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. 18, 1997
Filed:
Mar. 08, 1996
Applicant:
Inventors:
Akira Matuo, Yokohama, JP;
Takeshi Kaneko, Yokohama, JP;
Assignee:
Nabco Limited, Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
9137 / ;
Abstract
A brake booster having separately formed valve bodies for the vacuum valve and the atmospheric valve, which minimizes an invalid portion of the operation stroke. There is provided a cylindrical inner member 800 air-tightly and slidably fitted in the internal bore of a hub portion 52 of a servo piston 50. The inner member 800 is biased backwardly by a spring 850. The inner member 800 has at its front end a valve body 510 of the vacuum valve 500. The rear end of the inner member 800 is caused to be abutted with the atmospheric air valve body 710 side of the atmospheric air valve 700 under the effect of force of the spring 850.