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:
May. 08, 1990
Filed:
Feb. 14, 1989
James E Blomquist, Grafton, WI (US);
Robert M Larson, Mequon, WI (US);
Kelch Corp., Cedarburg, WI (US);
Abstract
A bi-directional vent for a fuel tank utilizes a resilient sealing member which in its unflexed state is a simple resilient washer. The sealing member is disposed inside a vent body, and forms both an inner and outer seal. The inner seal is formed between an inner circumferential edge on a central hole in the washer and a conical sealing surface attached to the vent body. The outer seal is formed between an outer annular sealing surface on the washer and a circumferential edge formed on a central opening in the vent body. Increased pressure in the tank causes the sealing member to deflect at its inner portion away from the circumferential edge on the vent body, resulting in outward venting. Reduced pressure in the tank causes the outer part of the sealing member to deflect away from the conical seating surface, resulting in inward venting.