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:
Feb. 02, 1999
Filed:
Jul. 14, 1997
Applicant:
Inventors:
Christopher E Domanski, Petersburg, MI (US);
William H Houtman, Ann Arbor, MI (US);
Benjamin Ziph, Ann Arbor, MI (US);
Assignee:
STM, Corporation, Ann Arbor, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F01B / ;
U.S. Cl.
CPC ...
092177 ; 92192 ; 92194 ; 92242 ; 92247 ; 60517 ;
Abstract
A piston assembly for a double-acting engine such as a double-acting Stirling engine. A pair of sealing rings located on opposite sides of a sealing washer are positioned between a base section and a dome section of a piston head. These sealing rings are alternatively urged into sealing engagement with the cylinder bore as the piston reciprocates. A single sealing ring design is also disclosed in which the sealing ring is urged into constant sealing engagement by positive pressure accumulated with an interior cavity in the piston head.