US3891045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic transmission motor vehicle
Assignee: Individual
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Filing: 1974-04-05
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Granted: 1975-06-24
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Expires: 1994-04-05
Abstract
Abstract A hydraulic transmission motor vehicle. Hydraulic power means are provided for driving hydraulic motors for operating the vehicle''s wheels. Three-position open center directional valves are provided for controlling the forward and reverse speeds and for neutral position. Variable orifice bypass valves are coordinated with the three-position open center directional valves for controlling the speed of the motors. An internal combustion engine having constant driving and idling speed carburetors is employed to operate the hydraulic power means. A fixed displacement pump is employed as hydraulic power means, as well as fixed displacement hydraulic motors.
Inventors
- 👤 Vincent A Pancella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:12
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/04; B60K17/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
322 words
A hydraulic transmission motor vehicle comprising a wheel chassis, a pair of ground engaging wheels for said chassis hydraulic motor means for driving said wheels, hydraulic power means for driving the motor means, control means for controlling said hydraulic power means, combustion power means for operating said hydraulic power means, control means for said combustion power means, and brake means for locking the hydraulic motor means in an immovable position, a frame mounted on said chassis, said control means for controlling said hydraulic power means including a pair of three-position open center directional valves mounted on either side of said frame, said three-position open center directional valves being connected to said hydraulic power means and said hydraulic motor means, a pair of bypass variable orifice valves mounted on said chassis said orifice valves being located in conduits which by-pass said motor means, diverting the pressure fluid back to the hydraulic power means and provided with levers, respectively, and connected intermediate said hydraulic power means and said three position open center directional valves, a control stick displaceable in forward, neutral reverse and left and right directions, means operably connecting said stick to said three-position open center directional valves, means operably connecting said stick to said bypass variable orifice valves, respectively, said connecting means being arranged to open and close said bypass orifice valves proportionally to the steering direction said connecting means comprising a pair of upper cables each having one end secured to an upper end of said stick and one end to one of said levers, respectively, a pair of lower cables secured to the lower end of said stick and one end, respectively, to said levers, said control stick when moved forward or backward restricting the bypass flow, thereby increasing the power applied to the wheel motors, said control stick, when moved to one side, effecting a restriction of the by-pass flow from the wheel motor disposed on the opposite side.
Claim 2
Dependent Claim
322 words
A hydraulic transmission motor vehicle comprising a wheel chassis, a pair of ground engaging wheels for said chassis hydraulic motor means for driving said wheels, hydraulic power means for driving the motor means, control means for controlling said hydraulic power means, combustion power means for operating said hydraulic power means, control means for said combustion power means, and brake means for locking the hydraulic motor means in an immovable position, a frame mounted on said chassis, said control means for controlling said hydraulic power means including a pair of three-position open center directional valves mounted on either side of said frame, said three-position open center directional valves being connected to said hydraulic power means and said hydraulic motor means, a pair of bypass variable orifice valves mounted on said chassis said orifice valves being located in conduits which by-pass said motor means, diverting the pressure fluid back to the hydraulic power means and provided with levers, respectively, and connected intermediate said hydraulic power means and said three position open center directional valves, a control stick displaceable in forward, neutral reverse and left and right directions, means operably connecting said stick to said three-position open center directional valves, means operably connecting said stick to said bypass variable orifice valves, respectively, said connecting means being arranged to open and close said bypass orifice valves proportionally to the steering direction said connecting means comprising a pair of upper cables each having one end secured to an upper end of said stick and one end to one of said levers, respectively, a pair of lower cables secured to the lower end of said stick and one end, respectively, to said levers, said control stick when moved forward or backward restricting the bypass flow, thereby increasing the power applied to the wheel motors, said control stick, when moved to one side, effecting a restriction of the by-pass flow from the wheel motor disposed on the opposite side.
Claim 3
Dependent Claim
95 words
The vehicle as claimed in claim 1, said frame being provided with a pair of spaced horizontal tracks, a pair of booms slidable on said tracks, a plate slidable in forward and rearward directions and secured to said booms, said plate having a slot transverse to said pair of rails, a vehicle steering shaft mounted in said chassis, said steering shaft being connected to a convEntional front wheel steering mechanism, a gimbal pivoted on said vehicle steering shaft, said control stick being secured to said gimbal and having a lower end extending through said slot.
Claim 4
Dependent Claim
74 words
The vehicle as claimed in claim 2, wherein said three-position open center valves have exterior levers, said means operably connecting said control stick to said three-position open center directional valves are two pairs of springs, one end of each of said pairs of springs being secured to opposite ends of said booms, the other end of each of said springs being secured to said levers, respectively of said pair of three-position open center valves.
Claim 5
Dependent Claim
67 words
The vehicle as claimed in claim 3, wherein said variable orifice valves are gate valves having exterior levers for opening and closing said gate valves, said means operably connecting said control stick and said gate valves, being two pairs of wires having one of their ends secured to said control stick, the others of their ends secured to said exterior levers for opening and closing said valves.
Claim 6
Dependent Claim
56 words
The vehicle as claimed in claim 4, further provided with pairs of on-and -off valves at the inlet and outlet of each of said hydraulic motor means for stopping the flow of oil through said hydraulic motor means, a brake lever mounted on said chassis and means operably connecting said brake lever with said on-and-off valves.
Claim 7
Dependent Claim
48 words
The vehicle as claimed in claim 5, wherein said hydraulic power means for driving said power means comprises a rotary hydraulic pressure pump, a pressure accumulator connected to the outlet of said pump and an equalizer connected intermediate said pressure accumulator and said three-position open center directional valves.
Claim 8
Dependent Claim
124 words
The vehicle as claimed in claim 6, wherein said combustion power means, is an internal combustion engine provided with a manifold and with an idling speed carburetor and a driving speed carburetor, both of said carburetors having a common conduit to said manifold, a slide valve for opening and closing the path from said driving speed carburetor to said common conduit, a cylinder connected to said hydraulic power means for fluid communication therewith, a piston in said cylinder, a rod connecting said piston and said slide vavle, a coil spring biasing said piston for closing said slide valve, said piston being displaceable against the bias of said spring by hydraulic pressure of said hydraulic power means when said hydraulic power means are in operation.
Claim 9
Dependent Claim
65 words
The vehicle as claimed in clain 1, wherein said hydraulic motor means are fixedly mounted on said chassis, each of said motors having a drive gear, each of said wheels having an axle provided with a driven gear in engagement with said drive gear, a shock absorber pivoted with one end on said axle, the other end of said axle being pivoted to said chassis.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |