The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 1991
Filed:
Oct. 29, 1990
Keith V Leigh-Monstevens, Rochester Hills, MI (US);
Julie A Hartig, Waterford, MI (US);
Automotive Products plc, Warwickshire, GB;
Abstract
A damper for use with a hydraulic clutch actuator of the type including a master cylinder and a slave cylinder with a conduit interconnecting the outlet of the master cylinder and the inlet of the slave cylinder. The damper is positioned in the conduit between the master cylinder and slave cylinder and includes a diaphragm having a front face constituting a barrier wall of the hydraulic system so that the diaphragm can deflect in response to vibrations transmitted through the hydraulic fluid in the system to effect damping of the vibration and further includes a structure confronting but spaced from the rear face of the central region of the diaphragm which operates to limit the deflection of the central region of the diaphragm to a predetermined maximum magnitude to limit the stress at the center of the diaphragm to an acceptable level and thereby improve the fatigue life of the diaphragm. The limiting structure may comprise an upset portion on the cover; an elastomeric button on the inner face of the cover; a Belleville spring between the rear face of the diaphragm and the inside face of the cover; or a suitable liquid in the space between the rear face of the diaphragm and the inner face of the cover. The space between the limiting structure and the rear face of the diaphragm may be selectively varied to accommodate hydraulic control systems of varying hydraulic characteristics.