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:
Nov. 11, 2008
Filed:
Dec. 12, 2006
Applicants:
Yoji Inoue, Toyoake, JP;
Masaki Nakagawa, Handa, JP;
Inventors:
Yoji Inoue, Toyoake, JP;
Masaki Nakagawa, Handa, JP;
Assignee:
Advics Co., Ltd., Kariya, Aichi-Pref., JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 9/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A valve pistonof a vacuum type booster device is provided with a bypass passagewhich is defined between a sound-absorbing memberand an input rodto communicate directly with the atmosphere and a sliding-type plate valvecomposed of three plate valve partswhich are arranged around the input rodto be relatively slidable in radial directions. When the input rodis advanced beyond a predetermined distance relative to the valve piston, the sliding-type plate valveis separated between two of the plate valve partsto make the bypass passagecommunicate with the inside of the valve piston