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:
May. 31, 2005
Filed:
Apr. 29, 2003
Jean-charles Maligne, Aubervilliers, FR;
Stéphane Lacroix, Tournan en Brie, FR;
Philippe Richard, Chelles, FR;
Ulysse Verbo, Aulnay-sous-Bois, FR;
Jean-Charles Maligne, Aubervilliers, FR;
Stéphane Lacroix, Tournan en Brie, FR;
Philippe Richard, Chelles, FR;
Ulysse Verbo, Aulnay-sous-Bois, FR;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A pneumatic brake booster for a motor vehicle, of the type in which the movements of a control rod () are able to determine the openings and closings of at least one axial intake valve () which is inserted between a pressure source subjected to the pressure (P) higher than the first pressure (P) and a rear chamber () of the booster, and of at least one axial equalizing valve () which is inserted between a front chamber () and the rear chamber (), to actuate a moving partition () inserted between the front chamber () and the rear chamber (), characterized in that it comprises a tubular element () of which axially offset transverse faces () comprise first elements () for sealing the axial intake and equalizing valves () and that the control rod () is able to operate via two concentric springs () having different stiffnesses.