US3902494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction surgical instrument
Assignee: SCHEERER
•
Filing: 1974-04-30
•
Granted: 1975-09-02
•
Expires: 1994-04-30
Abstract
Abstract A suction surgical instrument combining the functions of removing liquids and/or tissue from the operation area and of coagulating tissue. A suction shaft of an electrically insulating material and modifications of a coagulating electrode positioned at the suction port prevent traditional clogging of the suction shaft. Insulation and position of the electric lead aid in increasing the stiffness of the suction shaft.
Inventors
- 👤 Roland Haberlen
- 👤 Theodor Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; Y; Y10; Y10S; Y10S604/00; Y10S604/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
A surgical instrument comprising: a tubelike suction shaft comprising an electrical insulating material forming a wall which surrounds a suction channel, said suction shaft having at its first end a connection socket for attachment to a source of suction for removing liquids and/or tissue from a surgical operation area, the second shaft end being opened to form a suction port the size of which is coextensive with the internal opening of said second shaft end, electrode means positioned out of said channel and connected to said shaft wall and extending from the outside across a portion of said suction port and constricting said suction port, and an insulated electric lead for supplying high frequency current operably connected with said electrode means, said electric lead being positioned out of said channel and disposed lengthwise of and connected to said shaft wall.
Claim 2
Dependent Claim
140 words
A surgical instrument comprising: a tubelike suction shaft comprising an electrical insulating material forming a wall which surrounds a suction channel, said suction shaft having at its first end a connection socket for attachment to a source of suction for removing liquids and/or tissue from a surgical operation area, the second shaft end being opened to form a suction port the size of which is coextensive with the internal opening of said second shaft end, electrode means positioned out of said channel and connected to said shaft wall and extending from the outside across a portion of said suction port and constricting said suction port, and an insulated electric lead for supplying high frequency current operably connected with said electrode means, said electric lead being positioned out of said channel and disposed lengthwise of and connected to said shaft wall.
Claim 3
Dependent Claim
19 words
An instrument according to claim 1, wherein said electric lead is formed with means for increasing its bending resistance.
Claim 4
Dependent Claim
28 words
A surgical instrument according to claim 1, wherein the insulation for said electric lead is provided by an insulating tube enclosing both said electric lead and suction shaft.
Claim 5
Dependent Claim
32 words
A surgical instrument as defined in claim 1, wherein said electric lead comprises a round bar provided with a milled groove shaped to the circumference of said suction shaft and fitting thereon.
Claim 6
Dependent Claim
30 words
An instrument as defined in claim 1, wherein said electric lead is embedded in the outer surface of said suction shaft to provide for the electrical insulation of said lead.
Claim 7
Dependent Claim
14 words
A surgical instrument according to claim 1, wherein said suction shaft consists of polytetrafluoroethylene.
Claim 8
Dependent Claim
38 words
An instrument according to claim 1, wherein said coagulating electrode comprises a material thermally and electrically more conductive than stainless steel and extends into the insulation of said electric lead to increase the heating capacity of said electrode.
References Cited (Backward Citations)
US2275167A
Cited
US2808833A
Cited
US2814296A
Cited
US2888928A
Cited
US3324225A
Cited
US3411507A
Cited
US3685518A
Cited
US3680544A
Cited
US3825004A
Cited
US3828780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |