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. 02, 1985
Filed:
Feb. 18, 1983
Peter Szcupak, Park Ridge, IL (US);
Chicago Rawhide Manufacturing Company, Elgin, IL (US);
Abstract
A seal unit having a casing portion and an elastomeric seal body bonded thereto, with the seal body including an excluder lip, a primary liquid seal lip and a separate gas or vapor sealing lip. The primary and secondary lips insure against leakage in both the static and dynamic conditions of the seal. While gas or vapor sealing lip is seated against the valve body of an associated mechanism. The gas or vapor lip in effect provides a relief valve action and is able to be urged into a position of engagement with another part of an associated machine member by its own inherent resiliency. The relief valve bleeds gas and liquid in one direction but not in the opposite direction.