Patent · US Active

Washer pump

US8348606B2 · kind B2 · utility

8Cited by

2References

17Claims

0Family size

Assignee

Bowles Fluidics Corporation · US

Inventors

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

Key dates

Filing date	Jun 9, 2009
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Jan 29, 2031

Classification

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

Abstract

An enhanced pump assembly includes an impeller and volute casing designed to provide high operating pressures (“P”) and flow rates (“Q”) with low energy usage. The impeller has a central shaft carrying radially projecting curved primary vanes, and each primary vane also has a twist in the radial direction. Secondary impeller vanes define triangular connecting fillet-like wall segments connecting each primary vane to the impeller shaft. The casing of the pump has a slight spiral deviation so that the pump chamber's radial sidewall flares away from the swept area of the impeller's vanes to define a fluid outlet that contributes to higher P-Q performance, especially when pumping colder fluids.

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