Patent US5875207A successfully refreshed from Google Patents.
Patent US3897805A successfully refreshed from Google Patents.
US3897805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-way lever control for actuating a plurality of valves
Assignee: Caterpillar Inc
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Filing: 1973-09-21
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Granted: 1975-08-05
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Expires: 1993-09-21
Abstract
Abstract An articulated handle comprises first, second and third arms pivotally attached together with each arm operatively connected to a respective directional control valve. The handle and first and second control valves, operatively connected to the first and second arms, are mounted on a tractor whereas a solenoid actuated third control valve is mounted on the frame of a bulldozer assembly. A pair of lift cylinders, interconnected between the tractor and frame, are operatively connected to the first control valve whereas tilt and angle cylinders, interconnected between the frame and a bulldozer blade, are operatively connected to the third control valve.
Inventors
- 👤 Robert Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:29
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F9/00; E02F9/20; E02F9/2004; G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/04703; G05G2009/04714; G05G2009/04774; G05G2700/00; G05G2700/22; G05G2700/32; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87072; Y10T137/87096; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20201
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A three-way lever control adapted to actuate separate valves comprising a stationary support and an articulated handle having a first arm, adapted to actuate a first valve, pivotally mounted on said support for pivotal movement about a first axis, a second arm, adapted to actuate a second valve, pivotally mounted on said first arm for pivotal movement about a second axis disposed transversely relative to said first axis, and a third arm, adapted to actuate a third valve, pivotally mounted on a side of said second arm for pivotal movement about a third axis disposed at least generally parallel to said second axis, said third arm being pivotally mounted at a mid-portion thereof on said second arm and comprising a first lever portion extending upwardly along said second arm for simultaneous actuation therewith and a second lever portion extending downwardly in close proximity to an electrical switch means mounted on said second arm whereby movement of said second lever portion upon movement of said first lever portion will engage and actuate said electrical switch means.
Claim 2
Dependent Claim
175 words
A three-way lever control adapted to actuate separate valves comprising a stationary support and an articulated handle having a first arm, adapted to actuate a first valve, pivotally mounted on said support for pivotal movement about a first axis, a second arm, adapted to actuate a second valve, pivotally mounted on said first arm for pivotal movement about a second axis disposed transversely relative to said first axis, and a third arm, adapted to actuate a third valve, pivotally mounted on a side of said second arm for pivotal movement about a third axis disposed at least generally parallel to said second axis, said third arm being pivotally mounted at a mid-portion thereof on said second arm and comprising a first lever portion extending upwardly along said second arm for simultaneous actuation therewith and a second lever portion extending downwardly in close proximity to an electrical switch means mounted on said second arm whereby movement of said second lever portion upon movement of said first lever portion will engage and actuate said electrical switch means.
Claim 3
Dependent Claim
73 words
The invention of claim 1 further comprising first and second control valves each having a stem reciprocally mounted therein, means pivotally interconnecting each of said first and second arms with a respective one of said valve stems whereby pivotal movement of said handle about said first axis will reciprocate one of said valve stems and pivotal movement of said handle about said second axis will reciprocate the other one of said valve stems.
Claim 4
Dependent Claim
19 words
The invention of claim 1 further comprising an electrically actuated third control valve operatively connected to said switch means.
References Cited (Backward Citations)
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |