US4842590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter and method for making
Assignee: Terumo Corp
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Filing: 1988-06-02
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Granted: 1989-06-27
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Expires: 2008-06-02
Abstract
Abstract In a catheter comprising a proximal inner tube having a reinforcing layer applied thereto and a distal inner tube made of a material having different physical properties from those of the proximal inner tube, the proximal and distal inner tubes are axially integrally connected such that the outer surface of the proximal inner tube is substantially smooth and continuous to that of the distal inner tube, and a sheath continuously covers the proximal and distal inner tubes. The catheter is produced by axially integrally joining proximal and distal inner tubes and continuously covering the interconnected tubes with a sheath.
Inventors
- 👤 Susumu Tanabe
- 👤 Tatsuo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:04
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/001; A61M25/0012
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
229 words
A catheter comprising a body portion including a proximal inner tube made of an elastomer and a reinforcing layer embedded in the surface of the proximal inner tube; and a tip portion including a distal inner tube made of a radiopaque substance-containing material and which is more flexible than said elastomeric proximal inner tube; said reinforcing layer of said proximal inner tube comprising a metal material wire braiding to provide an increased response of said tip portion to rotation of said body portion; said proximal inner tube having substantially the same outside diameter as said distal inner tube, said proximal inner tube being axially interconnected to said distal inner tube at a joint via radially and axially directed joint surfaces, the outer diameters of said proximal and distal inner tubes being substantially the same at least at portions thereof adjacent said radially and axially directed joint surfaces to provide a substantially smooth and continuous connection at least on the outer surfaces of said interconnected proximal and distal inner tubes; and said body and said tip portions including a sheath of a radiopaque substance-free elastomer continuously covering the outer surface of said proximal inner tube and the outer surface of said distal inner tube and bonded to the outer surfaces of said proximal and distal inner tubes at least at the portions thereof in the vicinity of said joint surfaces.
Claim 2
Dependent Claim
229 words
A catheter comprising a body portion including a proximal inner tube made of an elastomer and a reinforcing layer embedded in the surface of the proximal inner tube; and a tip portion including a distal inner tube made of a radiopaque substance-containing material and which is more flexible than said elastomeric proximal inner tube; said reinforcing layer of said proximal inner tube comprising a metal material wire braiding to provide an increased response of said tip portion to rotation of said body portion; said proximal inner tube having substantially the same outside diameter as said distal inner tube, said proximal inner tube being axially interconnected to said distal inner tube at a joint via radially and axially directed joint surfaces, the outer diameters of said proximal and distal inner tubes being substantially the same at least at portions thereof adjacent said radially and axially directed joint surfaces to provide a substantially smooth and continuous connection at least on the outer surfaces of said interconnected proximal and distal inner tubes; and said body and said tip portions including a sheath of a radiopaque substance-free elastomer continuously covering the outer surface of said proximal inner tube and the outer surface of said distal inner tube and bonded to the outer surfaces of said proximal and distal inner tubes at least at the portions thereof in the vicinity of said joint surfaces.
Claim 3
Dependent Claim
60 words
The catheter of claim 1, wherein each of said proximal and distal inner tubes at said joint has a radial surface extending from an inner surface thereof, another radial surface extending from the outer surface thereof, and a circumferential surface axially extending between said radial surfaces, said proximal and distal inner tubes being fitted with each other at said joint.
Claim 4
Dependent Claim
34 words
The catheter of claim 1, wherein each of said proximal and distal inner tubes at said joint has a recess in its inner surface, and comprising a joint tube snugly fitted in said recesses.
Claim 5
Dependent Claim
24 words
The catheter of claim 1, wherein said proximal inner tube, said distal inner tube, and said sheath are made of polyamide elastomer base materials.
Claim 6
Dependent Claim
11 words
The catheter of claim 1, wherein said reinforcing layer is braided.
Claim 7
Dependent Claim
17 words
The catheter of claim 1, wherein said reinforcing layer comprises a network of braided stainless steel wire.
Claim 8
Dependent Claim
18 words
The catheter of claim 6, wherein said stainless steel wire has a diameter of 0.03 to 0.10 mm.
Claim 9
Dependent Claim
20 words
The catheter of claim 1, wherein said distal inner tube is made of a polyamide elastomer plasticized with ethylhexyl para-hydroxybenzoate.
Claim 10
Dependent Claim
55 words
The catheter of claim 1, wherein said proximal and distal inner tubes each have an inside diameter of 0.5 to 2.0 mm; said sheath has an outside diameter of 1 to 3 mm and a wall thickness of 0.05 to 0.25 mm; and said catheter has a total wall thickness of 0.15 to 0.5 mm.
Claim 11
Dependent Claim
13 words
The catheter of claim 1, wherein said sheath is coated with an anticoagulant.
Claim 12
Dependent Claim
30 words
The catheter of claim 1, wherein said sheath is bonded to said proximal and distal inner tubes over substantially the complete outer surfaces of said proximal and distal inner tubes.
Claim 13
Dependent Claim
23 words
The catheter of claim 1, wherein said proximal and distal inner tubes have substantially the same outer diameter over the complete length thereof.
Claim 14
Dependent Claim
30 words
The catheter of claim 12, wherein said sheath is bonded to said proximal and distal inner tubes over substantially the complete outer surfaces of said proximal and distal inner tubes.
Claim 15
Dependent Claim
28 words
The catheter of claim 1, wherein said distal inner tube is made of a material which is more flexible than said elastomeric material of said proximal inner tube.
Claim 16
Dependent Claim
19 words
The catheter of claim 1, wherein said sheath is extruded over said body portion and said distal inner tube.
Claim 17
Dependent Claim
221 words
A catheter comprising a body portion including a proximal inner tube made of an elastomer and a reinforcing layer embedded in the surface of the proximal inner tube; and a tip portion including a distal inner tube made of a plastically deformable material containing a radiopaque substance; said reinforcing layer of said proximal inner tube comprising a metal material wire braiding to provide an increased response of said tip portion to rotation of said body portion; said proximal inner tube having substantially the same outside diameter as said distal inner tube, said proximal inner tube being axially interconnected to said distal inner tube at a joint via radially and axially directed joint surfaces, the outer diameters of said proximal and distal inner tubes being substantially the same at least at portions thereof adjacent said radially and axially directed joint surfaces to provide a substantially smooth and continuous connection at least on the outer surfaces of said interconnected proximal and distal inner tubes; said body and said tip portions including a sheath of a radiopaque substance-free elastomer continuously covering the outer surface of said proximal inner tube and the outer surface of said distal inner tube and bonded to the outer surfaces of said proximal and distal inner tubes at least at the portions thereof in the vicinity of said joint surfaces.
Claim 18
Dependent Claim
221 words
A catheter comprising a body portion including a proximal inner tube made of an elastomer and a reinforcing layer embedded in the surface of the proximal inner tube; and a tip portion including a distal inner tube made of a plastically deformable material containing a radiopaque substance; said reinforcing layer of said proximal inner tube comprising a metal material wire braiding to provide an increased response of said tip portion to rotation of said body portion; said proximal inner tube having substantially the same outside diameter as said distal inner tube, said proximal inner tube being axially interconnected to said distal inner tube at a joint via radially and axially directed joint surfaces, the outer diameters of said proximal and distal inner tubes being substantially the same at least at portions thereof adjacent said radially and axially directed joint surfaces to provide a substantially smooth and continuous connection at least on the outer surfaces of said interconnected proximal and distal inner tubes; said body and said tip portions including a sheath of a radiopaque substance-free elastomer continuously covering the outer surface of said proximal inner tube and the outer surface of said distal inner tube and bonded to the outer surfaces of said proximal and distal inner tubes at least at the portions thereof in the vicinity of said joint surfaces.
Claim 19
Dependent Claim
61 words
The catheter of claim 16, wherein each of said proximal and distal inner tubes at said joint has a radial surface extending from an inner surface thereof, another radial surface extending from the outer surface thereof, and a circumferential surface axially extedning between said radial surfaces, said proximal and distal inner tubes being snugly fitted with each other at said joint.
Claim 20
Dependent Claim
34 words
The catheter of claim 16, wherein each of said proximal and distal inner tubes at said joint has a recess in its inner surface, and comprising a joint tube snugly fitted in said recesses.
Claim 21
Dependent Claim
19 words
The catheter of claim 16, wherein said proximal inner tube and said sheath are made of a polyamide elastomer.
Claim 22
Dependent Claim
11 words
The catheter of claim 16, wherein said reinforcing layer is braided.
Claim 23
Dependent Claim
17 words
The catheter of claim 16, wherein said reinforcing layer comprises a network of braided stainless steel wire.
Claim 24
Dependent Claim
32 words
The catheter of claim 16, wherein said sheath is bonded to said body portion and said distal inner tube over substantially the complete outer surfaces of said proximal and distal inner tubes.
Claim 25
Dependent Claim
22 words
The catheter of claim 16, wherein said proximal and distal inner tubes have substantially the same diameter over the complete length thereof.
Claim 26
Dependent Claim
32 words
The catheter of claim 23, wherein said sheath is bonded to said body portion and said distal inner tube over substantially the complete outer surfaces of said proximal and distal inner tubes.
Claim 27
Dependent Claim
23 words
The catheter of claim 16, wherein said sheath is an extruded layer covering said outer surfaces of said proximal and distal inner tubes.
Claim 28
Dependent Claim
55 words
The catheter of claim 16, wherein said proximal and distal inner tubes each have an inside diameter of 0.5 to 2.0 mm; said sheath has an outside diameter of 1 to 3 mm and a wall thickness of 0.05 to 0.25 mm; and said catheter has a total wall thickness of 0.25 to 0.5 mm.
Claim 29
Dependent Claim
13 words
The catheter of claim 16, wherein said sheath is coated with an anticoagulant.
Claim 30
Dependent Claim
31 words
The catheter of claim 1, wherein said reinforcing layer of said body portion is arranged to assist in increasing the response of said tip portion to rotation of said body portion.
Claim 31
Dependent Claim
15 words
The catheter of claim 28, wherein said reinforcing layer is braided in said body portion.
Claim 32
Dependent Claim
31 words
The catheter of claim 16, wherein said reinforcing layer of said body portion is arranged to assist in increasing the response of said tip portion to rotation of said body portion.
Claim 33
Dependent Claim
15 words
The catheter of claim 30, wherein said reinforcing layer is braided in said body portion.
Claim 34
Dependent Claim
14 words
The catheter of claim 1, wherein said wire braiding is stainless steel wire braiding.
Claim 35
Dependent Claim
14 words
The catheter of claim 16, wherein said wire braiding is stainless steel wire braiding.
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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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |