US3880151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure receiver
Assignee: Siemens Elema AB
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Filing: 1973-07-06
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Granted: 1975-04-29
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Expires: 1993-07-06
Abstract
Abstract A pressure receiver for measuring intravascular pressure, and preferably pressure of body fluids in which a pressure chamber is formed as a truncated or frusto-conical cone, within which a conical member is positioned so as to extend in an oppositely directed and symmetrical relationship with respect to the truncated cone; the conical member being ended at its smaller end portion by a rounded-off, preferably spherically curved surface, the surface of the conical member being at a radially spaced distance from the smaller base surface of the truncated cone of the chamber, and in which the conical member is positioned so that its rounded-off end surface lies at an axial distance with respect to the larger surface of the truncated cone of the chamber surface; passageways which are interconnected with the pressure chamber extending from the larger base surface of the conical member; and a separating element being positioned on the larger surface of the truncated cone of the chamber intermediate a pressure sensing or feeling portion and the pressure chamber.
Inventors
- 👤 Kenth Ake Sune Nilsson
- 👤 Erik Olof Roland Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61B5/024; A61B5/0245; A61B5/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
192 words
Pressure receiver for the measurement of intravascular pressure and the pressure of body fluids or the like; said pressure receiver comprising, a pressure chamber, and pressure sensing means communicating with said pressure chamber, said pressure chamber including a frusto-conical recess portion, a conical member symmetrically projecting into said frusto-conical recess having a slope opposite to that of the frusto-conical recess, said conical member having the sloped conical surface thereof extending into a substantially spherically curved end surface at its smaller conical end portion, the annular surface of the conical member being at a radially spaced distance from the smaller annular apex surface of the frusto-conical recess and the spherically curved surface of said conical member being an axially spaced distance from the larger annular base surface of said frusto-conical recess, passageways communicating with said pressure chamber proximate the larger annular base surface of said conical member at the smaller annular base surface of said frusto-conical recess, and substantially planar separating means being provided at the larger base surface of said frusto-conical recess intermediate said pressure sensing means and said pressure chamber, said passageways extending in parallel with said substantially planar separating means.
Claim 2
Dependent Claim
192 words
Pressure receiver for the measurement of intravascular pressure and the pressure of body fluids or the like; said pressure receiver comprising, a pressure chamber, and pressure sensing means communicating with said pressure chamber, said pressure chamber including a frusto-conical recess portion, a conical member symmetrically projecting into said frusto-conical recess having a slope opposite to that of the frusto-conical recess, said conical member having the sloped conical surface thereof extending into a substantially spherically curved end surface at its smaller conical end portion, the annular surface of the conical member being at a radially spaced distance from the smaller annular apex surface of the frusto-conical recess and the spherically curved surface of said conical member being an axially spaced distance from the larger annular base surface of said frusto-conical recess, passageways communicating with said pressure chamber proximate the larger annular base surface of said conical member at the smaller annular base surface of said frusto-conical recess, and substantially planar separating means being provided at the larger base surface of said frusto-conical recess intermediate said pressure sensing means and said pressure chamber, said passageways extending in parallel with said substantially planar separating means.
Claim 3
Dependent Claim
35 words
Pressure receiver as claimed in claim 1, said separating means comprising a flexible membrane, said membrane being adapted to bacteriologically and in an electrically insulative manner separate said pressure sensing means and said pressure chamber.
Claim 4
Dependent Claim
36 words
Pressure receiver as claimed in claim 1, wherein the generatrix of the conical surface of said frusto-conical recess subtends an angle in the range of approximately 2* and 20* with the axis of symmetry said recess.
Claim 5
Dependent Claim
18 words
Pressure receiver as claimed in claim 3, said angle being 5* with respect to the axis of symmetry.
Claim 6
Dependent Claim
37 words
Pressure receiver as claimed in claim 1, wherein the generatrix of the conical surface of said conical member subtends an angle in the range of approximately 2* to 20* with the symmetrical axis of said frusto-conical recess.
Claim 7
Dependent Claim
18 words
Pressure receiver as claimed in claim 5, said angle being 5* with respect to the axis of symmetry.
Claim 8
Dependent Claim
33 words
Pressure receiver as claimed in claim 1, said conical member being at a radial spacing relative to the smaller annular apex surface of said frusto-conical recess of between 0.5 mm and 2 mm.
Claim 9
Dependent Claim
13 words
Pressure receiver as claimed in claim 7, said radial spacing being 1.2 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |