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:
Oct. 01, 1996
Filed:
Jul. 06, 1995
Applicant:
Inventors:
Assignee:
Nippon Oil Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ;
U.S. Cl.
CPC ...
508421 ; 508433 ; 508562 ;
Abstract
A hydraulic working oil composition for buffers which comprises a lubricating oil as a base oil, (A) a phosphoric acid ester such as dioleyl acid phosphate and/or a phosphorous acid ester such as dioleyl hydrogen phophite, and (B) an adduct of an aliphatic amine such as oleyl amine with an alkylene oxide such as ethylene oxide, the compounds (A) and (B) being the essential components added to said base oil; and, in one embodiment, a process for lubricating buffers which comprises adding said compounds (A) and (B) to said base oil to prepare a hydraulic working oil composition and using the thus prepared oil composition in buffers.