Patent · US Active

Washer pump

US8684686B2 · kind B2 · utility

4Cited by

2References

13Claims

0Family size

Assignee

Bowles Fluidics Corporation · US

Inventors

Shridhar Gopalan · Westminster, US
Alan Romack · Columbia, US
Chunling Zhao · Columbia, US

Key dates

Filing date	Oct 26, 2012
Grant date	Apr 1, 2014
Priority date	—
Expiry date	Oct 26, 2032

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/426
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An improved automotive pump assembly includes a volute pumping chamber configured to operably contain a rotatable impeller which, when driven, draws fluid into a fluid inlet and pumps the fluid to and through a fluid outlet. The volute chamber has an exterior sidewall with a constant internal first radius over a first sidewall portion and transitions to a second sidewall portion of increasing radius. The chamber's second sidewall portion defines a first end at a sidewall transition point tangent to the constant radius sidewall segment to define a second end which is tangent to the volute chamber's fluid outlet with a second radius that is greater than the first radius.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.