Patent US4022216A successfully refreshed from Google Patents.
US4022216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urological catheter
Assignee: Individual
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Filing: 1975-08-11
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Granted: 1977-05-10
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Expires: 1995-08-11
Abstract
Abstract Disclosed is a urological catheter equipped, at its distal portion, with a pair of balloons inflatable from the proximal end of the catheter. One balloon completely covers the distal tip of the catheter to serve, when inflated, as a cushion preventing damage to the patient's bladder, while the other balloon serves to anchor the catheter in sealing relation to the discharge passage of the bladder. A drainage opening in the catheter wall is disposed intermediate the balloons.
Inventors
- 👤 Robert C. Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:44
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
In a urological catheter comprising an elongated tubular member having a proximal end portion, a distal end portion for insertion into the bladder of a patient, a fluid passage extending from said proximal end portion to a draining eye in said distal end portion inflatable balloon means on said distal end portion and passage means leading from said proximal end portion to the interior of said balloon means, the improvement wherein said distal end portion has a closed tip, a first inflatable balloon enveloping said tip to prevent contact of bladder tissue by said tip, and attached to said member in a single zone of attachment that extends around the entire circumference of said member, and a second inflatable balloon attached to said member at a location spaced apart from said first balloon; said drainage eye disposed intermediate said first and second balloons, thereby enabling said balloons to restrain collapsed bladder tissue from occluding said said drainage eye; the distance along said distal end portion from said tip to the portion of said second balloon most remote from said tip is between about 1 and 2 inches; the distance between said drainage eye and each of said balloons is about 0.1 inch.
Claim 2
Dependent Claim
202 words
In a urological catheter comprising an elongated tubular member having a proximal end portion, a distal end portion for insertion into the bladder of a patient, a fluid passage extending from said proximal end portion to a draining eye in said distal end portion inflatable balloon means on said distal end portion and passage means leading from said proximal end portion to the interior of said balloon means, the improvement wherein said distal end portion has a closed tip, a first inflatable balloon enveloping said tip to prevent contact of bladder tissue by said tip, and attached to said member in a single zone of attachment that extends around the entire circumference of said member, and a second inflatable balloon attached to said member at a location spaced apart from said first balloon; said drainage eye disposed intermediate said first and second balloons, thereby enabling said balloons to restrain collapsed bladder tissue from occluding said said drainage eye; the distance along said distal end portion from said tip to the portion of said second balloon most remote from said tip is between about 1 and 2 inches; the distance between said drainage eye and each of said balloons is about 0.1 inch.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |