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:
Mar. 14, 2000
Filed:
Mar. 16, 1998
Takato Ogiwara, Yamanashi-ken, JP;
Kenji Sano, Yamanashi-ken, JP;
Tokico Ltd., Kawasaki, JP;
Abstract
In the master cylinder of the present invention, a cylindrical portion of a grommet seal includes at least two outer sealing projections on an outer circumferential surface thereof, an inner sealing projection on an inner circumferential surface thereof at a position corresponding to a recess between the outer sealing projections, and an abutting portion adapted to abut against a positioning stepped portion provided in a supply fitting of a reservoir. When the supply fitting is inserted into the grommet seal fitted in a boss of a cylinder body, deformation of the inner sealing projection is relieved by a cavity constituted by the recess between the outer sealing projections. When a hydraulic pressure is applied to the cylindrical portion of the grommet seal, because the abutting portion of the grommet seal abuts against the positioning stepped portion of the supply fitting of the reservoir, the cylindrical portion is axially compressed, so that sealability of the sealing projections can be improved.