Patent US3795245A successfully refreshed from Google Patents.
US3795245A
Expired / Lapsed
US
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Splash-proof leak-proof syringe-type cryosurgical instrument
Assignee: AL CO DU
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Filing: 1971-04-29
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Granted: 1974-03-05
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Expires: 1991-04-29
Abstract
Abstract A generally tubular splash-proof leak-proof syringe-type cryosurgical instrument formed of merging chambers is described. The generally tubular instrument is shaped in the silhouette of a finger tip at the end of a lower chamber. The lower chamber is surrounded by a thermal insulating layer and supports a thermal conducting probe that communicates between the interior of the instrument and the exterior thereof. A generally funnel-shaped member having internal ribs is mounted in the upper end of the instrument. The internal ribs support the space the base of an actuator-insertion cap from the funnel-shaped member so that an escape-port passageway is provided. The actuator-insertion cap has an outwardly extending transfer tube somewhat longer than the longitudinal length of the funnel-shaped member, and is attachable to a canister of refrigerant fluid. The actuatorinsertion cap assists the passage of the fluid through the funnel-shaped member into the interior of the housing. That is, the actuator-insertion cap is adapted to cause the canister to emit a cryogenic liquid refrigerant which flows through the transfer tube portion of the cap iunto the interior of the housing when the tube is inserted into the instrument along the longitudinal axis of the funnel-shaped member. The interior air that is displaced by the liquid refrigerant, as well as the evaporating gas of the liquid refrigerant entering the instrument escape via the escape-port passageway.
Inventors
- 👤 R Allen
- 👤 R Morel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:25
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
237 words
In a splash-proof, leak-proof, syringe-type cryosurgical instrument comprising: a longitudinal housing suitable for holding a cryogenic fluid, said housing having a lower chamber and an upper chamber, said lower chamber having a tip that is finger shaped in silhouette; a thermal conducting probe mounted in the finger shaped tip of the lower chamber of said housing so as to extend from the interior of said housing to the exterior thereof, said thermal conducting probe adapted to contact a cryogenic fluid held in said housing in a manner such that the tip of said probe is cooled by said cryogenic fluid; and, a funnel-shaped member mounted in the upper chamber of said housing, said funnel-shaped member having a large end defining a large opening located adjacent the top of the upper chamber of said housing and a small end defining a small opening located in said housing for aiding the insertion of said cryogenic fluid from an inserting device, said large end closing the upper chamber so as to prevent said cryogenic fluid from leaving said housing after said fluid has been inserted into said housing; the improvement wherein said funnel-shaped member includes rib means formed on said funnel-shaped member adjacent said large opening for providing an escape port passageway suitable for allowing gas to exhaust to atmosphere during the insertion of a cryogenic fluid into said housing by preventing said inserting device from closing said large opening.
Claim 2
Dependent Claim
237 words
In a splash-proof, leak-proof, syringe-type cryosurgical instrument comprising: a longitudinal housing suitable for holding a cryogenic fluid, said housing having a lower chamber and an upper chamber, said lower chamber having a tip that is finger shaped in silhouette; a thermal conducting probe mounted in the finger shaped tip of the lower chamber of said housing so as to extend from the interior of said housing to the exterior thereof, said thermal conducting probe adapted to contact a cryogenic fluid held in said housing in a manner such that the tip of said probe is cooled by said cryogenic fluid; and, a funnel-shaped member mounted in the upper chamber of said housing, said funnel-shaped member having a large end defining a large opening located adjacent the top of the upper chamber of said housing and a small end defining a small opening located in said housing for aiding the insertion of said cryogenic fluid from an inserting device, said large end closing the upper chamber so as to prevent said cryogenic fluid from leaving said housing after said fluid has been inserted into said housing; the improvement wherein said funnel-shaped member includes rib means formed on said funnel-shaped member adjacent said large opening for providing an escape port passageway suitable for allowing gas to exhaust to atmosphere during the insertion of a cryogenic fluid into said housing by preventing said inserting device from closing said large opening.
Claim 3
Dependent Claim
44 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 1 wherein said funnel-shaped member comprises an upper region, an elongated tubular lower region that is smaller in diameter than said upper region, and a tapered region that joins said upper and lower regions.
Claim 4
Dependent Claim
36 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 2 wherein said rib means of said funnel-shaped member includes a plurality of elongated supporting ribs formed parallel to the longitudinal axis of said funnel-shaped member.
Claim 5
Dependent Claim
46 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 1 wherein said upper and lower chambers are cylindrical in shape, said lower chamber having a smaller diameter than said upper chamber; and including a conically shaped center region that joins said upper and lower chambers.
Claim 6
Dependent Claim
51 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 4 wherein said lower chamber of said housing is covered with a thermal insulating material and wherein a well is formed at the end of the lower chamber of said longitudinal housing about the inner end of said thermal conducting probe.
Claim 7
Dependent Claim
33 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 5 wherein the lower end of said lower chamber extends outwardly and surrounds said probe leaving only the tip of said probe exposed.
Claim 8
Dependent Claim
38 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 6 wherein the rear portion of the portion of said lower chamber surrounding said probe is undercut so that the rear portion of said probe is also exposed.
Claim 9
Dependent Claim
44 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 7 wherein said funnel-shaped member comprises an upper region, an elongated tubular lower region That is smaller in diameter than said upper region, and a tapered region that joins said upper and lower regions.
Claim 10
Dependent Claim
36 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 8 wherein said rib means of said funnel-shaped member includes a plurality of elongated supporting ribs formed parallel to the longitudinal axis of said funnel-shaped member.
Claim 11
Dependent Claim
44 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 4 wherein said funnel-shaped member comprises an upper region, an elongated tubular lower region that is smaller in diameter than said upper region, and a tapered region that joins said upper and lower regions.
Claim 12
Dependent Claim
36 words
A splash-proof, leak-proof, syringe-type cryosurgical instrument as claimed in claim 10 wherein said rib means of said funnel-shaped member includes a plurality of elongated supporting ribs formed parallel to the longitudinal axis of said funnel-shaped member.
Claim 13
Dependent Claim
164 words
In a cryosurgical instrument having an internal chamber suitable for supporting a cryogenic fluid in contact with a probe that extends outwardly from one end of said chamber along the longitudinal axis thereof and an opening at the other end of said chamber adapted to provide for insertion of a cryogenic fluid from an inserting device into said chamber, the improvement comprising a fin means mounted inside said chamber adjacent said opening, said fin means including a plurality of elongated fins attached to said fin means along longitudinal edges at spaced intervals about the periphery of said chamber so as to radiate inwardly in planes located substantially parallel to the longitudinal axis of said chamber adjacent the opening of said cryosurgical instrument, the space between said fins adapted to provide passageways for the escape of air and other gases when a cryosurgical fluid is inserted into said chamber by preventing said inserting device from closing said opening to said escaping air and other gases.
Claim 14
Dependent Claim
164 words
In a cryosurgical instrument having an internal chamber suitable for supporting a cryogenic fluid in contact with a probe that extends outwardly from one end of said chamber along the longitudinal axis thereof and an opening at the other end of said chamber adapted to provide for insertion of a cryogenic fluid from an inserting device into said chamber, the improvement comprising a fin means mounted inside said chamber adjacent said opening, said fin means including a plurality of elongated fins attached to said fin means along longitudinal edges at spaced intervals about the periphery of said chamber so as to radiate inwardly in planes located substantially parallel to the longitudinal axis of said chamber adjacent the opening of said cryosurgical instrument, the space between said fins adapted to provide passageways for the escape of air and other gases when a cryosurgical fluid is inserted into said chamber by preventing said inserting device from closing said opening to said escaping air and other gases.
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |