US3762416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artery entry tool
Assignee: National Research Development Corp UK
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Filing: 1971-05-26
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Granted: 1973-10-02
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Expires: 1991-05-26
Abstract
Abstract A tool for providing an entry through a tissue wall, such as an artery, comprises an elongated member having a tapered end at which is provided a sharp edge for making an incision in the wall, this member being removably axially located in a tube with the tapered end projecting from one end of the tube, and the tube one end being tapered to meet the taper of the member and being provided with means for clamping the edge of the incision to the outside of the tube. The clamping action is preferably effected by urging a sleeve, located around the tube, against a re-entrant shoulder at the tapered end of the tube. Conveniently, the member is itself tubular with a rod axially movable therein to project at the relevant rod end a blade carried by the rod.
Inventors
- 👤 E Moss
- 👤 W Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3498; A61B17/3415; A61B2017/347
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
262 words
A surgical tool for providing an enTry through a tissue wall, comprising: a first elongate tubular member having one end portion of greater radial dimensions than the remainder thereof, which end portion is convergently tapered towards its adjacent free end and defines, remotely from said free end, a re-entrant shoulder; a second elongate tubular member having one end portion thereof tapered towards its adjacent free end, extending longitudinally within said first member with their respective tapered end portions similarly directed, and demountably connected with said first member to locate said tapered end portions in a contiguous successively tapering relationship; an elongate cutting member formed with a blade at one end thereof, and coupled with and longitudinally slidably located in said second member with said blade nearer to said tapered end portions; first spring means acting between said second member and said cutting member to withdraw said blade within said second member; a plunger connected with said cutting member remotely from said blade and operable, against the action of said first spring means, to project said blade from said second member to form an incision in a tissue wall and afford entry for said tapered end portions therethrough; a sleeve longitudinally slidably mounted around said first member; second spring means acting between said first member and said sleeve, and urging said sleeve towards engagement at one end thereof with said shoulder to clamp therebetween the circumferential tissue defining said incision; and a catch to hold said sleeve, against the action of said second spring means, removed from said shoulder when making said incision.
Claim 2
Dependent Claim
262 words
A surgical tool for providing an enTry through a tissue wall, comprising: a first elongate tubular member having one end portion of greater radial dimensions than the remainder thereof, which end portion is convergently tapered towards its adjacent free end and defines, remotely from said free end, a re-entrant shoulder; a second elongate tubular member having one end portion thereof tapered towards its adjacent free end, extending longitudinally within said first member with their respective tapered end portions similarly directed, and demountably connected with said first member to locate said tapered end portions in a contiguous successively tapering relationship; an elongate cutting member formed with a blade at one end thereof, and coupled with and longitudinally slidably located in said second member with said blade nearer to said tapered end portions; first spring means acting between said second member and said cutting member to withdraw said blade within said second member; a plunger connected with said cutting member remotely from said blade and operable, against the action of said first spring means, to project said blade from said second member to form an incision in a tissue wall and afford entry for said tapered end portions therethrough; a sleeve longitudinally slidably mounted around said first member; second spring means acting between said first member and said sleeve, and urging said sleeve towards engagement at one end thereof with said shoulder to clamp therebetween the circumferential tissue defining said incision; and a catch to hold said sleeve, against the action of said second spring means, removed from said shoulder when making said incision.
Claim 3
Dependent Claim
24 words
A tool according to claim 1 wherein said shoulder is formed with a circumferential depression therearound aligned with the adjacent end of said sleeve.
Claim 4
Dependent Claim
48 words
A tool according to claim 1 wherein said second member is formed with a slit aperture in its tapered end for passage of said blade therethrough, and said cutting member is coupled with said second member to key the same to align said blade with said slit aperture.
Claim 5
Dependent Claim
32 words
A tool according to claim 1 comprising a spring-loaded valve connected with said first member to close the bore thereof automatically upon demounting of said second member and said cutting member therefrom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |