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:
Dec. 19, 1978
Filed:
Feb. 09, 1977
Applicant:
Inventor:
Kiyoshi Usami, Ohbu, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ; B60H / ; F16K / ; F16K / ;
U.S. Cl.
CPC ...
62217 ; 62239 ; 137494 ; 13750513 ;
Abstract
In a refrigeration cycle of an air conditioning system of the type, in which lubricating oil for lubricating a compressor circulates through the refrigeration cycle together with refrigerant, an evaporation pressure control device is provided between an evaporator and the compressor for not only controlling the amount of refrigerant circulating through the refrigeration cycle in response to the pressure of the refrigerant out of the evaporator, but permitting the refrigerant to return to the compressor when the pressure of the refrigerant out of the evaporator is extremely decreased owing to the leakage of the refrigerant, whereby seizure of the compressor can be prevented.