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. 15, 1990
Filed:
Nov. 17, 1988
Kouhei Harada, Nagoya, JP;
Hiromi Hasegawa, Obu, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
An oil pressure clutch mechanism of an automatic transmission is comprised of at least two clutches interposed coaxially in a front drum. An oil circuit for controlling the clutches is formed in the front drum in relation to an oil circuit in an oil pump cover. The oil circuit includes circular oil grooves formed between an outer face of the oil pump cover and an inner face of the drum. A circular drain groove is disposed axially between the circular oil grooves to receive oil leaked therefrom. A drain passage is formed in the front drum for conducting leaked oil from the drain groove to a location external of the front drum. The outlet end of the drain groove is spaced farther from the axis than is the inlet end thereof, whereby leaked oil is discharged through the oil drain passage under the influence of centrifugal force.