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:
Mar. 26, 1985
Filed:
May. 06, 1983
Applicant:
Inventor:
Walter Mittermeier, Tamm, DE;
Assignee:
Dr. Ing. h.c.F. Porsche A.G., Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
474110 ; 474111 ;
Abstract
A hydraulic chain tightener with a hollow piston longitudinally movably guided within a hydraulic housing; the hollow piston is closed off at the top by a throttling plug and the hydraulic housing is to be vented by way of the channels of the throttling plug; an expansion space is formed between the throttling plug and the pressure space present at the bottom side of the hollow piston, which is closed off with respect to the pressure space by a ball check valve; during chain impacts on the hollow piston and corresponding pressure increases in the pressure space, the check valve opens and enables by pump action a rapid venting of the hydraulic housing.