Simple action actuator with a hydraulic fast-opening valve...

Details Simple action actuator with a hydraulic fast-opening valve... Simple action actuator with a hydraulic fast-opening valve...

2007-11-20

2007-11-20

Bonck, Rodney H. (Department: 3681)

192 clutches and power-stop control

Clutches

Operators

C060S478000, C091S433000, C091S442000

Reexamination Certificate

active

10533343

ABSTRACT:
An actuator with a simple function for the control of a friction clutch in the drive train of a motor vehicle having a cylinder/piston unit for generating the contact pressure of the clutch should be fast, inherently safe and nevertheless simple and inexpensive. For this purpose, a controllable pump (3) generates a pressure medium and makes it available to the cylinder/piston unit (1) via a self-regulating valve unit (2). A dump valve (8) consists of a sleeve (10) and a spring-assisted slide (12) therein. The sleeve has a first opening (11), through which the pressure medium can flow from the cylinder/piston unit (1). The slide (12) exposes the opening (11) in a first position and conceals the opening of a second position. The clutch is controlled in this way by actuating the electric motor.

REFERENCES:
patent: 2916879 (1959-12-01), Gondek
patent: 3060688 (1962-10-01), Gondek
patent: 4505364 (1985-03-01), Goucher et al.
patent: 4637503 (1987-01-01), Vohl
patent: 0 348 270 (1989-12-01), None
patent: 1 256 478 (2002-11-01), None

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