US3583243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling vehicle drive and power takeoff
Assignee: Individual
•
Filing: 1969-05-05
•
Granted: 1971-06-08
•
Expires: 1989-05-05
Abstract
Abstract A vehicle having an engine, operated at constant speed, driving both a power takeoff and traction wheels, the latter through a pressure-actuated slip clutch, torque converter and transmission. A manually operable control valve modulates pressure to the slip clutch to control ground speed and a power sensing means further modulates slip clutch pressure responsive to the load imposed on the power takeoff to divert engine power from the ground wheels to fulfill the power required by the power takeoff.
Inventors
- 👤 Harry R Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
F; F16; F16H; F16H45/00; F16H2045/002
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
112 words
The method of controlling the power transmitted from an engine to the traction means for a vehicle wherein the engine drives pump means to deliver fluid under pressure to hydraulic actuators and further drives a friction clutch adapted to progressively slip between fully engaged and disengaged condition, comprising the steps of: operating the engine at a substantially constant speed to in turn operate the pump means at a substantially constant delivery rate; selectively varying the amount of slippage in the clutch to control the power delivered to the traction means; and increasing the amount of slippage in the clutch in response to a predetermined increase in the resistance encountered by said actuators.
Claim 2
Independent Claim
112 words
The method of controlling the power transmitted from an engine to the traction means for a vehicle wherein the engine drives pump means to deliver fluid under pressure to hydraulic actuators and further drives a friction clutch adapted to progressively slip between fully engaged and disengaged condition, comprising the steps of: operating the engine at a substantially constant speed to in turn operate the pump means at a substantially constant delivery rate; selectively varying the amount of slippage in the clutch to control the power delivered to the traction means; and increasing the amount of slippage in the clutch in response to a predetermined increase in the resistance encountered by said actuators.
Claim 3
Dependent Claim
98 words
In combination with a traction vehicle having hydraulic actuators, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch, and second valve means in series with said first valve means and said clutch responsive to increased pressure in said actuators for further limiting the pressure in said clutch.
Claim 4
Dependent Claim
98 words
In combination with a traction vehicle having hydraulic actuators, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch, and second valve means in series with said first valve means and said clutch responsive to increased pressure in said actuators for further limiting the pressure in said clutch.
Claim 5
Dependent Claim
110 words
In combination with a traction vehicle having auxiliary equipment for performing work against a resistance, an engine governed to operate at a substantially constant speed, power takeoff means driven by the engine and connected to drive said equipment, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch, and second valve means in series with said first valve means and said clutch responsive to an increase in the resistance encountered by the auxiliary equipment for further limiting the pressure in said clutch.
Claim 6
Dependent Claim
110 words
In combination with a traction vehicle having auxiliary equipment for performing work against a resistance, an engine governed to operate at a substantially constant speed, power takeoff means driven by the engine and connected to drive said equipment, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch, and second valve means in series with said first valve means and said clutch responsive to an increase in the resistance encountered by the auxiliary equipment for further limiting the pressure in said clutch.
Claim 7
Dependent Claim
108 words
In combination with a traction vehicle having hydraulic actuators, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch; manual control means operatively connected to said valve means, pressure control means operatively connected to said valve means and responsive to increased pressure in said actuators to urge said first valve means to limit the pressure in said clutch.
Claim 8
Dependent Claim
108 words
In combination with a traction vehicle having hydraulic actuators, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch; manual control means operatively connected to said valve means, pressure control means operatively connected to said valve means and responsive to increased pressure in said actuators to urge said first valve means to limit the pressure in said clutch.
Claim 9
Dependent Claim
23 words
In a combination according to claim 4, and further comprising a lost-motion connection between said first valve means and said manual control means.
Claim 10
Dependent Claim
99 words
In combination with a traction vehicle having hydraulic actuator means, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch, and second valve means in series with said first valve means and said clutch responsive to increased flow to said actuator means for further limiting the pressure in said clutch.
Claim 11
Dependent Claim
99 words
In combination with a traction vehicle having hydraulic actuator means, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, first valve means for selectively varying the pressure in said clutch, and second valve means in series with said first valve means and said clutch responsive to increased flow to said actuator means for further limiting the pressure in said clutch.
Claim 12
Dependent Claim
30 words
In a combination according to claim 6, wherein said second valve means is also responsive to increased pressure to said actuator means for furthering limiting the pressure in said clutch.
Claim 13
Dependent Claim
22 words
In a combination according to claim 7, wherein said pump has a variable displacement and said actuator is a rotary hydraulic motor.
Claim 14
Dependent Claim
121 words
In combination with a traction vehicle having hydraulic actuator means, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, valve means for selectively varying the pressure in said clutch, manual control means operatively connected to said valve means for varying the pressure in said clutch in direct proportion to the desired ground speed. and overload control means operatively connected to said valve means for imposing a limitation on the clutch pressure in proportion to the hydraulic requirements of said actuator means.
Claim 15
Dependent Claim
121 words
In combination with a traction vehicle having hydraulic actuator means, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, valve means for selectively varying the pressure in said clutch, manual control means operatively connected to said valve means for varying the pressure in said clutch in direct proportion to the desired ground speed. and overload control means operatively connected to said valve means for imposing a limitation on the clutch pressure in proportion to the hydraulic requirements of said actuator means.
Claim 16
Dependent Claim
22 words
In a combination according to claim 9, wherein said overload control means is responsive to the pressure provided to said actuator means.
Claim 17
Dependent Claim
22 words
In a combination according to claim 9, wherein said overload control means is responsive to the flow requirements of said actuator means.
Claim 18
Dependent Claim
99 words
In combination with a traction vehicle having hydraulic actuator means, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, valve means arranged in series with said clutch, and positioning means operatively connected to said valve means for limiting the pressure in said clutch as both a function of desired ground speed and the hydraulic requirements of said actuator means.
Claim 19
Dependent Claim
99 words
In combination with a traction vehicle having hydraulic actuator means, an engine governed to operate at a substantially constant speed, pump means driven by the engine for supplying hydraulic fluid under pressure, a torque converter capable of being driven by the engine and supplying power for traction, a pressure operated slip clutch interposed between the engine and said converter, valve means arranged in series with said clutch, and positioning means operatively connected to said valve means for limiting the pressure in said clutch as both a function of desired ground speed and the hydraulic requirements of said actuator means.
References Cited (Backward Citations)
US2466244A
Cited
US3006199A
Cited
US3258081A
Cited
US3202018A
Cited
US3384209A
Cited
US3478621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |