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:
Mar. 05, 1985
Filed:
Oct. 15, 1982
Applicant:
Inventors:
Yozo Hibino, Ibaraki, JP;
Sakae Yamada, Ibaraki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415 17 ; 415 47 ;
Abstract
A monitoring system for a screw compressor for checking the operating conditions of the screw compressor by opening and closing a suction throttle valve located on the suction side of the screw compressor and an air discharge valve located on the discharge side thereof to thereby effect on-off control of the flow rate of the discharged air, wherein the operating conditions of components of the screw compressor are checked both in on-load and unloaded conditions by comparing values of the suction pressure, discharge pressure and discharged air temperature of the screw compressor with respective preset values.