Title:
容積ポンプ
Document Type and Number:
Japanese Patent JP4112641
Kind Code:
B2
Abstract:
A volumetric pump for administering intravenous fluids to a patient comprises a housing having an elongate cavity therein with an open and a closed end. A resilient sheet of material having a centrally-located aperture covers the open end, and a pump shaft is slidably disposed through the aperture to form a sphincter seal therebetween. An inlet conduit leading from a fluid source (an IV bag) passes through the housing into the cavity near the open end thereof, and an outlet conduit leading to a fluid sink (the patient) passes through the housing from the cavity near the closed end thereof. The shaft is driven back and forth in reciprocating motion inwardly and outwardly of the cavity to produce, respectively, a positive pressure forcing fluid out of the outlet conduit to the fluid sink, and a negative pressure forcing fluid from the fluid source through the inlet conduit.
Inventors:
Stephen C. Jacobsen
Clark Sea. Davis
Clark Sea. Davis
Application Number:
JP28825194A
Publication Date:
July 02, 2008
Filing Date:
November 22, 1994
Export Citation:
Assignee:
Circus group
International Classes:
F04B3/00; A61M5/142; F04B17/04; F04B7/00; F04B9/02; F04B9/04; F04B17/00; F04B17/03; F04B49/12; F04B53/02; F04B53/16; F16K41/12; H01F7/02
Domestic Patent References:
| JP56501555A | ||||
| JP507525Y1 | ||||
| JP6251764A |
Foreign References:
| US5144882 | ||||
| US3345076 | ||||
| DE4337341A1 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Yukio Iwamoto
Toru Mori
Hajime Asamura
Yukio Iwamoto
Toru Mori