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. 23, 2004
Filed:
Dec. 07, 2001
Jeffrey A. Schultz, Pittsville, VA (US);
Scott M. Scarborough, Altavista, VA (US);
Schrader-Bridgeport International, Buffalo Grove, IL (US);
Abstract
A valve assembly includes a valve body having a passageway and first and second oppositely facing valve seats that extend around the passageway. First and second valve elements are positioned in the passageway to seal against the respective valve seats, and a spring biases the first valve element to the closed position against the first valve seat. The valve seats are spaced sufficiently closely together along the passageway that the first valve element, when positioned against the first valve seat, holds the second valve element away from the second valve seat. For this reason, the spring also biases the second valve element away from the second valve seat.