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:
Apr. 28, 1992
Filed:
Aug. 21, 1991
Applicant:
Inventors:
Klaus Dohring, Gorxheimertal, DE;
Volker Budde, Grosskarlbach, DE;
Assignee:
Firma Carl Freudenberg, Weinheim/Bergstr., DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
123 9055 ; 123 9058 ; 74569 ;
Abstract
A hydraulic valve-clearance compensating element for internal combustion engines in which an internal valve stem is capable of being axially shifted relative to an external stem such that, together with the latter, it delimits an oil-filled storage chamber. The volume of the storage chamber may be altered and is sealed to the outside by a gasket. At least one compressible displacement member is included in the storage chamber to offset changes in volume. This displacement member is made of a closed-celled soft foam with a non-porous surface layer.