Piston arrangement of a hydraulic actuating device on motor...

Details Piston arrangement of a hydraulic actuating device on motor... Piston arrangement of a hydraulic actuating device on motor...

2007-03-13

2007-03-13

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

Piston

With separable means for pivotally mounting connecting rod...

C092S128000, C403S141000

Reexamination Certificate

active

11261353

ABSTRACT:
A piston arrangement for master and/or slave cylinders of a hydraulic actuating device for clutch and/or brake systems on motor vehicles is disclosed. An insert is inserted into a recess of the piston up to a first stop, the insert having a ball seat and an expandable insertion sleeve which is undercut with respect to the ball seat and protrudes with its expandable region. A ram is pushed into the sleeve with its ball end until it snaps into the ball seat. As the ram is further pressed axially, the insert slides over the first stop, is firmly pressed into a narrow hole section of the recess and strikes a second stop at the inner end of the recess. The insertion sleeve is then tightly enclosed by the piston wall and can no longer expand even in the event of very high pull-out forces, i.e. cannot release the ball end of the ram.

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