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:
Sep. 04, 1990
Filed:
Aug. 28, 1989
Applicant:
Inventors:
Assignee:
Aisin Seiki Kabushiki Kaisha, , JP;
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
137568 ; 60413 ; 138 31 ;
Abstract
A hydraulic accumulator for vehicle transmission includes a valve body incorporated into the transmission casing, a piston disposed in a space provided in the valve body and dividing the space into first and second pressure chambers and a cylindrical sleeve member for closing the space. The sleeve member includes a cylindrical portion formed integral with a cover portion for slidable engagement with the piston. The thickness of the cylindrical portion is variable and permits the changing of the effective area difference between the opposite sides of the piston so that desired pressure characteristics can be obtained.