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:
Oct. 29, 2002
Filed:
Oct. 16, 2001
Wayne Hewitt, LaPorte, IN (US);
Robert Bosch Corporation, Broadview, IL (US);
Abstract
A brake booster ( ) having a valve body ( ) for retaining a plunger ( ) of a control valve assembly ( ). The plunger ( ) is being connected by an input rod ( ) to a brake pedal through which and operator supplies an input force to effect a brake application. To effect a brake application, the input rod ( ) moves the plunger ( ) to control communication of a source of pressure between a first chamber and a second chamber ( ) and create a pressure differential across a wall ( ) for developing an output force. The input rod ( ) is characterized by a cylindrical tube ( ) having a first end ( ) and a second end ( ) with an external annular rib ( ) located between the first end ( ) and the second end ( ). A first internal annular groove ( ) located between the annular rib ( ) and the first end ( ) and a second internal groove ( ) is located adjacent the first end ( ) to define a socket ( ). A plurality of slits ( ) in the cylindrical tube ( ) extend from the first end ( ) toward the first internal annular groove ( ) to define a plurality of resilient fingers ( ). A semi-spherical ball surface ( ) on the plunger ( ) is pushed into the socket ( ) to fix or secure the input rod ( ) to the plunger ( ) and provide for a linearly transfer of input force from the brake pedal directly to plunger ( ) through the cylindrical tube ( ) to effect a brake application.