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:
Aug. 24, 1999
Filed:
Jan. 31, 1997
Kenji Hayashi, Toyoake, JP;
Kazuhiko Suzuki, Kariya, JP;
Satoshi Kawasumi, Takahama, JP;
Yuzuru Sugiura, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A tandem vacuum servo unit includes a movable power piston having a supporting portion and a front movable wall member having a first engaging portion for engaging the movable power piston. The first engaging portion has an input side face that engages the output side face of the supporting portion along a first contacting portion. A rear movable wall member has a second engaging portion whose input side face engages the output side face of the first engaging portion along a second contacting portion. The first contacting portion is spaced radially outwardly of the second contacting portion. This construction of the vacuum servo unit increases the durability of the front movable wall member.