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. 23, 1976
Filed:
Dec. 09, 1974
Applicant:
Inventor:
Keisuke Kasahara, Tokyo, JA;
Assignee:
Kabushiki Kaisha Maekawa Seisakusho, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62469 ; 62473 ; 62510 ; 418 97 ;
Abstract
A method of prevention of overheating of an electric motor for a compressor comprising the steps of introducing into the case of the electric motor of the closed type for driving the screw compressor part of the refrigerant which is introduced into an evaporator so as to cause said part of the refrigerant to expand directly therein, and permitting the expanded gas which has absorbed heat to be drawn by suction into a screw blade groove space of the screw compressor in a position in which the screw blades of the screw compressor is meshing engagement with one another have sealed gas.