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:
Nov. 19, 1996
Filed:
Jun. 30, 1995
John A Burke, Rocky River, OH (US);
Greene, Tweed of Delaware, Inc., Wilmington, DE (US);
Abstract
An improved fluid pressure activated piston return spring seal element is installed in a piston housing annular groove having first and second radial side walls, an axial base wall, and a mouth. The element is annular, formed of an elastomeric material, and has an axis, first and second radial faces, and an axial face. The first radial face faces toward the first side wall, defines an inwardly extending crotch region, and includes a base wall pressure sealing lip. The axial face faces toward and protrudes through the groove mouth and includes a piston pressure sealing lip and first and second angled surfaces. The element has a body portion, a first branch extending axially from the body portion toward the first radial face and having the piston pressure sealing lip, a second branch extending axially from the body portion toward the first radial face and having the base wall pressure sealing lip, and a third branch extending radially from the first branch end toward the second branch end and defining a portion of the first radial face. The body portion and the first, second, and third branches define the crotch region.