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:
Apr. 23, 1996
Filed:
Feb. 22, 1995
Edward A Hantle, deceased, late of Caro, MI (US);
Orrin A Woodward, Davison, MI (US);
David E Harris, Frankenmuth, MI (US);
John G Fischer, Goodrich, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An open-vane regenerative turbine pump in an electric fuel pump operating submerged in fuel in a fuel tank of a motor vehicle. The regenerative turbine pump includes an open-vane impeller having paddle-like vanes extending radially out from a ring-shaped body of the impeller, an annular groove in a housing of the pump defining a pump channel around the periphery of the impeller and the vanes, a stripper on the pump housing fitting close around the impeller between an inlet port of the pump channel and a discharge port of the pump channel, a pair of radial vapor ports on opposite sides of the impeller at an inside diameter of the annular pump channel, and a pair of steps on opposite sidewalls of the pump channel sweeping downstream from an outside diameter of the pump channel to the inside diameter thereof at downstream sides of corresponding ones of the radial vapor ports. The swept-back steps on the sidewalls of the pump channel gradually reduce the cross sectional area of the pump channel to increase flow velocity in the pump channel ahead of the vapor ports for more thorough scavenging of vapor.