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. 14, 1996
Filed:
Feb. 15, 1995
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle has a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller. A hydraulic buffer is formed between the impeller and the end walls of the pump chamber and includes recesses provided in a structure selected from the axial end surface of the impeller and the end walls of the pump chamber, so that the recesses are fillable with fuel during operation of the feeding pump and form the hydraulic buffer which acts in an axial direction of the impeller and stabilizes the impeller. An outer ring which connects the vanes of the impeller at their radially outer ends and limits the impeller in a peripheral direction. The recesses are arranged in a region of the outer ring.