US3886848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated directional control valve
Assignee: TDK Micronas GmbH
•
Filing: 1974-04-03
•
Granted: 1975-06-03
•
Expires: 1994-04-03
Abstract
Abstract A valve that permits a hydraulic or other fluid to be fed to two utilization devices by means of a pump. Priority is given to one device. The control is advantageously effected directly by the pressure of an accumulator, when it is the one of the devices which is given priority. Resilient means having a negative force or snap acting characteristic provides a rapid control.
Inventors
- 👤 Ludwig Budecker
- 👤 Grunberg Hubertus Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:57
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/14; B60T13/148; F; F15; F15B; F15B1/00; F15B1/02; F15B1/027
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
409 words
An apparatus including first and second utilization systems each having an inlet and requiring higher and lower predetermined pressures to operate the same, respectively, a fluid pressure accumulator having a port in communication with said first system inlet, a check valve having an inlet, and an outlet, said check valve outlet being in communication with said accumulator port and said first system inlet, said check valve being adapted to close when the accumulator pressure is above that in said check valve inlet, a pump having an inlet and an outlet, and third means connecting said pump outlet to said check valve inlet, said third means comprising: a valve body having first and second inlets, and first and second outlets, said first and second inlets being connected to said pump outlet and said check valve outlet, respectively, said first and second outlets being connected to said check valve inlet and said second system inlet, respectively; a main valve mounted in said body in a manner movable from a first position to a second position different from said first position, and vice versa, said main valve providing communication between said first inlet and said second outlet when located in said first position thereof, said main valve closing off communication between said first inlet and said second outlet when located in said second position thereof, resilient means mounted in said body in a position biasing said main valve to said second position thereof, said main valve having a surface, said main valve being movable in a predetermined direction opposite the direction in which at least a component of force is applied thereto by said resilient means, said body defining a chamber with said surface, said main valve being movable in said predetermined direction by a fluid under pressure in said chamber; conduit means forming a restriction CONNECTING said chamber with said first inlet; a pilot valve mounted in said body and being actuable to open and to closed positions when the accumulator pressure is at lower and higher different predetermined pressure, respectively; operator means mounted in said second inlet to actuate said pilot valve, said body having a first path therethrough providing free and open communication from said chamber to one side of and through to the other side of said pilot valve, said body having a vent port, said body also having a second path therethrough providing free and open communication from said pilot valve one side to said vent port.
Claim 2
Independent Claim
409 words
An apparatus including first and second utilization systems each having an inlet and requiring higher and lower predetermined pressures to operate the same, respectively, a fluid pressure accumulator having a port in communication with said first system inlet, a check valve having an inlet, and an outlet, said check valve outlet being in communication with said accumulator port and said first system inlet, said check valve being adapted to close when the accumulator pressure is above that in said check valve inlet, a pump having an inlet and an outlet, and third means connecting said pump outlet to said check valve inlet, said third means comprising: a valve body having first and second inlets, and first and second outlets, said first and second inlets being connected to said pump outlet and said check valve outlet, respectively, said first and second outlets being connected to said check valve inlet and said second system inlet, respectively; a main valve mounted in said body in a manner movable from a first position to a second position different from said first position, and vice versa, said main valve providing communication between said first inlet and said second outlet when located in said first position thereof, said main valve closing off communication between said first inlet and said second outlet when located in said second position thereof, resilient means mounted in said body in a position biasing said main valve to said second position thereof, said main valve having a surface, said main valve being movable in a predetermined direction opposite the direction in which at least a component of force is applied thereto by said resilient means, said body defining a chamber with said surface, said main valve being movable in said predetermined direction by a fluid under pressure in said chamber; conduit means forming a restriction CONNECTING said chamber with said first inlet; a pilot valve mounted in said body and being actuable to open and to closed positions when the accumulator pressure is at lower and higher different predetermined pressure, respectively; operator means mounted in said second inlet to actuate said pilot valve, said body having a first path therethrough providing free and open communication from said chamber to one side of and through to the other side of said pilot valve, said body having a vent port, said body also having a second path therethrough providing free and open communication from said pilot valve one side to said vent port.
Claim 3
Independent Claim
409 words
An apparatus including first and second utilization systems each having an inlet and requiring higher and lower predetermined pressures to operate the same, respectively, a fluid pressure accumulator having a port in communication with said first system inlet, a check valve having an inlet, and an outlet, said check valve outlet being in communication with said accumulator port and said first system inlet, said check valve being adapted to close when the accumulator pressure is above that in said check valve inlet, a pump having an inlet and an outlet, and third means connecting said pump outlet to said check valve inlet, said third means comprising: a valve body having first and second inlets, and first and second outlets, said first and second inlets being connected to said pump outlet and said check valve outlet, respectively, said first and second outlets being connected to said check valve inlet and said second system inlet, respectively; a main valve mounted in said body in a manner movable from a first position to a second position different from said first position, and vice versa, said main valve providing communication between said first inlet and said second outlet when located in said first position thereof, said main valve closing off communication between said first inlet and said second outlet when located in said second position thereof, resilient means mounted in said body in a position biasing said main valve to said second position thereof, said main valve having a surface, said main valve being movable in a predetermined direction opposite the direction in which at least a component of force is applied thereto by said resilient means, said body defining a chamber with said surface, said main valve being movable in said predetermined direction by a fluid under pressure in said chamber; conduit means forming a restriction connecting said chamber with said first inlet; a pilot valve mounted in said body and being actuable to open and to closed positions when the accumulator pressure is at lower and higher different predetermined pressure, respectively; operator means mounted in said second inlet to actuate said pilot valve, said body having a first path therethrough providing free and open communication from said chamber to one side of and through to the other side of said pilot valve, said body having a vent port, said body also having a second path therethrough providing free and open communication from said pilot valve one side to said vent port.
Claim 4
Independent Claim
409 words
An apparatus including first and second utilization systems each having an inlet and requiring higher and lower predetermined pressures to operate the same, respectively, a fluid pressure accumulator having a port in communication with said first system inlet, a check valve having an inlet, and an outlet, said check valve outlet being in communication with said accumulator port and said first system inlet, said check valve being adapted to close when the accumulator pressure is above that in said check valve inlet, a pump having an inlet and an outlet, and third means connecting said pump outlet to said check valve inlet, said third means comprising: a valve body having first and second inlets, and first and second outlets, said first and second inlets being connected to said pump outlet and said check valve outlet, respectively, said first and second outlets being connected to said check valve inlet and said second system inlet, respectively; a main valve mounted in said body in a manner movable from a first position to a second position different from said first position, and vice versa, said main valve providing communication between said first inlet and said second outlet when located in said first position thereof, said main valve closing off communication between said first inlet and said second outlet when located in said second position thereof, resilient means mounted in said body in a position biasing said main valve to said second position thereof, said main valve having a surface, said main valve being movable in a predetermined direction opposite the direction in which at least a component of force is applied thereto by said resilient means, said body defining a chamber with said surface, said main valve being movable in said predetermined direction by a fluid under pressure in said chamber; conduit means forming a restriction connecting said chamber with said first inlet; a pilot valve mounted in said body and being actuable to open and to closed positions when the accumulator pressure is at lower and higher different predetermined pressure, respectively; operator means mounted in said second inlet to actuate said pilot valve, said body having a first path therethrough providing free and open communication from said chamber to one side of and through to the other side of said pilot valve, said body having a vent port, said body also having a second path therethrough providing free and open communication from said pilot valve one side to said vent port.
Claim 5
Dependent Claim
15 words
The invention as defined in claim 1, wherein said main valve includes a valve slide.
Claim 6
Dependent Claim
17 words
The invention as defined in claim 1, wherein said conduit means is located within said main valve.
Claim 7
Dependent Claim
37 words
The invention as defined in claim 1, wherein said operator means includes snap-acting, spring-like means to bias said pilot valve toward its open position, said spring-like means changing position rapidly at said higher and lower accumulator pressures.
Claim 8
Dependent Claim
21 words
The invention as defined in claim 4, including a reservoir connected with the inlet of said pump and said vent port.
Claim 9
Dependent Claim
16 words
The invention as defined in claim 4, wherein said spring-like means includes a snap-acting Belleville spring.
Claim 10
Dependent Claim
21 words
The invention as defined in claim 6, including a reservoir connected with the inlet of said pump and said vent port.
Claim 11
Dependent Claim
23 words
The invention as defined in claim 4, wherein said spring-like means includes a helical spring and a permanent magnet to provide snap action.
Claim 12
Dependent Claim
21 words
The invention as defined in claim 8, including a reservoir connected with the inlet of said pump and said vent port.
Claim 13
Dependent Claim
72 words
The invention as defined in claim 1, including a reservoir connected with the inlet of said pump and said vent port, said pilot valve having a port opening, said first and second paths having interior cross sections and said pilot valve having an opening cross section, all of which are large in comparison to the interior cross section of said conduit means, said check valve outlet being connected to said second inlet.
Claim 14
Dependent Claim
20 words
The invention as defined in claim 10, wherein said pilot valve includes spring-like means biasing it toward its open position.
Claim 15
Dependent Claim
27 words
The invention as defined in claim 11, wherein said spring-like means is snap acting and changes position rapidly at the higher and lower pressures of said accumulator.
Claim 16
Dependent Claim
17 words
The invention as defined in claim 12, wherein said conduit means is located within said main valve.
Claim 17
Dependent Claim
21 words
The invention as defined in claim 1, including a reservoir connected with the inlet of said pump and said vent port.
Claim 18
Dependent Claim
59 words
The invention as defined in claim 1, wherein said pilot valve has a port opening, said first and second paths having interior cross sections and said pilot valve having an opening cross section, all of which are large in comparison to the interior cross section of said conduit means, said check valve outlet being connected to said second inlet.
Claim 19
Dependent Claim
20 words
The invention as defined in claim 1, wherein said pilot valve includes spring-like means biasing it toward its open position.
Claim 20
Dependent Claim
27 words
The invention as defined in claim 16, wherein said spring-like means is snap acting and changes position rapidly at the higher and lower pressures of said accumulator.
Claim 21
Dependent Claim
17 words
The invention as defined in claim 1, wherein said conduit means is located within said main valve.
Claim 22
Dependent Claim
59 words
The invention as defined in claim 14, wherein said pilot valve has a port opening, said first and second paths having interior cross sections and said pilot valve having an opening cross section, all of which are large in comparison to the interior cross section of said conduit means, said check valve outlet being connected to said second inlet.
Claim 23
Dependent Claim
20 words
The invention as defined in claim 19, wherein said pilot valve includes spring-like means biasing it toward its open position.
Claim 24
Dependent Claim
27 words
The invention as defined in claim 20, wherein said spring-like means is snap acting and changeS position rapidly at the higher and lower pressure of said accumulator.
Claim 25
Dependent Claim
17 words
The invention as defined in claim 21, wherein said conduit means is located within said main valve.
Claim 26
Dependent Claim
17 words
The invention as defined in claim 19, wherein said conduit means is located within said main valve.
Claim 27
Dependent Claim
20 words
The invention as defined in claim 23, wherein said pilot valve includes spring-like means biasing it toward its open position.
Claim 28
Dependent Claim
20 words
The invention as defined in claim 14, wherein said pilot valve includes spring-like means biasing it toward its open position.
Claim 29
Dependent Claim
27 words
The invention as defined in claim 25, wherein said spring-like means is snap acting and changes position rapidly at the higher and lower pressure of said accumulator.
Claim 30
Dependent Claim
17 words
The invention as defined in claim 26, wherein said conduit means is located within said main valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |