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:
May. 26, 1987
Filed:
Jun. 05, 1980
Ingemar H Lundquist, Oakland, CA (US);
Valleylab, Inc., Boulder, CO (US);
Abstract
Pump actuator assembly for use in operating a pump for supplying intravenous liquid to a patient which comprises a housing having a sealed chamber therein with a portion thereof being covered by a flexible membrane. A plunger is mounted in the housing so that a portion thereof is disposed in the sealed chamber for movement between innermost and outermost positions. A constant quantity of liquid fills the sealed chamber. A booth encloses the portion of the plunger disposed in the fluid. A liquid-tight seal is provided between the booth and the housing to permit the plunger to be moved between the innermost and outermost positions so that the flexible membrane can be caused to move between extended and retracted positions.