Patent US5085223A successfully refreshed from Google Patents.
US5085223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniaturized pressure sensor having means for protection of diaphragm
Assignee: St Jude Medical Systems AB
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Filing: 1989-07-28
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Granted: 1992-02-04
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Expires: 2009-07-28
Abstract
Abstract A miniaturized transducer for in vivo measurements of physiological pressure has a transducer unit and an inner tube with a wall opening. A diaphragm covers the wall opening. Distinguishing for the invention is that the diaphragm is protected by an outer tube arranged outside the inner tube, and having a wall opening situated radially opposite the wall opening of the inner tube. An end closure closes off the distal end of the tube and a seal seals the outer tube against the inner tube. The lumen of the inner tube is in communication with the atmospheric pressure.
Inventors
- 👤 Tenerz Lars
- 👤 Hok Bertil
- 👤 Lonc Roman
- 👤 Hammarstrom Ola
- 👤 Engstrom Tomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61B5/02154; G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0076; G01L9/0077
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A miniaturized pressure transducer assembly, comprising: an outer tube; an inner tube disposed coaxially therein, thereby defining an annular space therebetween, said inner tube being in communication with atmospheric pressure; an annular joint located between a proximal end of said outer tube and an exterior wall of said inner tube; said inner and outer tubes each having a cooperating aperture defined near distal ends thereof; a diaphragm filling said aperture, said diaphragm being disposed in said annular space; a pressure transducer unit disposed within said inner tube, said pressure transducer unit moved by a movement of said diaphragm; and a distal end cap attached to said inner and outer tubes.
Claim 2
Dependent Claim
110 words
A miniaturized pressure transducer assembly, comprising: an outer tube; an inner tube disposed coaxially therein, thereby defining an annular space therebetween, said inner tube being in communication with atmospheric pressure; an annular joint located between a proximal end of said outer tube and an exterior wall of said inner tube; said inner and outer tubes each having a cooperating aperture defined near distal ends thereof; a diaphragm filling said aperture, said diaphragm being disposed in said annular space; a pressure transducer unit disposed within said inner tube, said pressure transducer unit moved by a movement of said diaphragm; and a distal end cap attached to said inner and outer tubes.
Claim 3
Dependent Claim
17 words
Transducer as claimed in claim 1, comprising a helix ribbon which is wound around the outer tube.
Claim 4
Dependent Claim
33 words
A transducer as claimed in claim 1, wherein said inner tube has first and second tubular portions, said first portion having an inner diameter greater than an outer diameter of said second portion.
Claim 5
Dependent Claim
26 words
Transducer as claimed in claim 3, wherein said inner tube has a joint between said first and second portions, said portions located inside the outer tube.
Claim 6
Dependent Claim
17 words
Transducer as claimed in claim 3, comprising a helix ribbon which is wound around said inner tube.
Claim 7
Dependent Claim
40 words
Transducer as claimed in claim 1, comprising a glue joint between said transducer unit is glued and an inner wall of said inner tube, said exterior wall of said inner tube connected to an inner wall of said outer tube.
Claim 8
Dependent Claim
15 words
Transducer as claimed in claim 1, wherein said inner tube has an additional wall aperture.
Claim 9
Dependent Claim
78 words
Transducer as claimed in claim 1, comprising a helix arranged at the distal end cap, said helix projecting forwards in the longitudinal direction of said tubes; a safety thread anchored at one end in a distal end part of the helix and at another end in the end cap; a tapered core filament arranged inside the helix, a larger end of said filament anchored in the distal end cap with a tip cantilevering out from the end cap.
Claim 10
Dependent Claim
14 words
Transducer as claimed in claim 1, wherein the end cap has a facet-ground tip.
Claim 11
Dependent Claim
17 words
Transducer as claimed in claim 1, comprising a helix ribbon which is wound around said inner tube.
References Cited (Backward Citations)
US3550583A
Cited
DE2206624A1
Cited
US4274423A
Cited
US4456013A
Cited
US4603699A
Cited
US4722348A
Cited
US4748986A
Cited
EP0241294B1
Cited
WO1988000023A1
Cited
US4735212A
Cited
EP0263190A1
Cited
US4873986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |