Patent EP0128703A1 successfully refreshed from Google Patents.
EP0128703A1
Expired / Lapsed
EP
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Non-contact controlled micropump
Assignee: KOICHI, SAKURAI
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Filing: 1984-05-31
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Granted: —
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Expires: 2004-05-31
Abstract
Abstract An implantable micropump comprises a refillable chamber (5) for pharmaceutical liquid, a bellows (1) which is expanded by air or gas so as to urge liquid from the chamber (5), and a valve (6). The valve (6) is controllable by a remotely actuated electromagnet (91. The micropump can also include a pressure- regulating valve inwhich the valve member is urged towards a valve seal by a first elastic force, and is urged away from the valve seat to allow passage of liquid in response to pressure on a diaphragm on the downstream side dropping below a predetermined value.
Inventors
- 👤 Tatsuhei Kondo
- 👤 Kaname Ito
- 👤 Shoichiro Ikeda
- 👤 Masayoshi Umeno
- 👤 Kenji Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:09
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14244; A61M5/14276; A61M2205/00; A61M2205/35; A61M2205/3507; A61M2205/3515; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
44 words
A micropump including a chamber (5) for liquid, a bellows (1) to be expanded by air or gas to tend to urge liquid from the chamber and a valve (6) controllable by a remote electromagnet (9) to control outflow of liquid from the chamber.
Claim 2
Dependent Claim
44 words
A micropump including a chamber (5) for liquid, a bellows (1) to be expanded by air or gas to tend to urge liquid from the chamber and a valve (6) controllable by a remote electromagnet (9) to control outflow of liquid from the chamber.
Claim 3
Dependent Claim
18 words
A micropump according to claim 1, wherein the surface of the pump is formed of a biocompatible material.
Claim 4
Dependent Claim
29 words
A micropump according to claim 1 or 2 wherein the chamber has an inset (3,4) through which it can be supplied with liquid by means of an injector needle.
Claim 5
Dependent Claim
15 words
A micropump according to claim 3, wherein the inlet (3,4) allows percutaneous supply of pharmaceuticals.
Claim 6
Dependent Claim
40 words
A micropump according to claim 1, 2, 3 or 4 including a pressure regulating valve (14-24) for regulating the pressure of the liquid pressured by the bellows (1) prior to supply of such liquid to the first said valve (6).
Claim 7
Dependent Claim
62 words
A micropump according to claim 5 wherein the pressure regulating valve includes a valve member (16) urged towards a valve seat (18) by a first elastic force and urged away from the valve seat (18) to allow passage of liquid past the valve member (16) in response to pressure on a diaphragm (24) on the downstream side falling below a predetermined value.
Claim 8
Dependent Claim
36 words
A pump system comprising a micropump to be situated in a human body for delivering a liquid and an electromagnet situated outside the human body, the delivery rate of the micropump being remote-controlled by the electromagnet.
Claim 9
Dependent Claim
36 words
A pump system comprising a micropump to be situated in a human body for delivering a liquid and an electromagnet situated outside the human body, the delivery rate of the micropump being remote-controlled by the electromagnet.
Claim 10
Dependent Claim
20 words
A pump system according to claim 7 wherein the micropump is according to any one of claims 1 to 6.
References Cited (Backward Citations)
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