Patent US3726281A successfully refreshed from Google Patents.
US3726281A
Expired / Lapsed
US
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Self-lubricating catheter
Assignee: CR Bard Inc
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Filing: 1971-12-08
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Granted: 1973-04-10
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Expires: 1991-12-08
Abstract
Abstract A urinary catheter provided with a lubrication lumen extending from an eye adjacent the distal tip to a reservoir adjacent the drainage funnel, with means for permitting, causing and controlling the flow of lubricant from the reservoir to the eye as the catheter is inserted into a patient.
Inventors
- 👤 W Norton
- 👤 K Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/0043; A61M2025/0062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A catheter adapted for insertion into a body passage of restricted size comprising a shaft, a main lumen traversing said shaft from a point adjacent the distal tip thereof to the proximal end thereof, and an integral lubrication system including an eye close to the distal tip of the catheter, a funnel adjacent the proximal end of the catheter, a lumen connecting said funnel to said eye, a first closure for the proximal end of said funnel and a removable second closure for the distal end of said funnel, the interior of said funnel between said closures constituting a lubricant containing chamber from which lubricant may be expressed upon removal of the removable closure.
Claim 2
Dependent Claim
114 words
A catheter adapted for insertion into a body passage of restricted size comprising a shaft, a main lumen traversing said shaft from a point adjacent the distal tip thereof to the proximal end thereof, and an integral lubrication system including an eye close to the distal tip of the catheter, a funnel adjacent the proximal end of the catheter, a lumen connecting said funnel to said eye, a first closure for the proximal end of said funnel and a removable second closure for the distal end of said funnel, the interior of said funnel between said closures constituting a lubricant containing chamber from which lubricant may be expressed upon removal of the removable closure.
Claim 3
Dependent Claim
23 words
A catheter according to claim 1 which includes a flow restrainer in said second named lumen adjacent the connection thereof to said funnel.
Claim 4
Dependent Claim
26 words
A catheter according to claim 2 wherein the flow restrainer is a cylindrical body traversed axially by an orifice smaller than the cross-section of said lumen.
Claim 5
Dependent Claim
15 words
A catheter according to claim 1 in which the first closure is a one-way valve.
Claim 6
Dependent Claim
16 words
A catheter according to claim 4 in which the valve is a plug of self-sealing material.
Claim 7
Dependent Claim
14 words
A catheter according to claim 1 in which the second closure is a clamp.
Claim 8
Dependent Claim
41 words
A catheter according to claim 1 in which said funnel is adapted to be inflated by forcible injection of lubricant, to restrain the lubricant under pressure and to express automatically a portion of the lubricant upon removal of said second closure.
Claim 9
Dependent Claim
26 words
A catheter according to claim 1 which includes a quantity of lubricant confined in the funnel, the funnel being stretched and the lubricant being under pressure.
References Cited (Backward Citations)
US2845930A
Cited
US2912981A
Cited
US3275001A
Cited
US3345988A
Cited
US3683928A
Cited
US3648704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |