Power plants – Pressure fluid source and motor – Pulsator
Patent
1980-06-24
1983-06-21
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60581, 91519, B60T 1300
Patent
active
043888062
ABSTRACT:
A hydro-pneumatic operating device for motor vehicle clutches permits shifting into second or higher gears without operation of the clutch pedal, by manipulation of an electric switch that actuates an electro-pneumatic valve. A cylinder block 31 is provided that houses a hydraulic working cylinder having a hydraulic piston of a hydro-pneumatic piston, and a pneumatic servo-valve unit whose path control is actuated by an external operating element which cooperates with a pneumatic servo-piston (14) of the hydro-pneumatic piston (20). On an end face of the pneumatic servo-piston (14) opposite a pneumatic servo-chamber (11) there is a supporting surface 19 whose countersurface 118 is formed on the pneumatic servo-piston (20a) of the hydro-pneumatic piston 20. The other side of pneumatic servo-piston 20a confines a blow-off chamber 22. A cylinder section 13 of a pneumatic working chamber 15 enclosed by the hydraulic pneumatic piston 20 and the pneumatic servo-piston 14 has a connection 66 for pressure medium. The hydro-pneumatic piston 20 has a duct 46 leading to blow-off chamber 22, which chamber 22 has a blow-off unit 47 discharging to the free atmosphere. An axial bore 51 leading to duct 46 has a shaft 50 with a longitudinal through channel 49 communicating with a blow-off chamber 119 of the path controlling servo-valve unit.
REFERENCES:
patent: 3083694 (1963-04-01), Schanz
patent: 3115067 (1963-12-01), Ayers, Jr.
patent: 4096696 (1978-06-01), van House
patent: 4107926 (1978-08-01), Adachi
patent: 4170876 (1979-10-01), Dits
patent: 4199940 (1980-04-01), Mathues
patent: 4244185 (1981-01-01), Belart
patent: 4244186 (1981-01-01), Mehren
patent: 4313302 (1982-02-01), Farr
Szarka Istvan
Urbantsok Janos
Autoipari Kutato es Fejleszto Vallalat
Hershkovitz Abraham
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