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:
Jul. 14, 1992
Filed:
Dec. 16, 1991
Daniel R Cuatt, Henrietta, NY (US);
Mark A Shost, Henrietta, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A self-contained lash adjuster includes a closed end cylinder body and a plunger in the cylinder defining a pressure chamber at the closed end of the cylinder and an internal reservoir connected with the chamber by a one-way passage in the plunger. A diaphragm sealing the reservoir is loaded by a spring piston to pressurize the reservoir and apply a differential pressure extending force to the plunger. The plunger is preferably made in two parts with the diaphragm in the lower part defining the chamber and the piston in the upper part distal from the chamber. The two-part construction permits leakdown testing before permanent installation of the diaphragm. A seal in the lower part beyond a return port seals the plunger walls to the cylinder. Installation during assembly of excess fluid for make-up is controlled by positioning of the plunger lower part during filling in a hyper extended position beyond the fully extended position to which the plunger is limited after full assembly of the lash adjuster.