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:
Jun. 30, 1998
Filed:
Apr. 01, 1996
Applicant:
Inventors:
Masao Tateno, Tochigi-ken, JP;
Koji Tomita, Tochigi-ken, JP;
Assignee:
Tochigi Fuji Sangyo Kabushiki Kaisha, Tochigi-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01C / ;
U.S. Cl.
CPC ...
4182065 ;
Abstract
There are provided male and female rotors, which engage with each other at screw-shaped tooth trace portions formed on the rotor bodies; a compressor casing which houses these rotors and has a suction port on one side in the axial direction and a discharge port on the other side in the axial direction; hollow portions which are provided in the tooth trace portions of the male screw rotor and communicate with the suction port; and partition walls which are provided at the end on the discharge port side of the tooth trace portions and block the hollow portions.