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:
Jan. 03, 1995
Filed:
Feb. 16, 1993
Greg S Duncan, Corona, CA (US);
Wilden Pump & Engineering Co., Colton, CA (US);
Abstract
A double diaphragm pump having an air chamber housing centrally located between two pump chamber housings. The air chamber housing includes a center section and two outwardly facing concave discs. Each pump chamber housing includes a pump chamber shell mating with one of the discs with a flexible diaphragm therebetween. Check valve chambers and inlet and outlet passages associated with each pump chamber and with inlet and exhaust manifolds control flow through the pump. A solenoid actuated valve alternately directs air pressure to each of the two diaphragms for reciprocal pumping action. Inner pistons associated with the diaphragms include stops which limit pump stroke in each direction. The solenoid may be driven by conventional electronics on a timed stroke or responsive to flow considerations.