said annulus,

Claim 45

an upright cylindrical member within said casing seated upon the outer marginal area of said annulus,

Claim 46

closure means for the top of said casing including a piston rod slidably projected through said closure means and extending into the interior of said cylIndrical member,

Claim 47

closure means for the top of said casing including a piston rod slidably projected through said closure means and extending into the interior of said cylIndrical member,

Claim 48

a compression coil spring within said compression chamber yieldably urging said piston head and piston rod upwardly to extend the same,

Claim 49

a compression coil spring within said compression chamber yieldably urging said piston head and piston rod upwardly to extend the same,

Claim 50

spring means yieldably biasing said piston head upwardly to extend said piston rod,

Claim 51

spring means yieldably biasing said piston head upwardly to extend said piston rod,

Claim 52

a compression coil spring within said compression chamber yieldably urging said piston rod and piston head upwardly to extend the same,

Claim 53

a compression coil spring within said compression chamber yieldably urging said piston rod and piston head upwardly to extend the same,

Claim 54

The combination according to claim 1 wherein the tubular member providing a working chamber is seated upon the outer marginal area of an annulus which in turn is seated directly upon the bottom of the casing, the casing is provided with a boss extending upwardly from the bottom thereof through said annulus into the compression chamber, and said boss is bored and the undersurface of said annulus is grooved thereby to provide a passage for the flow of hydraulic fluid between the compression chamber and the reservoir.

Claim 55

The combination according to claim 5 wherein a series of openings circumferentially spaced about the annulus extend therethrough, said openings and the grooves in the undersurface of said annulus conjointly provide a passage for the flow of hydraulic fluid between the compression chamber and reservoir, and spring pressed valve means in said compression chamber provide for unidirectional flow of hydraulic fluid through said series of openings from said reservoir into said compression chamber.

Claim 56

hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir,

Claim 57

hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir,

Claim 58

hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir,

Claim 59

hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir,

Claim 60

a piston head in said cylindrical member carried by said piston rod, there being thus formed a variable volume compression chamber under said piston head, a variable volume compensating chamber over said piston head and a constant volume reservoir between said cylindrical member and casing,

Claim 61

a piston head in said cylindrical member carried by said piston rod, there being thus formed a variable volume compression chamber under said piston head, a variable volume compensating chamber over said piston head and a constant volume reservoir between said cylindrical member and casing,

Claim 62

hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir,

Claim 63

hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir,

Claim 64

In a motion damping device, The combination comprising A. an upright cylindrical casing closed at the bottom and open at the top, B. an annulus seated on the bottom of the casing, C. a boss extending upwardly from the bottom of said casing and through said annulus, D. an upright cylindrical member within said casing seated upon the outer marginal area of said annulus, E. closure means for the top of said casing including a piston rod slidably projected through said closure means and extending into the interior of said cylindrical member, F. a piston head in said cylindrical member carried by said piston rod, there being thus formed a variable volume compression chamber under said piston head, a variable volume compensating chamber over said piston head and a constant volume reservoir between said cylindrical member and casing, G. unvalved hydraulic fluid passages extending through said piston head and providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to movement of said piston head in either direction, H. a compression coil spring operatively seated upon said boss and extending upwardly therefrom through said piston head for being telescoped into the lower end portion of said piston rod, said spring being operative for urging said piston rod and piston head upwardly, thereby to extend the same, I. hydraulic fluid passage means establishing communication between said compression chamber and reservoir via a plurality of flow paths, J. means in one of said flow paths providing a fixed area orifice including spring pressed valve means responsive to hydraulic fluid pressure for converting said fixed area orifice into a variable area orifice, K. spring pressed valve means in said compression chamber operable for providing a unidirectional hydraulic fluid flow along the other of said flow paths, from said reservoir into said compression chamber, and L. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 65

In a motion damping device, The combination comprising A. an upright cylindrical casing closed at the bottom and open at the top, B. an annulus seated on the bottom of the casing, C. a boss extending upwardly from the bottom of said casing and through said annulus, D. an upright cylindrical member within said casing seated upon the outer marginal area of said annulus, E. closure means for the top of said casing including a piston rod slidably projected through said closure means and extending into the interior of said cylindrical member, F. a piston head in said cylindrical member carried by said piston rod, there being thus formed a variable volume compression chamber under said piston head, a variable volume compensating chamber over said piston head and a constant volume reservoir between said cylindrical member and casing, G. unvalved hydraulic fluid passages extending through said piston head and providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to movement of said piston head in either direction, H. a compression coil spring operatively seated upon said boss and extending upwardly therefrom through said piston head for being telescoped into the lower end portion of said piston rod, said spring being operative for urging said piston rod and piston head upwardly, thereby to extend the same, I. hydraulic fluid passage means establishing communication between said compression chamber and reservoir via a plurality of flow paths, J. means in one of said flow paths providing a fixed area orifice including spring pressed valve means responsive to hydraulic fluid pressure for converting said fixed area orifice into a variable area orifice, K. spring pressed valve means in said compression chamber operable for providing a unidirectional hydraulic fluid flow along the other of said flow paths, from said reservoir into said compression chamber, and L. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 66

hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir,

Claim 67

hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir,

Claim 68

unvalved hydraulic fluid passages extending through said piston head and providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to movement of said piston head in either direction,

Claim 69

unvalved hydraulic fluid passages extending through said piston head and providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to movement of said piston head in either direction,

Claim 70

means valved for passage of said fluid from said compression chamber to said reservoir when said piston head is retracted against the influence of said spring means and for passage of said fluid from said reservoir to said compression chamber when said piston head is extended by said spring means,

Claim 71

means valved for passage of said fluid from said compression chamber to said reservoir when said piston head is retracted against the influence of said spring means and for passage of said fluid from said reservoir to said compression chamber when said piston head is extended by said spring means,

Claim 72

unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to all movement of said piston head in either direction,

Claim 73

unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to all movement of said piston head in either direction,

Claim 74

means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic Fluid pressure in said compression chamber as it decreases in volume,

Claim 75

means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic Fluid pressure in said compression chamber as it decreases in volume,

Claim 76

In a railroad vehicle, the combination comprising A. a vehicle body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 77

In a railroad vehicle, the combination comprising A. a vehicle body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 78

means in said reservoir floating on the hydraulic fluid therein and arranged for separating the same from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said vehicle is turned upside down, and

Claim 79

means in said reservoir floating on the hydraulic fluid therein and arranged for separating the same from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said vehicle is turned upside down, and

Claim 80

unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and comPensating chambers in response to all movement of said piston head in either direction,

Claim 81

unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and comPensating chambers in response to all movement of said piston head in either direction,

Claim 82

a compression coil spring operatively seated upon said boss and extending upwardly therefrom through said piston head for being telescoped into the lower end portion of said piston rod, said spring being operative for urging said piston rod and piston head upwardly, thereby to extend the same,

Claim 83

a compression coil spring operatively seated upon said boss and extending upwardly therefrom through said piston head for being telescoped into the lower end portion of said piston rod, said spring being operative for urging said piston rod and piston head upwardly, thereby to extend the same,

Claim 84

hydraulic fluid passage means establishing communication between said compression chamber and reservoir via a plurality of flow paths,

Claim 85

hydraulic fluid passage means establishing communication between said compression chamber and reservoir via a plurality of flow paths,

Claim 86

The combination according to claim 8 wherein the unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between the compression and compensating chambers in response to all movement of the piston head in either direction comprises a series of openings extending through said piston head and circumferentially spaced thereabout.

Claim 87

valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume, and

Claim 88

valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume, and

Claim 89

means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic fluid pressure in said compression chamber as it decreases in volume,

Claim 90

means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic fluid pressure in said compression chamber as it decreases in volume,

Claim 91

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 92

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 93

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 94

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 95

valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume,

Claim 96

valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume,

Claim 97

The combination according to claim 8 wherein the tubular member providing a working chamber is seated upon the outer marginal area of an annulus which in turn is seated directly upon the bottom of the casing, the casing is provided with a boss extending upwardly from the bottom thereof through said annulus into the compression chamber, and the lower end portion of the compression coil spring within said compression chamber is operatively seated upon the top of said boss.

Claim 98

means in one of said flow paths providing a fixed area orifice including spring pressed valve means responsive to hydraulic fluid pressure for converting said fixed area orifice into a variable area orifice,

Claim 99

means in one of said flow paths providing a fixed area orifice including spring pressed valve means responsive to hydraulic fluid pressure for converting said fixed area orifice into a variable area orifice,

Claim 100

an annular piston concentrically disposed between the upright cylindrical section of said casing and the member defining a working chamber and floating on the hydraulic fluid in said reservoir, said annular piston being provided with 0-rings extending about the inner and outer peripheries thereof, the 0-ring provided on the outer periphery being disposed in sliding contact with the opposed surface of the casing, and the 0-ring provided on the inner periphery being disposed in sliding contact with the opposed surface of the member defining said working chamber, said annular piston provided with 0-rings as aforesaid being thereby arranged for separating the hydraulic fluid in said reservoir from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said device is turned upside down, and

Claim 101

an annular piston concentrically disposed between the upright cylindrical section of said casing and the member defining a working chamber and floating on the hydraulic fluid in said reservoir, said annular piston being provided with 0-rings extending about the inner and outer peripheries thereof, the 0-ring provided on the outer periphery being disposed in sliding contact with the opposed surface of the casing, and the 0-ring provided on the inner periphery being disposed in sliding contact with the opposed surface of the member defining said working chamber, said annular piston provided with 0-rings as aforesaid being thereby arranged for separating the hydraulic fluid in said reservoir from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said device is turned upside down, and

Claim 102

spring pressed valve means in said compression chamber operable for providing a unidirectional hydraulic fluid flow along the other of said flow paths, from said reservoir into said compression chamber, and

Claim 103

spring pressed valve means in said compression chamber operable for providing a unidirectional hydraulic fluid flow along the other of said flow paths, from said reservoir into said compression chamber, and

Claim 104

The combination according to claim 10 wherein the upper end portion of the compression coil spring within the compression chamber extends through the piston head and into the lower end portion of the piston rod.

Claim 105

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 106

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 107

The combination according to claim 8 wherein the tubular member providing a working chamber is seated upon the outer marginal area of an annulus which in turn is seated directly upon the bottom of the casing, the casing is provided with a boss extending upwardly from the bottom thereof through said annulus into the compression chamber, and said boss is bored and the undersurface of said annulus is grooved thereby to provide a passage for the flow of hydraulic fluid between the compression chamber and the reservoir.

Claim 108

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 109

a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod for engaging said bolster, said spring being partially compressed and effective for securing said motion damping means in position between said frame and bolster.

Claim 110

The combination according to claim 12 wherein a series of openings circumferentially spaced about the annulus extend therethrough, said openings and the grooves in the undersurface of said annulus conjointly provide a passage for the flow of hydraulic fluid between the compression chamber and reservoir, and spring pressed valve means in said compression chamber provide for unidirectional flow of hydraulic fluid through said series of openings from said reservoir into said compression chamber.

Claim 111

In a railroad car, the combination comprising A. a car body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 112

In a railroad car, the combination comprising A. a car body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 113

In a motion damping device, the combination comprising A. a casing, B. a member within said casing defining a working chamber and conjointly with said casing defining a reservoir extending about said member, C. a piston head operating in said working chamber and dividing the same into variable volume compression and compensating chambers, D. a piston rod extending upwardly from said piston head and through the top of said casing, E. spring means yieldably biasing said piston head upwardly to extend said piston rod, F. hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir, G. means valved for passage of said fluid from said compression chamber to said reservoir when said piston head is retracted against the influence of said spring means and for passage of said fluid from said reservoir to said compression chamber when said piston head is extended by said spring means, H. means in said reservoir floating on the hydraulic fluid therein and arranged for separating the same from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said device is turned upside down, and I. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 114

In a motion damping device, the combination comprising A. a casing, B. a member within said casing defining a working chamber and conjointly with said casing defining a reservoir extending about said member, C. a piston head operating in said working chamber and dividing the same into variable volume compression and compensating chambers, D. a piston rod extending upwardly from said piston head and through the top of said casing, E. spring means yieldably biasing said piston head upwardly to extend said piston rod, F. hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir, G. means valved for passage of said fluid from said compression chamber to said reservoir when said piston head is retracted against the influence of said spring means and for passage of said fluid from said reservoir to said compression chamber when said piston head is extended by said spring means, H. means in said reservoir floating on the hydraulic fluid therein and arranged for separating the same from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said device is turned upside down, and I. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 115

The combination according to claim 15 wherein the floating means in the reservoir comprises an annular piston, and the casing, the member defining a working chamber and said annular piston are concentrically disposed, said annular piston being disposed with said casing and the member defining said working chamber being disposed within said annular piston.

Claim 116

The combination according to claim 16 wherein the annular piston is slidably accommodated between cylindrical sections respectively of the casing and the member defining a working chamber.

Claim 117

The combination according to claim 17 wherein both the outer and inner peripheries of the annular piston mount 0-rings, the 0-ring provided on the outer periphery being disposed in sliding contAct with the opposed surface of the casing, and the 0-ring provided on the inner periphery being disposed in sliding contact with the opposed surface of the member defining a working chamber.

Claim 118

In a motion damping device, the combination comprising A. a casing provided with an upright cylindrical section, B. a cylindrical member within the upright cylindrical section of said casing, said member defining a working chamber and said member and casing conjointly defining a reservoir, C. a piston head for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head, D. a piston rod extending upwardly from said piston head and slidably through the top of said casing, E. a compression coil spring within said compression chamber yieldably urging said piston head and piston rod upwardly to extend the same, F. hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir, G. hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir, H. unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to all movement of said piston head in either direction, I. means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic fluid pressure in said compression chamber as it decreases in volume, J. valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume, K. an annular piston concentrically disposed between the upright cylindrical section of said casing and the member defining a working chamber and floating on the hydraulic fluid in said reservoir, said annular piston being provided with 0-rings extending about the inner and outer peripheries thereof, the 0-ring provided on the outer periphery being disposed in sliding contact with the opposed surface of the casing, and the 0-ring provided on the inner periphery being disposed in sliding contact with the opposed surface of the member defining said working chamber, said annular piston provided with 0-rings as aforesaid being thereby arranged for separating the hydraulic fluid in said reservoir from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said device is turned upside down, and L. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 119

In a motion damping device, the combination comprising A. a casing provided with an upright cylindrical section, B. a cylindrical member within the upright cylindrical section of said casing, said member defining a working chamber and said member and casing conjointly defining a reservoir, C. a piston head for operating in said working chamber and thereby dividing the same into a variable volume compression chamber under said piston head and a variable volume compensating chamber above said piston head, D. a piston rod extending upwardly from said piston head and slidably through the top of said casing, E. a compression coil spring within said compression chamber yieldably urging said piston head and piston rod upwardly to extend the same, F. hydraulic fluid completely filling said compression and compensating chambers and partially filling said reservoir, G. hydraulic fluid passage means provided with a fixed area orifice in a flow path between said compression chamber and reservoir, H. unvalved hydraulic fluid passage means providing for a restricted but continuous free flow of hydraulic fluid between said compression and compensating chambers in response to all movement of said piston head in either direction, I. means for converting said fixed area orifice to a variable area orifice and progressively increasing said area and the consequent flow of hydraulic fluid from said compression chamber to said reservoir in response to retraction of said piston head and the consequent increase in hydraulic fluid pressure in said compression chamber as it decreases in volume, J. valved hydraulic fluid passage means, the valve being operable for checking the flow of hydraulic fluid from said compression chamber to said reservoir through the associated passage means when the compression chamber is decreasing in volume, and being operable for opening and thereby permitting a free flow of hydraulic fluid from said reservoir to said compression chamber through the associated passage means when the compression chamber is increasing in volume, K. an annular piston concentrically disposed between the upright cylindrical section of said casing and the member defining a working chamber and floating on the hydraulic fluid in said reservoir, said annular piston being provided with 0-rings extending about the inner and outer peripheries thereof, the 0-ring provided on the outer periphery being disposed in sliding contact with the opposed surface of the casing, and the 0-ring provided on the inner periphery being disposed in sliding contact with the opposed surface of the member defining said working chamber, said annular piston provided with 0-rings as aforesaid being thereby arranged for separating the hydraulic fluid in said reservoir from the medium occupying the space thereabove, and for keeping said hydraulic fluid and medium from exchanging places in said reservoir when said device is turned upside down, and L. a compression coil spring seated upon said casing and extending upwardly therefrom a substantial distance above the upper extremity of said piston rod.

Claim 120

In a railroad vehicle, the combination comprising A. a vehicle body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 121

In a railroad vehicle, the combination comprising A. a vehicle body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 122

The combination according to claim 20 wherein the floating means in the reservoir comprises an annular piston, and the casing, the member defining a working chamber and said annular piston are concentrically disposed, said annular piston being disposed within said casing and the member defining said working chamber being disposed within said annular piston.

Claim 123

The combination according to claim 21 wherein the annular piston is slidably accommodated between cylindrical sections respectively of the casing and the member defining a working chamber.

Claim 124

The combination according to claim 22 wherein both the outer and inner peripheries of the annular piston mount 0-rings, the 0-ring provided on the outer periphery being disposed in sliding contact with the opposed surface of the casing, and the 0-ring provided on the inner periphery being disposed in sliding contact with the opposed surface of the member defining a working chamber.

Claim 125

In a railroad vehicle, the combination comprising A. a vehicle body, B. a pair of trucks respectively at opposite ends of said body, each including

Claim 126

In a railroad vehicle, the combination comprising A. a vehicle body, B. a pair of trucks respectively at opposite ends of said body, each including