Patent US3834278A successfully refreshed from Google Patents.
US3834278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power steering system with auxiliary power capability
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1972-12-15
•
Granted: 1974-09-10
•
Expires: 1992-12-15
Abstract
Abstract A vehicular power steering system including a primary hydraulic circuit for operating the steered wheels and a secondary hydraulic circuit for operating auxiliary equipment such as an implement or the like which may be attached to the vehicle. The system includes a fluid controller for controlling the flow of pressurized fluid from a power pump to the primary or steering circuit and the implement or secondary circuit. The fluid controller includes a valve mechanism which is constructed and arranged to provide the primary hydraulic circuit with pressurized fluid in the amount necessary to produce the desired steering maneuver while furnishing the secondary hydraulic circuit with the excess pressurized fluid supplied by the power pump. Thus the requirements of the primary hydraulic circuit may be always satisfied and have priority over the requirements of the secondary circuit in all modes of operation.
Inventors
- 👤 R Goff
- 👤 J Rau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:15
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/09; B62D5/093; B62D5/097; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702; Y10T137/86919
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
A fluid controller comprising a housing having a fluid inlet port, a pair of working ports, a return port and an auxiliary port formed therein, and valve means for selectively interconnecting said ports including a valve element movable in one direction from a neutral position to an operating position and in another direction from said neutral position to another operating position, said valve means, in the neutral position of said valve element, establishing a flow path between said inlet port and said auxiliary port and, during movement of said valve element toward either of said operating positions of said valve element maintaining said flow path between said inlet port and said auxiliary port and establishing a restricted flow path between said inlet port and one of said working ports and establishing a flow path between the other of said working ports and said return port, said valve means being effective, as said valve element moves progressively from said neutral position toward one of said working ports, to progressively increase the restriction between said inlet port and said auxiliary port and to progressively decrease the restriction between the inlet port and the one of said working ports to which it is connected.
Claim 2
Dependent Claim
201 words
A fluid controller comprising a housing having a fluid inlet port, a pair of working ports, a return port and an auxiliary port formed therein, and valve means for selectively interconnecting said ports including a valve element movable in one direction from a neutral position to an operating position and in another direction from said neutral position to another operating position, said valve means, in the neutral position of said valve element, establishing a flow path between said inlet port and said auxiliary port and, during movement of said valve element toward either of said operating positions of said valve element maintaining said flow path between said inlet port and said auxiliary port and establishing a restricted flow path between said inlet port and one of said working ports and establishing a flow path between the other of said working ports and said return port, said valve means being effective, as said valve element moves progressively from said neutral position toward one of said working ports, to progressively increase the restriction between said inlet port and said auxiliary port and to progressively decrease the restriction between the inlet port and the one of said working ports to which it is connected.
Claim 3
Dependent Claim
80 words
A fluid controller as defined in claim 1 and including an operating shaft journalled for rotation on said housing, and means interconnecting said operating shaft and said valve element for moving said valve element from said neutral position to one of said operating positions as said operating shaft is rotated in one direction and for moving said valve element from said neutral position to the other of said operating positions as said operating shaft is rotated in the opposite direction.
Claim 4
Dependent Claim
32 words
The fluid controller as defined in claim 1 in which said valve element is axially arranged and shifts axially as it moves from said neutral position toward either of said operating positions.
Claim 5
Dependent Claim
60 words
The fluid controller of claim 1 wherein the valve element completely blocks fluid flow from said inlet port to said auxiliary port at each of the operating positions thereof and provides an unrestricted flow path to the respective one of said working ports while providing an unrestricted flow path from the other of said working ports to said return port.
Claim 6
Dependent Claim
176 words
A fluid controller comprising a housing, said housing including a fluid inlet, first and second working ports, a fluid return port and an auxiliary port, a valve movably located within said housing and having a neutral position communicating the inlet to the auxiliary port and blocking the inlet from the first and second working ports, said valve having first and second operative positions communicating said inlet with the first and second working ports respectively and said valve blocking communication with the second and first working ports at the first and second operative positions of the valve respectively and progressively restricting communication from the inlet to the auxiliary port and progressively increasing communication between the inlet and the first or second working ports and establishing communication between the other of said working ports and said return port as said valve is moved from said neutral position; spring means normally biasing said valve to the neutral position, and a valve actuator operatively associated with said valve for moving said valve from the neutral position to the operative positions.
Claim 7
Dependent Claim
176 words
A fluid controller comprising a housing, said housing including a fluid inlet, first and second working ports, a fluid return port and an auxiliary port, a valve movably located within said housing and having a neutral position communicating the inlet to the auxiliary port and blocking the inlet from the first and second working ports, said valve having first and second operative positions communicating said inlet with the first and second working ports respectively and said valve blocking communication with the second and first working ports at the first and second operative positions of the valve respectively and progressively restricting communication from the inlet to the auxiliary port and progressively increasing communication between the inlet and the first or second working ports and establishing communication between the other of said working ports and said return port as said valve is moved from said neutral position; spring means normally biasing said valve to the neutral position, and a valve actuator operatively associated with said valve for moving said valve from the neutral position to the operative positions.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |