Patent · US Expired

Master cylinder

US5987887A · kind A · utility

1Cited by

5References

16Claims

0Family size

Assignee

LuK GmbH & Co. · DE

Inventors

Gerhard Prosch · Edenkoben, DE
Christian Sperner · Edenkoben, DE
Dieter Adler · Herzogenaurach, DE
Peter Schaaf · Neustadt an der Aisch, DE

Key dates

Filing date	Feb 17, 1998
Grant date	Nov 23, 1999
Priority date	—
Expiry date	Feb 17, 2018

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2025/081
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A master cylinder for a hydraulic friction clutch, said master cylinder being connected to a physically actuatable pedal by a piston rod (17) which is articulated in semi-shells (14) enclosed in a piston skirt bushing (10), an end of said piston skirt bushing (10) remote from the piston rod (17) being connected to a piston (7) which is longitudinally displaceable in a guide sleeve (96) of the master cylinder (1), an end face of said piston (7) delimiting a pressure chamber (8) wherein the semi-shells (14) fill an inner space of the piston skirt bushing (10) without play and comprise a cup-shaped recess (15) in which a ball head (16) of the piston rod (17) is retained by positive locking, the piston skirt bushing (10) forming a structural unit with the radially stepped piston (7).

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