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:
Oct. 14, 1997
Filed:
Oct. 02, 1996
Applicant:
Inventor:
Leslie J Sell, Bothell, WA (US);
Assignee:
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 29 ; 277215 ; 91 51 ; 92240 ;
Abstract
A venting piston ring is provided with ports extending partly through the ring outer surface which cooperate with the end edge of a cylinder wall to vent the cylinder volume while intermediate surface lands between ports maintain ring to cylinder contact and alignment.