Patent US4425919A successfully refreshed from Google Patents.
US4425919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque transmitting catheter apparatus
Assignee: Medtronic Inc
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Filing: 1981-07-27
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Granted: 1984-01-17
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Expires: 2001-07-27
Abstract
Abstract A torque transmitting catheter apparatus including a longitudinally pre-oriented thin-walled tubular substrate surrounded by a thin-walled reinforcing means comprising a flat wire braid wound over the substrate and held in place by a thin-walled tubular superstrate surrounding the reinforcing means and in contact with the substrate through the reinforcing means.
Inventors
- 👤 William W. Alston, Jr.
- 👤 William G. Bloom
- 👤 William C. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0012
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A torque transmitting catheter apparatus for inserting diagnostic fluid into body tissue, the catheter being inserted into the body by a process of feeding and rotating the apparatus through body tissues such as arteries and the like body passageways, the apparatus comprising: a longitudinally pre-oriented thin-walled tubular substrate; a thin-walled reinforcing means surrounding and in contact with the substrate, the reinforcing means comprising a braid of flat wires wound over the substrate; and a thin-walled tubular superstrate surrounding the reinforcing means, and in contact with the substrate, forcing the reinforcing means against the substrate and maintaining the reinforcing means wound over the substrate.
Claim 2
Dependent Claim
103 words
A torque transmitting catheter apparatus for inserting diagnostic fluid into body tissue, the catheter being inserted into the body by a process of feeding and rotating the apparatus through body tissues such as arteries and the like body passageways, the apparatus comprising: a longitudinally pre-oriented thin-walled tubular substrate; a thin-walled reinforcing means surrounding and in contact with the substrate, the reinforcing means comprising a braid of flat wires wound over the substrate; and a thin-walled tubular superstrate surrounding the reinforcing means, and in contact with the substrate, forcing the reinforcing means against the substrate and maintaining the reinforcing means wound over the substrate.
Claim 3
Dependent Claim
23 words
The apparatus as set forth in claim 1 wherein the substrate is stretched between 300% and 500% in the longitudinal direction for pre-orientation.
Claim 4
Dependent Claim
22 words
The apparatus as set forth in claim 1 wherein the substrate is stretched greater than 500% in the longitudinal direction for pre-orientation.
Claim 5
Dependent Claim
20 words
The apparatus as set forth in claim 1 wherein the substrate and the superstrate are made from a cross-linkable material.
Claim 6
Dependent Claim
16 words
The apparatus as set forth in claim 1 wherein the substrate is made from polyvinylidene fluoride.
Claim 7
Dependent Claim
16 words
The apparatus as set forth in claim 1 wherein the substrate is made from Nylon 12.
Claim 8
Dependent Claim
17 words
The apparatus as set forth in claim 4 wherein the superstrate is irradiated at least 2.5 Mrad.
Claim 9
Dependent Claim
28 words
The apparatus as set forth in claim 1 wherein the reinforcing means comprises a flat wire braid covering the outer surface of the substrate between 50% and 80%.
Claim 10
Dependent Claim
22 words
The apparatus as set forth in claim 8 wherein the flat wire braid has a braiding angle of between 35° and 60°.
References Cited (Backward Citations)
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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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |