Power plants – Pressure fluid source and motor – Pulsator
Patent
1994-12-28
1996-05-28
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Pulsator
60441, 192 4A, B60J 1300, B60K 4126
Patent
active
055199968
ABSTRACT:
A inching system adapted for releasing a transmission clutch to disconnect engine power delivery in an industrial vehicle comprises a main pump for creating pump pressure; a brake pedal operated by a driver; a master cylinder communicating with the main pump through a pump pressure supply conduit for producing brake pressure in to perform a brake operation as the brake pedal is pressed; a charging pump for discharging clutch actuation fluid to be fed to the transmission clutch; an inching valve including a valve housing having a pilot chamber provided at a first end thereof to receive the pump pressure and a valve spool slidably fitted within the valve housing, the valve spool having a first operative position for feeding the clutch actuation fluid to the transmission clutch to engage the clutch and a second operative position for cutting off the clutch actuation fluid to release the transmission clutch when the pressure within the pilot chamber becomes higher than a predetermined valve; and a pilot conduit for interconnecting the pump pressure supply conduit and the pilot chamber.
REFERENCES:
patent: 4006805 (1977-02-01), Zeller et al.
patent: 4093051 (1978-06-01), Kreitzberg
patent: 4289221 (1981-09-01), Chambers et al.
patent: 4317331 (1982-03-01), Aruea et al.
patent: 4579200 (1986-04-01), Murakami et al.
patent: 4598545 (1986-07-01), Harada
patent: 4651846 (1987-05-01), Headrick
patent: 4696380 (1987-09-01), Kita
patent: 4828338 (1989-05-01), Ocvirk et al.
Daewoo Heavy Industries Ltd.
Nguyen Hoang
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