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:
Jun. 29, 2004
Filed:
Aug. 21, 2002
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A negative pressure type booster, comprising a valve seat member ( ), a spring ( ) energizing the valve seat member ( ), and a holding member ( ) having an engaging part ( ) disposed on a power piston ( ) movably only in radial direction and engaged with the valve seat member ( ) and a tapered part ( ) in contact with a plunger ( ), whereby, when the amount of movement of an input member ( ) relative to the power piston ( ) is larger than a specified value, the input member ( ) is brought into contact with the tapered part ( ) and moves the holding member ( ) in radial direction to disengage the holding member ( ) from the valve seat member ( ) in order to allow the valve seat member ( ) to be moved rearwards.