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. 03, 1985
Filed:
Jan. 30, 1984
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A fuel pump comprises a regenerative pump section, a driving section and a housing, the regenerative pump section being provided with a vapor vent for discharging fuel vapor. The vapor vent communicates with an outside of the fuel pump through a vent housing for a vortex flow. The vent housing has a vent chamber, a tangential groove and a discharge hole. A vortex flow of the fuel including the fuel vapor generates in the vent chamber and flows from the tangential groove to the discharge hole. When the fuel vapor does not generate, the vortex phenomenon is enhanced so that an amount of the fuel discharged from the discharge hole is reduced. The vent housing may have a radial control groove communicating with a control hole in addition to the tangential groove.