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. 13, 2003
Filed:
Nov. 20, 2001
Stanislaw Bodzak, Elsbethen, AT;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A device for supplying liquids, in particular, fuel, has a first geared supply pump ( ) with a pair of meshed gear wheels ( ) in a pump chamber, of which one is rotatably driven by means of a drive shaft ( ). In the pump chamber ( ), an inlet opens on a suction side ( ) and an outlet ( ) opens on a pressure side ( ). In the direction of rotational axes ( ) of the gear wheels ( ) of the first supply pump ( ), a second geared supply pump ( ) is provided, which has a meshed pair of gear wheels ( ) in a pump chamber ( ). One of the gear wheels ( ) of the second supply pump ( ) is rotatably and lockingly connectable to the drive shaft ( ) by means of a coupling arrangement ( ). The coupling arrangement ( ) is controlled by the existing pressure on the pressure side ( ) of the first geared supply pump ( ). In this manner, with a low pressure, the gear wheel ( ) is rotatably and interlockingly coupled to the drive shaft ( ) and with a high pressure, the gear wheel ( ) is separated from the drive shaft ( ). Thus, with a lower pressure, both pumps supply fuel, and with a higher pressure, only the first pump supplies the fuel.