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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.:

US 10183657 B1

PDFFull Text
Date of Patent:
Jan. 22, 2019

Filed:

Jan. 29, 2014

Master cylinder

Applicant:

Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;

Inventors:

Sadatomo Matsumura, Yokohama, JP;

Yoichi Kumemura, Yokohama, JP;

Assignee:

Hitachi Automotive Systems, Ltd., Ibaraki, JP;

Attorney:

Mattingly & Malur, PC

Primary Examiner:

F Daniel Lopez

Assistant Examiner:

Matthew Wiblin

Int. Cl.
CPC ...
B60T 11/236 (2006.01); B60T 11/232 (2006.01); B60T 11/20 (2006.01); F16J 15/18 (2006.01); F16J 15/32 (2016.01); F16J 1/00 (2006.01); F16J 15/16 (2006.01);
U.S. Cl.
CPC ...
B60T 11/236 (2013.01); B60T 11/20 (2013.01); B60T 11/232 (2013.01); F16J 1/001 (2013.01); F16J 15/16 (2013.01); F16J 15/18 (2013.01); F16J 15/32 (2013.01);
Abstract

A master cylinder includes a piston seal installed in a circumferential groove. The piston seal includes an annular base section, an inner circumferential lip section protruding from an inner circumferential side of the base section to come in sliding contact with an outer circumferential surface of a piston, an outer circumferential lip section protruding from an outer circumferential side of the base section to abut the circumferential groove, and an intermediate protrusion section protruding from between the inner circumferential lip section and the outer circumferential lip section of the base section to a forward side of the outer circumferential lip section. A step difference section is formed at the outer circumferential side. The circumferential groove has a step section that always abuts an outer circumferential surface of the step difference section. A communication path configured to bring a supply path that is in communication with a reservoir and the bottom section side of the circumferential groove in communication with each other is formed between the step difference section and the step section.

Find Patent Forward Citations

Matsumura, Sadatomo. (2019). Master cylinder (U.S. Patent No. 10183657). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10183657

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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