Patent · US Active

Dual diaphragm pump assembly for a sanitation system

US8529223B2 · kind B2 · utility

12Cited by

12References

7Claims

0Family size

Assignee

Thetford LLC · NL

Inventors

William Cohoon · Iron River, US
George Grech · Garden City, US
Steven A. Meyer · Iron River, US

Key dates

Filing date	Oct 3, 2008
Grant date	Sep 10, 2013
Priority date	—
Expiry date	Nov 28, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B43/025
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pump assembly includes a housing defining a working chamber, a water pump chamber and a waste pump chamber. A first diaphragm separates the water pump chamber and the working chamber. A second diaphragm separates the waste pump chamber and the working chamber. A common driver member interconnects the first diaphragm and the second diaphragm. Movement of the driven member to a first position creates a positive pressure in the water pump chamber and a negative pressure in the waste pump chamber. Movement of the driven member to a second position creates a negative pressure in the water pump chamber and a positive pressure in the waste pump chamber.

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