US3710781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter tip pressure transducer
Assignee: Individual
•
Filing: 1970-10-12
•
Granted: 1973-01-16
•
Expires: 1990-10-12
Abstract
Abstract A support member has a tubular shank end secured in the end of a catheter tube. A pair of elongated pressure transducer elements is mounted in opposite sides of the support. A flexible rubber sleeve sheathes the support and transducer elements and transmits external fluid pressure to outer faces of the transducer elements. Atmospheric pressure is communicated to inner faces of the transducer elements through said tubular shank and a lumen in the catheter tube.
Inventors
- 👤 T Huthcins
- 👤 M Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:55
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0069; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61M2025/0001; A61M2025/0002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
186 words
A catheter pressure transducer assembly comprising a flexible plastic catheter tube, a rigid tip member having a tubular shank on its proximal end received in the end of said catheter tube and having a cylindrical portion abutting the end of said tube, a distal end on said tip member, a pair of opposite side walls extending between said cylindrical portion and said distal end, a pair of ledges on said cylindrical portion recessed between said side walls in spaced relation thereto, a pair of ledges on said distal end recessed between said side walls in spaced relation thereto, a pair of piezo resistive beam elements on opposite sides of said tip member supported on said ledges, the sides of said beam elements being spaced from said side walls so that said beam elements can flex freely between said side walls, an impervious flexible sheath surrounding said tip member, said side walls having edges in the planes of the outer faces of said beam elements to support said sheath in contact with said outer faces, and circuit wires in said catheter tube connected to said beam elements.
Claim 2
Dependent Claim
186 words
A catheter pressure transducer assembly comprising a flexible plastic catheter tube, a rigid tip member having a tubular shank on its proximal end received in the end of said catheter tube and having a cylindrical portion abutting the end of said tube, a distal end on said tip member, a pair of opposite side walls extending between said cylindrical portion and said distal end, a pair of ledges on said cylindrical portion recessed between said side walls in spaced relation thereto, a pair of ledges on said distal end recessed between said side walls in spaced relation thereto, a pair of piezo resistive beam elements on opposite sides of said tip member supported on said ledges, the sides of said beam elements being spaced from said side walls so that said beam elements can flex freely between said side walls, an impervious flexible sheath surrounding said tip member, said side walls having edges in the planes of the outer faces of said beam elements to support said sheath in contact with said outer faces, and circuit wires in said catheter tube connected to said beam elements.
Claim 3
Dependent Claim
24 words
An assembly as defined in claim 1, said tip member having a web portion interconnecting said opposite side walls between said two beam elements.
Claim 4
Dependent Claim
20 words
An assembly as defined in claim 1 wherein said beam elements are held seated on said ledges by said sheath.
Claim 5
Dependent Claim
34 words
An assembly as defined in claim 1, said sheath comprising a pre-formed sleeve, and binding means overlying said shank binding said sleeve to said catheter tube and binding said catheter tube to said shank.
Claim 6
Dependent Claim
32 words
An assembly as defined in claim 1 including a lumen in said catheter tube communicating atmospheric pressure to the inside of said sheath and containing said circuit wires to said beam elements.
Claim 7
Dependent Claim
233 words
A catheter pressure transducer assembly comprising a flexible plastic catheter tube, a rigid tip member having a tubular shank on its proximal end received in the end of said catheter tube and having a cylindrical portion abutting the end of said tube, a distal end on said tip member, a pair of opposite side walls extending between said cylindrical portion and said distal end, a web interconnecting said opposite side walls, a pair of ledges on said cylindrical portion recessed between said side walls in spaced relation thereto on opposite sides of said web, a pair of ledges on said distal end recessed between said side walls in spaced relation thereto on opposite sides of said web, a pair of piezo resistive beam elements supported on said ledges on opposite sides of said web, the sides of said beam elements being spaced from said side walls so that said beAm elements can flex freely between said side walls, an impervious flexible sleeve surrounding said tip member and holding said beam elements seated on said ledges, said side walls having edges in the planes of the outer faces of said beam elements to support said sleeve in contact with said outer faces, binding means overlying said shank binding said sleeve to said catheter tube and binding said catheter tube to said shank, and circuit wires in said catheter tube connected to said beam elements.
Claim 8
Dependent Claim
233 words
A catheter pressure transducer assembly comprising a flexible plastic catheter tube, a rigid tip member having a tubular shank on its proximal end received in the end of said catheter tube and having a cylindrical portion abutting the end of said tube, a distal end on said tip member, a pair of opposite side walls extending between said cylindrical portion and said distal end, a web interconnecting said opposite side walls, a pair of ledges on said cylindrical portion recessed between said side walls in spaced relation thereto on opposite sides of said web, a pair of ledges on said distal end recessed between said side walls in spaced relation thereto on opposite sides of said web, a pair of piezo resistive beam elements supported on said ledges on opposite sides of said web, the sides of said beam elements being spaced from said side walls so that said beAm elements can flex freely between said side walls, an impervious flexible sleeve surrounding said tip member and holding said beam elements seated on said ledges, said side walls having edges in the planes of the outer faces of said beam elements to support said sleeve in contact with said outer faces, binding means overlying said shank binding said sleeve to said catheter tube and binding said catheter tube to said shank, and circuit wires in said catheter tube connected to said beam elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |