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. 21, 1978
Filed:
Mar. 10, 1977
Applicant:
Inventor:
Ward Sievenpiper, Milgrove, NY (US);
Assignee:
A-T-O Inc., Willoughby, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F / ; F16J / ;
U.S. Cl.
CPC ...
277165 ; 277166 ; 2771895 ; 2772 / ; 267-15 ; 92256 ;
Abstract
A piston and cylinder device wherein the piston comprises an annular metal core with a peripheral groove for receiving an annular seal. The metal core has a peripheral overlay of nylon which provides a bearing surface at each side of the peripheral groove and the overlay follows the contour of the periphery of the metal core including the walls of the peripheral seal receiving groove.