US3795280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-way lever control for hydraulic control circuit
Assignee: Caterpillar Inc
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Filing: 1972-06-23
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Granted: 1974-03-05
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Expires: 1992-06-23
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
- 👤 R Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/10; B62D11/14; B62D11/18; B62D11/183; E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F9/00; E02F9/20; E02F9/2004; F; F16; F16K; F16K31/00; F16K31/44; G05G13/00; G05G2009/04703; G05G2009/04714; G05G2009/04774; G05G2700/00; G05G2700/22; G05G2700/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
327 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 said second arm for pivotal movement about a third axis, 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, electrical switch means mounted on said second arm, closely adjacent to said third arm for actuation thereby, and an electrically actuated third control valve operatively connected to said switch means, a pressurized fluid source operatively connected to said first and second control valves, fluid actuated first cylinder means operatively connected to one of said first and second control valves for actuation thereby and fluid actuated second and third cylinder means operatively connected to said third control valve for actuation thereby, said third control valve operatively connected to the other one of said first and second control valves, and a tractor having a bulldozer assembly, including a frame and a bulldozer blade attached thereto, mounted thereon, said first cylinder means operatively interconnected between said tractor and said frame for selectively raising or lowering said bulldozer assembly, said second cylinder means operatively interconnected between said frame and said blade for selectively tilting said blade and said third cylinder means operatively interconnected between said frame and said blade for selectively angling said blade.
Claim 2
Dependent Claim
327 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 said second arm for pivotal movement about a third axis, 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, electrical switch means mounted on said second arm, closely adjacent to said third arm for actuation thereby, and an electrically actuated third control valve operatively connected to said switch means, a pressurized fluid source operatively connected to said first and second control valves, fluid actuated first cylinder means operatively connected to one of said first and second control valves for actuation thereby and fluid actuated second and third cylinder means operatively connected to said third control valve for actuation thereby, said third control valve operatively connected to the other one of said first and second control valves, and a tractor having a bulldozer assembly, including a frame and a bulldozer blade attached thereto, mounted thereon, said first cylinder means operatively interconnected between said tractor and said frame for selectively raising or lowering said bulldozer assembly, said second cylinder means operatively interconnected between said frame and said blade for selectively tilting said blade and said third cylinder means operatively interconnected between said frame and said blade for selectively angling said blade.
Claim 3
Dependent Claim
18 words
The invention of claim 1 wherein said third axis is at least generally parallel to said second axis.
Claim 4
Dependent Claim
32 words
The invention of claim 1 wherein said three-way lever control and said first and second control valves are mounted on said tractor and said third control valve is mounted on said frame.
Claim 5
Dependent Claim
216 words
A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cyliNder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, a combined fluid and electrical circuit means for selectively actuating each of said cylinder means comprising a pressurized fluid source, single lever manual control means mounted on said tractor, first valve means operatively interconnected between said lift cylinder means and said manual control means for selectively communicating pressurized fluid to said lift cylinder means from said pressurized fluid source, a directional control valve means mounted on said frame and operatively connected directly to each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, second valve means operatively interconnected between said directional control valve means and said manual control means for selectively communicating pressurized fluid to said directional control valve means from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.
Claim 6
Dependent Claim
216 words
A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cyliNder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, a combined fluid and electrical circuit means for selectively actuating each of said cylinder means comprising a pressurized fluid source, single lever manual control means mounted on said tractor, first valve means operatively interconnected between said lift cylinder means and said manual control means for selectively communicating pressurized fluid to said lift cylinder means from said pressurized fluid source, a directional control valve means mounted on said frame and operatively connected directly to each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, second valve means operatively interconnected between said directional control valve means and said manual control means for selectively communicating pressurized fluid to said directional control valve means from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.
Claim 7
Dependent Claim
205 words
A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cylinder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, fluid circuit means for sleectively actuating each of said cylinder means comprising a pressurized fluid source, a three-way single lever control means mounted on said tractor comprising first, second and third arms pivotally mounted together and actuating means operatively connecting said first, second and third arms to first, second and third control valves, respectively, to selectively actuate same, said first and second control valves mounted on said tractor and said third control valve mounted on said frame, said third control valve comprising a directional control valve means operatively interconnected between said second valve and each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.
Claim 8
Dependent Claim
205 words
A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cylinder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, fluid circuit means for sleectively actuating each of said cylinder means comprising a pressurized fluid source, a three-way single lever control means mounted on said tractor comprising first, second and third arms pivotally mounted together and actuating means operatively connecting said first, second and third arms to first, second and third control valves, respectively, to selectively actuate same, said first and second control valves mounted on said tractor and said third control valve mounted on said frame, said third control valve comprising a directional control valve means operatively interconnected between said second valve and each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |