US3602326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual power steering system
Assignee: Garrison Mfg Co Inc
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Filing: 1969-08-22
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Granted: 1971-08-31
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Expires: 1989-08-22
Abstract
Abstract A dual, fluid operated, power steering system having two separate fluid operated steering motors connected to the steerable wheels of the vehicle, two separate steering valves respectively controlling the two steering motors, and two separate pumps respectively connected to and supplying fluid under pressure to the steering valves. The two steering valves respectively form parts of an elongated link one end of which is connected to the steerable wheels to move therewith. In some instances, the other end of the elongated link is anchored to the frame of the vehicle, and a portion of the elongated link constitutes a control motor comprising a control cylinder and a control piston. A manually operated fluid control system selectively delivers fluid under pressure to the control cylinder on opposite sides of the control piston to actuate the two steering valves simultaneously. In another instance, the other end of the elongated link is connected directly to a manually operated pitman arm which simultaneously operates both steering valves, one directly and the other through an elongated connection between the two steering valves.
Inventors
- 👤 Robert A Garrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:18
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/30; B62D5/32
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
In a dual, fluid operated, power steering system for a vehicle having a frame and steerable means, the combination of: a. two fluid operated steering motors connected to said steerable means; b. two steering valves respectively connected to and controlling said steering motors; c. two steering pumps respectively connected to and supplying fluid under pressure to said steering valves; d. a control motor, comprising a control cylinder and a control piston, aligned with said steering valves and forming therewith an elongated variable-length steering-valve link constituting means for actuating said steering valves; e. manually operable means for delivering fluid underpressure to said control cylinder on opposite sides of said control piston selectively to vary the length of said steering-valve link and thus actuate said steering valves selectively; and f. means connecting the ends of said steering-valve link to said steerable means and said frame, respectively.
Claim 2
Dependent Claim
144 words
In a dual, fluid operated, power steering system for a vehicle having a frame and steerable means, the combination of: a. two fluid operated steering motors connected to said steerable means; b. two steering valves respectively connected to and controlling said steering motors; c. two steering pumps respectively connected to and supplying fluid under pressure to said steering valves; d. a control motor, comprising a control cylinder and a control piston, aligned with said steering valves and forming therewith an elongated variable-length steering-valve link constituting means for actuating said steering valves; e. manually operable means for delivering fluid underpressure to said control cylinder on opposite sides of said control piston selectively to vary the length of said steering-valve link and thus actuate said steering valves selectively; and f. means connecting the ends of said steering-valve link to said steerable means and said frame, respectively.
Claim 3
Dependent Claim
29 words
A dual power steering system as set forth in claim 1 wherein said steering-valve link has said steering valves at its ends and said control motor in the middle.
Claim 4
Dependent Claim
27 words
A dual power steering system according to claim 1 wherein said steering-valve link has said steering valves at one end and said control motor at the other.
Claim 5
Dependent Claim
35 words
A dual power steering system as defined in claim 1 including spring means interconnecting said control cylinder and said control piston for biasing said control piston toward an intermediate position relative to said control cylinder.
Claim 6
Dependent Claim
40 words
A dual power steering system as set forth in claim 1 wherein said control means includes a control pump and a control valve for connecting said control pump to said control cylinder on opposite sides of said control piston selectively.
Claim 7
Dependent Claim
31 words
A dual power steering system according to claim 5 wherein said control valve is fluid operated and wherein said control means includes manually operable pump means for operating said control valve.
Claim 8
Dependent Claim
144 words
In a dual, fluid operated, power steering system for a vehicle having a frame and steerable means, the combination of: a. two fluid operated steering motors connected to said steerable means; b. two steering valves respectively connected to and controlling said steering motors; c. said steering valves being aligned and forming parts of an elongated steering-valve link and being actuable in response to the development of a longitudinal force in said steering-valve link; d. two steering pumps respectively connected to and supplying fluid undeR pressure to said steering valves; e. means connecting one end of said steering-valve link to said steerable means so as to apply to said steerable means any longitudinal force developed in said steering-valve link; and f. manually operable means acting on said steering-vlave link for developing a longitudinal force in said steering-valve link so as to actuate said steering valves.
Claim 9
Dependent Claim
144 words
In a dual, fluid operated, power steering system for a vehicle having a frame and steerable means, the combination of: a. two fluid operated steering motors connected to said steerable means; b. two steering valves respectively connected to and controlling said steering motors; c. said steering valves being aligned and forming parts of an elongated steering-valve link and being actuable in response to the development of a longitudinal force in said steering-valve link; d. two steering pumps respectively connected to and supplying fluid undeR pressure to said steering valves; e. means connecting one end of said steering-valve link to said steerable means so as to apply to said steerable means any longitudinal force developed in said steering-valve link; and f. manually operable means acting on said steering-vlave link for developing a longitudinal force in said steering-valve link so as to actuate said steering valves.
Claim 10
Dependent Claim
28 words
A dual power steering system as defined in claim 7 wherein said manually operable means includes a pitman arm connected to the other end of said steering-valve link.
Claim 11
Dependent Claim
65 words
A dual power steering system according to claim 7 wherein: a. the other end of said steering-valve link is connected to said frame; b. said steering-valve link includes extensible and contractable means; and c. said manually operable means includes means for extending and contracting said extensible and contractable means so as to develop a longitudinal force in said steering-valve link to actuate said steering valves.
Claim 12
Dependent Claim
22 words
A dual power steering system as set forth in claim 9 wherein said extensible and contractable means is between said steering valves.
Claim 13
Dependent Claim
22 words
A dual power steering system according to claim 9 wherein said extensible and contractable means forms one end of said steering-valve link.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |