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:
Dec. 14, 2004
Filed:
Nov. 15, 2002
Masato Wake, South Bend, IN (US);
Robert Bosch Corporation, Broadview, IL (US);
Abstract
A brake booster ( ) having a housing defined by joining a substantially circular first shell ( ) to a second shell ( ) to compress a first bead ( ) on a diaphragm ( ) secured to a movable wall ( ) and seal an interior thereof from the surrounding environment. The movable wall ( ) includes a hub ( ) with a disc ( ) having an annular groove ( ) located adjacent a peripheral surface ( ) for receiving a second bead ( ) on the diaphragm ( ). The diaphragm ( ) is characterized by a resulting cylindrical body ( ) with a first section ( ) that transitions from the first bead ( ) and a second section ( ) that transitions from the second bead ( ). The first ( ) and second ( ) beads each have an initial oval shape that is stretched into a circular shape for respective retention between the first ( ) and second ( ) shells and annular groove ( ) in sealing a front chamber ( ) from a rear chamber ( ).