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. 16, 2011
Filed:
Sep. 24, 2002
John E. Nash, Chester Springs, PA (US);
Gregory Walters, Malvern, PA (US);
Stephen Heiman, Exton, PA (US);
Jim Barnitz, Schwenksville, PA (US);
Pete Fatone, Exton, PA (US);
John E. Nash, Chester Springs, PA (US);
Gregory Walters, Malvern, PA (US);
Stephen Heiman, Exton, PA (US);
Jim Barnitz, Schwenksville, PA (US);
Pete Fatone, Exton, PA (US);
Kensey Nash Corporation, Exton, PA (US);
Abstract
A pumping system for use in medical applications where liquids must be infused and aspirated from a mammalian patient, and whose economics are such that it is cost effective to simply dispose of it after a single use. The system features positive displacement pump(s) such as reciprocating pump(s) containing a damping mechanism to dampen out the peaks and valleys in the fluid pressure that is pumped, which is important for preventing cavitation. The system furthermore features a shut-off valve on the extraction side so that certain injected fluids such as contrast medium, are not immediately pumped out of the patient. In a preferred embodiment, the system also features means for independently controlling the fluid pressure/volume on the infusion and extraction sides, self-priming capability, a continuous fluid path, and visual air bubble detection, with viewports located at important points in the fluid path, such as at pumps and valves.