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:
Mar. 25, 2003
Filed:
Nov. 20, 2001
Stanislaw Bodzak, Elsbethen, AT;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A device for supplying liquids, particularly fuel, has a first drive shaft ( ) and a supply pump ( ) having at least one supply member ( ) coupled to a second drive shaft ( ), whereby the first drive shaft ( ) drives the second drive shaft ( ) via a drive unit ( ). The drive unit ( ) is preferably a tapered ring drive, which has a first frictional bevel gear ( ) connected to the first drive shaft ( ) and a second frictional bevel gear ( ) connected to the second drive shaft ( ), whereby the first and second friction bevel gears ( ) roll off one another by a tapered ring ( ) disposed between the two bevel gears. The tapered ring ( ) is movable for changing the gear ratio of the gear unit ( ) as a function of the supply pressure produced by the supply pump ( ). In this manner, with a lower supply pressure, a large gear ratio of the gear unit ( ) is determined, and with an increased supply pressure, a smaller gear ratio of the gear unit ( ) is determined. Thus, with a low rotational speed of the supply pump ( ) which produces a low supply pressure, the gear ratio of the gear unit is made larger, and correspondingly, the supply volume and the supply pressure is increased.