US3859986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical device
Assignee: Individual
•
Filing: 1973-06-20
•
Granted: 1975-01-14
•
Expires: 1993-06-20
Abstract
Abstract A surgical device includes a flexible inner tube having one end dipped in a liquid refrigerant, a flexible outer tube receiving the inner tube and having a freezing tip disposed at a distance from the other end of the inner tube to define a space therebetween, and a vacuum pump for evacuating the outer tube and space, so that the refrigerant is introduced into the space through the inner tube to be evaporated therein to cool the freezing tip.
Inventors
- 👤 Jiro Okada
- 👤 Toshiyuki Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/307; A61B1/00064; A61B1/00071; A61B1/0008; A61B1/00098; A61B1/12; A61B18/00; A61B18/02; A61B1/06; A61B1/07; A61B2018/0212
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
244 words
A surgical device for treating a diseased portion comprising an inner tube having one end dipped in a liquid refrigerant and the other end provided with a nozzle, an outer tube spaced from and surrounding at least the other end portion of the inner tube and the nozzle, said tubes being movably disposed relative to each other, the outer tube having a freezing tip at one end disposed at a distance from the nozzle to define an evaporating space therebetween, vacuum means for evacuating the space between the outer periphery of the inner tube and the inner periphery of the outer tube and the evaporating space, to introduce the liquid refrigerant from said one end of the inner tube to the evaporating space, whereby the refrigerant is evaporated in said evaporating space to cool said freezing tip, the evaporated refrigerant then passing through the space between the inner and outer tubes to thermally insulate from the ambient the liquid refrigerant passing through the inner tube, said vacuum means being connected to an outer sleeve fixed to the inner sleeve, an inner sleeve coaxially inserted in said outer sleeve and movable along its axis, one end of said inner sleeve being connected to the other end of said outer tube, and a member for fixing the position of the inner sleeve relative to the outer sleeve, whereby to adjust the distance between the nozzle and freezing tip to control the dimensions of the evaporating space.
Claim 2
Dependent Claim
244 words
A surgical device for treating a diseased portion comprising an inner tube having one end dipped in a liquid refrigerant and the other end provided with a nozzle, an outer tube spaced from and surrounding at least the other end portion of the inner tube and the nozzle, said tubes being movably disposed relative to each other, the outer tube having a freezing tip at one end disposed at a distance from the nozzle to define an evaporating space therebetween, vacuum means for evacuating the space between the outer periphery of the inner tube and the inner periphery of the outer tube and the evaporating space, to introduce the liquid refrigerant from said one end of the inner tube to the evaporating space, whereby the refrigerant is evaporated in said evaporating space to cool said freezing tip, the evaporated refrigerant then passing through the space between the inner and outer tubes to thermally insulate from the ambient the liquid refrigerant passing through the inner tube, said vacuum means being connected to an outer sleeve fixed to the inner sleeve, an inner sleeve coaxially inserted in said outer sleeve and movable along its axis, one end of said inner sleeve being connected to the other end of said outer tube, and a member for fixing the position of the inner sleeve relative to the outer sleeve, whereby to adjust the distance between the nozzle and freezing tip to control the dimensions of the evaporating space.
Claim 3
Dependent Claim
16 words
The surgical device according to claim 1 wherein said inner and outer tubes are flexible tubes.
Claim 4
Dependent Claim
17 words
The surgical device according to claim 2 wherein said flexible tubes are made of thermal insulating substance.
Claim 5
Dependent Claim
14 words
The surgical device according to claim 3 wherein the thermal insulating substance is polyfluoroethylene.
Claim 6
Dependent Claim
24 words
The surgical device according to claim 2 wherein the freezing tip is attached to the end of the outer tube and made of metal.
Claim 7
Dependent Claim
16 words
The surgical device according to claim 1 which further comprises means for observing the freezing tip.
Claim 8
Dependent Claim
52 words
The surgical device according to claim 6 wherein said observing means is a cycstoscope comprising a sheath through which the outer tube is inserted to extend the freezing tip from an open end of the sheath, and a light guide inserted in the sheath for illuminating the area around the freezing tip.
Claim 9
Dependent Claim
88 words
The surgical device according to claim 6 wherein said observing means is a cystoscope comprising a sheath with aN opening and window which are formed near one end of the sheath, a light guide inserted in the sheath to illuminate the viewing field of the window, and a telescope slidably inserted in the sheath and having an ocular and optical system optically connecting the ocular to the window, the outer tube being slidably inserted through the sheath with the freezing tip extended from the opening in the sheath.
Claim 10
Dependent Claim
126 words
The surgical device according to claim 6 wherein said observing means is an endoscope comprising a distal end with a viewing window, illuminating window, opening, and a raising mechanism, a flexible tube on one end of which the distal end is mounted, and a control unit mounted on the other end of the flexible tube having an inlet opening and an ocular optically connected to the viewing window in the distal end, the outer tube being slidably inserted into the control unit inlet opening and through the endoscope, so that said one end of the outer tube and the freezing tip are extended from the opening in the distal end, and the extended portion of the outer tube end being adjustably inclined by the raising mechanism.
Claim 11
Dependent Claim
27 words
The surgical device according to claim 1 which further comprises a container for the liquid refrigerant in which said one end of the inner tube is dipped.
Claim 12
Dependent Claim
20 words
The surgical device according to claim 10 wherein said one end of the inner tube is provided with a filter.
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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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |