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:
Aug. 24, 1993
Filed:
Jun. 18, 1992
Clifford R Worsley, Langenfeld, DE;
Goetze AG, Burscheid, DE;
Abstract
A valve stem seal assembly for installation about a valve stem surrounded by a valve guide includes a sleeve-like elastomer body having the following four components: (1) an annular, outer, oil-sealing lip for sealingly surrounding the valve stem in the installed state of the seal assembly; (2) an annular, inner, gas-sealing lip for sealingly surrounding the valve stem in the installed state of the seal assembly; (3) a diaphragm situated axially between the oil-sealing lip and the gas-sealing lip and being connected to the oil-sealing lip; and (4) a generally cylindrical mounting part for surrounding and engaging the valve guide in the installed state of the seal assembly. The gas-sealing lip is directly connected with the mounting part externally of a region of the diaphragm. The seal assembly further has a rigid housing surrounding and contacting the mounting part; and a pressure-stable zone between the gas-sealing lip and the diaphragm for separating the oil-sealing lip from the gas-sealing lip with respect to vibrations.