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:
Mar. 23, 2004
Filed:
Nov. 17, 2000
Philip Houle, Menlo Park, CA (US);
William T. Larkins, Manchester, NH (US);
Richard Lanigan, Concord, NH (US);
DEKA Products Limited Partnership, Manchester, NH (US);
Abstract
A valve ( ) for use in controlling the flow of IV fluid from a source to a patient. A cassette may include along the fluid passage through the cassette, first and second membrane-based valves ( ) on either side of a pressure-conduction chamber ( ), and a stopcock-type valve ( ). The stopcock valve is preferably located downstream of the second membrane-based valve ( ), which is preferably located downstream of the pressure-conduction chamber ( ). The membrane defining the valving chamber of the second membrane-based valve ( ) is preferably large and resilient, so that the valving chamber( ) may provide a supply of pressurized intravenous fluid to the patient, when the valve ( ) is closed and the stopcock valve ( ) provides a restriction downstream of the valve ( ). The pressure-conduction chamber ( ) preferably has a membrane ( ) that is stable in the empty-chamber position but relatively unstable in the filled-chamber position.