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:
Aug. 05, 2003
Filed:
Nov. 30, 2001
William H. Zebuhr, Nashua, NH (US);
Ovation Products Corporation, Nashua, NH (US);
Abstract
A reciprocating compressor ( ) includes two pistons ( and ) driven in opposite directions in a piston chamber ( ). As a piston is driven in the downstream, compression-stroke direction, pressure causes a piston ring ( or ) that seals against the piston-chamber wall to seal against the piston, too, and thereby prevent fluid flow from the piston's downstream side to its upstream side. When the piston is driven downstream, on the other hand, pressure keeps the piston ring spaced from the piston and thereby allows flow from the piston's upstream side to its downstream side. The piston rings thus act as check valves.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile