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. 14, 2017
Filed:
Jul. 31, 2014
Trane International Inc., Piscataway, NJ (US);
Jerry Allen Rood, Onalaska, WI (US);
Michael Gerard Benco, Onalaska, WI (US);
Scott Joseph Smerud, La Crosse, WI (US);
John Robert Sauls, La Crosse, WI (US);
Rodney Lakowske, La Crosse, WI (US);
TRANE INTERNATIONAL INC., Davidson, NC (US);
Abstract
An oil lubrication system for a multi-stage compressor separates oil from a refrigerant at an intermediate pressure following the first stage of compression and then routes the separated oil at the intermediate pressure to the compressor suction cavity bearings at the intermediate pressure, thus avoiding further compression of oil in subsequent stages of compression. The efficiency of the multi-stage compressor can be increased by not raising the pressure of the oil through the subsequent stages of compression.