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:
May. 07, 2013
Filed:
Jun. 25, 2009
Yasushi Amano, Takasago, JP;
Yasushi Amano, Takasago, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
A screw compressor () is provided with shaft seal sections () located on opposite sides of a compression chamber () of a screw rotor (), to prevent mixing of oil in bearings () into the compression chamber () and leakage of process gas from the compression chamber (). A suction-opening return line () interconnects the shaft seal section () on the discharge side of the compression chamber () and a suction opening () of the compressor body (). A supply-process-gas communicating line () interconnects the suction opening () of the compressor body () and the upper part of the oil supply tank (), and a shaft seal section () divides the inside of the compressor body () and an atmospheric environment.