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:
Aug. 14, 1990
Filed:
Oct. 28, 1987
Applicant:
Inventors:
Assignee:
Portasilo Limited, Huntington York, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E03D / ;
U.S. Cl.
CPC ...
4321 ; 4317 ; 4308 ; 4410 ; 417472 ;
Abstract
A pump comprising a flexible member defining at least part of a variable volume pumping chamber, an inlet valve to permit of liquid to enter the chamber thereby and an outlet valve to permit of liquid to leave the chamber thereby, and an operating member to deform the flexible member to vary the volume of the pumping chamber to pump liquid into and out of the chamber.