US4679567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure transducer
Assignee: Deseret Medical Inc
•
Filing: 1986-02-04
•
Granted: 1987-07-14
•
Expires: 2006-02-04
Abstract
Abstract Physiologic pressure transducers convert an applied pressure (e.g., blood pressure) into an electric signal, which can be displayed by a monitor as a numerical value or continuous waveform. While reusable pressure transducers have been used for a number of years, innovations in solid-state technology have made disposable transducers feasible. In particular, disposal transducers which are impedance matched for use with monitors formally used for reusable transducers are disclosed. The pressure transducer is rugged due to the careful mounting of the transducer diaphragm and integral compensation circuitry. In addition, the geometric configuration of the flow path is uniform such that debubbling of the unit is easy.
Inventors
- 👤 Stephen P. Hanlon
- 👤 Walter L. Kerby
- 👤 Edmund R. Purdy
- 👤 James Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/14; G01L19/142; A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; G01L19/0061; G01L19/0084; G01L19/143; G01L19/147; G01L9/00; G01L9/0001; G01L9/0002; A61B2562/00; A61B2562/02; A61B2562/0247
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
263 words
A pressure transducer assembly for monitoring pressure in a fluid comprising: a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber, a mounting means being an electrical insulator and having a centrally opened web with a receiving well extending outwardly therefrom and a transducer supporting portion in communication therewith, a lid means having a first area shaped to close a part of said opening and maintain a section of said uniformly dimensioned passage and a second area configured to fit within said mounting means receiving well and said first and second areas having a passageway extending therethrough to connect said flow path to the area of said opened web, a pressure transducer means secured in said supporting portion and exposed to said central opening of said web and said lid means passageway for determining and converting fluid pressure in said flow path into electrical signals, a fluid pressure responsive media which is electrically non-conductive said media closing the rest of said opening and filling said passageway between said flow path and said transducer, an electrical conducting means connected to said pressure transducer means and extending through said web and out of said mounted means as electrical connection lugs; and integrated circuit means mounted to said lugs and connected to an output cable for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument.
Claim 2
Dependent Claim
263 words
A pressure transducer assembly for monitoring pressure in a fluid comprising: a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber, a mounting means being an electrical insulator and having a centrally opened web with a receiving well extending outwardly therefrom and a transducer supporting portion in communication therewith, a lid means having a first area shaped to close a part of said opening and maintain a section of said uniformly dimensioned passage and a second area configured to fit within said mounting means receiving well and said first and second areas having a passageway extending therethrough to connect said flow path to the area of said opened web, a pressure transducer means secured in said supporting portion and exposed to said central opening of said web and said lid means passageway for determining and converting fluid pressure in said flow path into electrical signals, a fluid pressure responsive media which is electrically non-conductive said media closing the rest of said opening and filling said passageway between said flow path and said transducer, an electrical conducting means connected to said pressure transducer means and extending through said web and out of said mounted means as electrical connection lugs; and integrated circuit means mounted to said lugs and connected to an output cable for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument.
Claim 3
Dependent Claim
43 words
The pressure transducer assembly of claim 1 wherein said fluid pressure responsive media in said opening being shaped to conform to the wall of said flow path for forming a uniform flow path cross section between said inlet port and said outlet port.
Claim 4
Dependent Claim
92 words
The pressure transducer assembly of claim 1 wherein said flow path is comprised of a tube having sidewalls and openings connected between said inlet and outlet ports and said opening is cylindrical and normal to the path of flow and said lid means has upstanding arcuate portions thereon which conformed to the side walls of said tube at the side openings thereof upon placement of same therewithin and in combination with said pressure responsive media form a smooth tubular flow path of uniform cross section from said inlet to said outlet ports.
Claim 5
Dependent Claim
38 words
The pressure transducer assembly of claim 1 wherein said lid means is sealed within said receiving well and is sealed to said opening in said flow path for fluid communication between said flow path and said transducer means.
Claim 6
Dependent Claim
20 words
The pressure transducer assembly of claim 1 wherein said pressure transducer means is resiliently connected to said centrally opened web.
Claim 7
Dependent Claim
33 words
The pressure transducer assembly of claim 1 wherein said integrated circuit means includes signal modifying means for appropriately setting impedance from said transducer to the instrument for analyzing and recording the information transduced.
Claim 8
Dependent Claim
23 words
The pressure transducer assembly of claim 1 wherein a hollow cover is provided and shaped to seal said body and form an enclosure.
Claim 9
Dependent Claim
25 words
The pressure transducer assembly of claim 7 wherein said outlet cable is cooperatively engaged by said body and said cover to form a strain relief.
Claim 10
Dependent Claim
239 words
A pressure transducer assembly for monitoring pressure in a fluid comprising: a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber, a connecting means for support being an electrical insulator and having first and second sides with a central opening therethrough and said first side being bonded to said flow path opening, a pressure transducer means resiliently secured to said second side and exposed to said central opening of said connecting means for determining and converting fluid pressure in said flow path into electrical signals, a fluid pressure responsive media which is electrically non-conductive filling said central opening between said flow path and said transducer means, an electrical conducting means connected to said pressure transducer means and extending through said connecting means and out thereof forming as electrical connection lugs, integrated circuit means mounted to and supported by said lugs at one end and connected to an output cable at the other end for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument; and cover means sealing said body chamber and forming an enclosure and cooperating therewith as a strain relief for said output cable so the connection therefrom to said integrated circuit cannot impose a load thereon.
Claim 11
Dependent Claim
239 words
A pressure transducer assembly for monitoring pressure in a fluid comprising: a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber, a connecting means for support being an electrical insulator and having first and second sides with a central opening therethrough and said first side being bonded to said flow path opening, a pressure transducer means resiliently secured to said second side and exposed to said central opening of said connecting means for determining and converting fluid pressure in said flow path into electrical signals, a fluid pressure responsive media which is electrically non-conductive filling said central opening between said flow path and said transducer means, an electrical conducting means connected to said pressure transducer means and extending through said connecting means and out thereof forming as electrical connection lugs, integrated circuit means mounted to and supported by said lugs at one end and connected to an output cable at the other end for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument; and cover means sealing said body chamber and forming an enclosure and cooperating therewith as a strain relief for said output cable so the connection therefrom to said integrated circuit cannot impose a load thereon.
Claim 12
Dependent Claim
25 words
The pressure transducer assembly of claim 9 wherein said pressure transducer means is resiliently secured to said second side by said fluid pressure responsive means.
Claim 13
Dependent Claim
44 words
The pressure transducer assembly of claim 10 wherein said second side includes a recess supporting and protecting said transducer means resiliently secured therein and said central opening has a peripheral flange thereabout for providing a mounting place for said resiliently secured pressure transducer means.
Claim 14
Dependent Claim
53 words
The pressure transducer assembly of claim 9 wherein said connecting means for support includes a portion thereon which fits within said flow path opening to provide a uniform cross sectional area from said inlet to said outlet ports when said fluid pressure responsive media is filled within the opening in said connecting means.
Claim 15
Dependent Claim
31 words
The pressure transducer assembly of claim 9 wherein said a cover means is hollow and open forming its own chamber and includes an upstanding flange shaped to seal with said body.
Claim 16
Dependent Claim
26 words
The pressure transducer assembly of claim 13 wherein said outlet cable is cooperatively engaged by said body and said cover means thereby forming a strain relief.
Claim 17
Dependent Claim
111 words
The pressure transducer assembly of claim 13 wherein said connecting means depends from said hollow body and said pressure transducer is resiliently carried by said connecting means and said integrated circuit means is connected to said electrical conducting means and is carried cantilever fashion by said connecting means within the enclosure formed by said body and where said cover means and the inside surface of said cover means does not in any way interfere with or engage any portion of said integrated circuit means or connecting means such that said pressure transducer is resiliently suspended from said connecting means without carrying any stresses from said hollow body or said cover means.
References Cited (Backward Citations)
US3418853A
Cited
US4274423A
Cited
EP0079086A1
Cited
US4465075A
Cited
US4539998A
Cited
US4557269A
Cited
US4576181A
Cited
US4589287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |