192 clutches and power-stop control – Clutch and brake – Vehicle type
Patent
1973-02-23
1976-05-18
Scott, Samuel
192 clutches and power-stop control
Clutch and brake
Vehicle type
192 4A, 192 4C, 192 12C, F16d 6704
Patent
active
039571459
ABSTRACT:
Clutch controlling apparatus which may be utilized in industrial-type vehicles, such as for example, forklift trucks, for controlling the vehicle during inching operations includes a source of fluid pressure, a fluid pressure-type clutch fluidically connected to the pressure source, an inching valve disposed within the fluid circuit connecting the fluid pressure source and the clutch mechanism which controls the degree to which the clutch mechanism is actuated and which in turn is actuated to a degree which is dependent upon the depression of the vehicle brake pedal, and limiting means for selectively inactivating the inching valve such that the inching valve is inoperative independent of the brake pedal.
In this manner, when the vehicle is being operated on level ground, the inching operation is performed by intermittently depressing the brake pedal which actuates the inching valve which in turn deactivates the clutch mechanism thereby terminating driving torque to the vehicle transmission. When the vehicle is operated upon ground having a downward slope, the limiting means inactivates the inching valve whereupon depression of the brake pedal does not actuate the inching valve so as to deactuate the clutch mechanism. Consequently, the vehicle is not effectively placed in a neutral condition and the vehicle does not operate in an uncontrolled manner and the inching operation may be performed by the braking means.
REFERENCES:
patent: 2917143 (1959-12-01), Jenny
patent: 3240371 (1966-03-01), Conrad
patent: 3631948 (1972-01-01), Ishikawa
patent: 3696897 (1972-10-01), Kitano et al.
patent: 3757915 (1973-09-01), Mamose
Kitano Shin
Momose Yutaka
Aisin Seiki Co., Ltd.
Chandler Lance W.
Scott Samuel
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