US5078727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheters
Assignee: Individual
•
Filing: 1990-06-22
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Granted: 1992-01-07
•
Expires: 2010-06-22
Abstract
Abstract A balloon dilatation catheter has a flexible, hollow inner shaft and an outer, braided shaft with a balloon that is inflatable by fluid introduced between the outer and inner shaft. The inner shaft is fixed relative to the outer shaft at both ends such that, when the balloon is inflated, the outer shaft shortens and the excess length of the inner shaft is accommodated by the inner shaft bending into a coil within the balloon.
Inventors
- 👤 Peter H. Hannam
- 👤 Peter Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:09
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1036; A61M25/104; A61M2025/0004
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
In a balloon dilatation catheter of the kind comprising a flexible inner shaft and an outer shaft embracing the inner shaft, the outer shaft having an expansible balloon portion towards its patient end that is inflatable by means of fluid introduced to the catheter to produce dilatation of a vessel within which the catheter is located, the improvement wherein the outer and inner shafts are fixed relative to one another at both ends, such that when the balloon portion is inflated it causes a shortening of the outer shaft, and wherein the flexibility of the inner shaft is such that its excess length on shortening of the outer shaft is accommodated within the balloon portion by bending of the inner shaft within the balloon portion.
Claim 2
Dependent Claim
125 words
In a balloon dilatation catheter of the kind comprising a flexible inner shaft and an outer shaft embracing the inner shaft, the outer shaft having an expansible balloon portion towards its patient end that is inflatable by means of fluid introduced to the catheter to produce dilatation of a vessel within which the catheter is located, the improvement wherein the outer and inner shafts are fixed relative to one another at both ends, such that when the balloon portion is inflated it causes a shortening of the outer shaft, and wherein the flexibility of the inner shaft is such that its excess length on shortening of the outer shaft is accommodated within the balloon portion by bending of the inner shaft within the balloon portion.
Claim 3
Dependent Claim
19 words
A catheter according to claim 1, wherein the inner shaft is bent into a coil within the balloon portion.
Claim 4
Dependent Claim
56 words
A catheter according to claim 1, wherein the catheter has an annular passage between the inner and outer shafts and an inflation housing towards the machine end of the catheter which communicates with the annular passage such that fluid can be supplied to or from the balloon portion via the inflation housing and the annular passage.
Claim 5
Dependent Claim
12 words
A catheter according to claim 1, wherein the balloon portion is resilient.
Claim 6
Dependent Claim
26 words
A catheter according to claim 1, wherein the inner shaft is hollow along its length such that a guide wire can be inserted through said catheter.
Claim 7
Dependent Claim
28 words
A catheter according to claim 1, wherein the outer shaft includes a braided sleeve extending along the major part at least of the length of the outer shaft.
Claim 8
Dependent Claim
50 words
A catheter according to claim 6, wherein the braided sleeve has a pick rate in the balloon portion that is different from that in the remainder of the outer shaft such that the braided sleeve is more expansible in the balloon portion than in the remainder of the outer shaft.
Claim 9
Dependent Claim
92 words
In a balloon dilatation catheter of the kind comprising a flexible inner shaft and an outer shaft embracing the inner shaft, the outer shaft having a balloon portion towards its patient end that is expanded by fluid pressure within the outer shaft, the improvement wherein the outer and inner shafts are fixed relative to one another at both ends, and wherein the inner shaft is bent within the balloon portion such that when the balloon portion is deflated by removal of the fluid pressure, the inner shaft within the balloon portion straightens.
Claim 10
Dependent Claim
92 words
In a balloon dilatation catheter of the kind comprising a flexible inner shaft and an outer shaft embracing the inner shaft, the outer shaft having a balloon portion towards its patient end that is expanded by fluid pressure within the outer shaft, the improvement wherein the outer and inner shafts are fixed relative to one another at both ends, and wherein the inner shaft is bent within the balloon portion such that when the balloon portion is deflated by removal of the fluid pressure, the inner shaft within the balloon portion straightens.
Claim 11
Dependent Claim
25 words
A catheter according to claim 8, wherein the inner shaft is bent into a coil within the balloon portion before removal of the fluid pressure.
Claim 12
Dependent Claim
12 words
A catheter according to claim 8, wherein the balloon portion is resilient.
References Cited (Backward Citations)
US4323071A
Cited
US4323071B1
Cited
US4276874A
Cited
US4702252A
Cited
WO1987000442A1
Cited
US4798586A
Cited
US4813934A
Cited
US4813934B1
Cited
US4820349A
Cited
US4943278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |