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:
May. 14, 1991
Filed:
Jul. 18, 1989
Hiromi Taguchi, Kanagawa, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
An oil passage structure in a transmission casing of an automotive automatic transmission, comprises, at an outer peripheral abutting surface between the transmission casing and the oil pump cover, an opening defined in the transmission casing which is exposed to the abutting surface of the transmission casing and is communicated with the inlet port of the valve assembly provided in the bottom section of the transmission through a single vertical oil channel formed in the transmission casing by machining to provide the shortest distance between the inlet port of the valve assembly and the opening. The oil passage structure also comprises an oil groove which is integrally formed on the abutting surface by die-casting and includes a point connecting the outlet port of the oil pump through an oil passage defined in the oil pump cover, to intercommunicate the opening and the connecting point.