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. 08, 1999
Filed:
Jun. 20, 1997
Kenichi Takahashi, Ryugasaki, JP;
Hiroyuki Matsuno, Haramachi, JP;
Hiroyasu Obata, Zama, JP;
Megumi Kawai, Ebina, JP;
Hitachi Techno Engineering Co., Ltd., Tokyo, JP;
Abstract
A method of adjusting the engaged clearance between rotors of a screw compressor which has a male rotor and a female rotor inside a casing, both of the rotors being rotated while maintaining a required very small clearance using timing gears fixed individually to the rotors through shrink fitting, wherein the very small clearance between the rotors is set to a required value by loosening the shrink fitting between one of the timing gears and the rotor on which the one of the timing gears is mounted, while movement of the other of the timing gears is being restricted; and intermittently applying torques to the rotor on which the one of the timing gears is mounted using a servo motor. In this way, it is possible to obtain a screw compressor in which a very small clearance between the rotors can be set to a required value in a short time, and in which high reliability in the symmetrizing adjustment and a high compressing performance can be obtained.