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:
Sep. 22, 1992
Filed:
Feb. 04, 1991
Applicant:
Inventors:
Charles H Tuckey, Cass City, MI (US);
J D Tuckey, Cass City, MI (US);
Assignee:
Walbro Corporation, Cass City, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417205 ; 4174231 ; 4174239 ; 415 556 ; 415 557 ;
Abstract
A two-stage fuel pump for furnishing fuel to an internal combustion engine utilizes a side or lateral channel pump as a first stage pump to furnish liquid fuel to a second stage pump. A common armature drive shaft drives both pumps and central passages in the vicinity of the drive shaft receive vapor developed in the first stage pump and cause the vapor to exit the pump assembly. A conical baffle directs vapor free fuel to a periphery where it enters the inlet side of the second or main stage pump. A rotor in the first stage pump has central axial passages to facilitate the egress of vapor from the pump assembly.