Hydraulic actuation device in motor vehicles

Details Hydraulic actuation device in motor vehicles Hydraulic actuation device in motor vehicles

2005-02-15

2005-02-15

Siconolf, Robert A. (Department: 3683)

Power plants

Pressure fluid source and motor

Pulsator

Reexamination Certificate

active

06854271

ABSTRACT:
A pressure cylinder for a hydraulic actuation device in motor vehicles includes a housing (1) with an internal cylinder (2,3). A piston (6) is displaceable in the internal cylinder for forming a pressure space (12) for a hydraulic fluid. The piston includes a hemispherical socket (10) in an indentation (9). A spring (18) is arranged in the pressure space (12), and a tappet (7) is connected by a transmission part with a hemispherical cap (8). The tappet (7) is in a frictional and swivelable engagement in the socket (10) in an indentation (9) by the force of the spring (18). The piston is a deep-drawn, cup-shaped part and includes a filling piece (13) in the interior of the piston (6). An annular space (15) is disposed at a piston surface (14) facing toward the pressure space (12). The annular space (15) is for receiving the spring (18) in a compressed state when the piston (6) is in a top dead center position.

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