Patent · US Expired

Piston arrangement of a hydraulic actuating device on motor vehicles

US7188563B2 · kind B2 · utility

8Cited by

8References

10Claims

0Family size

Assignee

FTE automotive GmbH · DE

Inventors

Dirk Liebig · Ebern, DE
Stefan Gebert · Gestungshausen, DE
Christian Sperber · Ebern, DE
Harry STEINMETZ · Ebern, DE

Key dates

Filing date	Oct 28, 2005
Grant date	Mar 13, 2007
Priority date	—
Expiry date	Oct 28, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T403/32786
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.