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:
Nov. 26, 2002
Filed:
Jul. 20, 1999
Applicant:
Inventors:
Robert J. Bryant, Manchester, NH (US);
Larry B. Gray, Merrimack, NH (US);
Geoff P. Spencer, Manchester, NH (US);
Assignee:
DEKA Products Limited Partnership, Manchester, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B 9/08 ; F04B 4/306 ;
U.S. Cl.
CPC ...
F04B 9/08 ; F04B 4/306 ;
Abstract
Reusable pump drive systems are disclosed that utilize pressurized fluids for creating a force on a flexible or moveable surface of a pump chamber of a pumping cartridge. One such system includes a variable sized orifice valve included as part of a fluid supply system, which valve is able to selectively control a fluid pressure applied to the surface of a pump chamber. Other such systems include a switch valve, which is configured to select a first or second fluid supply source within the system for applying a desired pressure to the surface of a pump chamber.