EP0130441A2
Expired / Lapsed
EP
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Pressure measuring system
Assignee: Gambro Lundia AB
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Filing: 1984-06-15
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Granted: —
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Expires: 2004-06-15
Abstract
Abstract A pressure measuring system comprising a pressure-sensitive element (8) and a container (1) provided with at least one inlet (2). the container being intended to communicate through this inlet (2) with the medium whose pressure is to be measured. The system is characterised in that a pressure-transmitting wall part (12) of the container (1) is adapted so that with the help of a negative pressure it is fastened on by suction to the pressure-sensitive element (8) for measuring substantially the absolute pressure in the container. The system is particularly suitable for extracorporeal measurement of blood which is subjected to negative pressure.
Inventors
- 👤 Jan Seivert Claren
- 👤 Jan-Bertil Jeppsson
- 👤 Peter Robert Staehr
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 01:23
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3639; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61M1/3641; G; G01; G01L; G01L19/00; G01L19/06; G01L19/0672
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A pressure measuring system comprising a pressure-sensitive element (8) and a container (1) provided with at least one inlet (2) the container being intended to communicate through this inlet (2) with the medium whose pressure is to be measured, characterised in that a pressure-transmitting wall part (12) of the container (1) is adapted so that with the help of a negative pressure it is fastened on by suction to the pressure-sensitive element (8) for measuring substantially the absolute pressure in the container.
Claim 2
Dependent Claim
82 words
A pressure measuring system comprising a pressure-sensitive element (8) and a container (1) provided with at least one inlet (2) the container being intended to communicate through this inlet (2) with the medium whose pressure is to be measured, characterised in that a pressure-transmitting wall part (12) of the container (1) is adapted so that with the help of a negative pressure it is fastened on by suction to the pressure-sensitive element (8) for measuring substantially the absolute pressure in the container.
Claim 3
Dependent Claim
50 words
A pressure measuring system in accordance with claim 1, characterised in that the pressure-sensitive element (8) is arranged sunk in a cavity (5) into which can be inserted at least a part of the said container (1) for contact between the pressure-sensitive element (8) and the pressure-transmitting wall part (12).
Claim 4
Dependent Claim
60 words
A pressure measuring system in accordance with claim 1, characterised in that the said cavity (5) is provided with sealing elements (13, 14) which are adapted so as to separate in a sealing manner the pressure-sensitive body (8) and the pressure-transmitting wall part (12) from the outside atmosphere when the container (1) is in inserted position in the cavity (5).
Claim 5
Dependent Claim
44 words
A pressure measuring system in accordance with claim 1, characterised in that the said container (1) is also provided with an outlet (4) and that it is intended that the medium whose pressure is to be measured should be able to flow through it.
Claim 6
Dependent Claim
36 words
A pressure measuring system in accordance with anyone of the preceding claims, characterised in that the part of the container (1) insertable in the cavity (5) is of substantially the same shape as the cavity itself.
Claim 7
Dependent Claim
50 words
A pressure measuring system in accordance with anyone of the preceding claims, characterised in that the part of the container (1) insertable in the cavity (5) is formed double-walled, and that the space (20) containing the medium between these walls (12, 19) is considerably smaller than the cavity (5) itself.
Claim 8
Dependent Claim
51 words
A pressure measuring system in accordance with anyone of the preceding claims, characterised in that the cavity (5) as well as the part of the container (1) insertable therein are substantially cylindrical and are sealed off against one another by means of one or more annular seals, e.g. 0-rings (13, 14).
Claim 9
Dependent Claim
43 words
A pressure measuring system in accordance with anyone of the preceding claims, characterised by a thin and elastic protective sleeve (21) of substantially the same shape as the cavity (5) arranged between the cavity (5) and the part of the container insertable therein.
Claim 10
Dependent Claim
40 words
A pressure measuring system in accordance with claim 8, characterised in that the protective sleeve (21) is provided with sealing elements (23) to bring about a seal between the cavity (5) and the part of the container (1) insertable therein.
Claim 11
Dependent Claim
33 words
A pressure measuring system in accordance with claim 9, characterised in that the said sealing elements are in the form of one or more sealing rings (23a, 23b) moulded integrally with the sleeve.
Claim 12
Dependent Claim
73 words
A pressure measuring system in accordance with claim 8, characterised in that the inner part (24) of the protective sleeve (21) situated in inserted position closest to the pressure-sensitive element (8) is perforated so as to make possible a tight fastening on by suction of the pressure-transmitting wall part (12) of the container (1) to the pressure-sensitive element (8) essentially independently of the perforated part of the protective sleeve (21) situated in between.
References Cited (Backward Citations)
No citation records indexed.
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