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:
Dec. 24, 1991
Filed:
Nov. 25, 1988
Applicant:
Inventor:
Glover C McIntyre, Pickering, Ontario, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04F / ;
U.S. Cl.
CPC ...
417138 ; 417139 ; 417143 ; 417900 ;
Abstract
A pump for liquid or slurry is valve controlled to fill a pumping chamber to an upper predetermined level; valve controlled to supply gas under pressure to the top of the liquid to force it out a lower outlet port down to a lower predetermined level and to alternate such cycles with all valves being located outside the chamber.