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US Patent 4938761 - Bipolar electrosurgical forceps

US Patent Issued on July 3, 1990
Estimated Patent Expiration Date: Icon_subject March 6, 2010Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

A bioplar electrosurgical forceps carries a thermocouple junction at the distal end of each of two mutually opposed prongs. The junctions are formed by welding a constantan wire directly to the ferrous metal prongs, thereby avoiding the need for electrical isolation.

Other References

  • "New Dimensions in Biopolar Coagulation", a brochure, F. L. Fischer
  • Sugita et al, "Bipolar Coagulator . . . ", J. Neurosurg., vol. 41, Dec. 1974, pp. 777-77

Inventor

Assignee

Application

No. 319050 filed on 03/06/1990

US Classes:

606/51, With forceps or tweezers606/40, Coagulation606/52With forceps or tweezers

Field of Search

219/230, With tip cooling, clamping, or lighting means219/241, With thermal control means606/43, Depilation606/48, Bipolar electrodes606/51, With forceps or tweezers606/52, With forceps or tweezers606/36, Depilation606/39, Cutting606/38, With feed back control606/40, Coagulation606/37Combined cutting-coagulation

Examiners

Primary: Cohen, Lee S.

Attorney, Agent or Firm

US Patent References

3685518, 4041952, Electrosurgical forceps
Issued on: 08/16/1977
Inventor: Morrison, Jr. ,   et al.
4411266, Thermocouple radio frequency lesion electrode
Issued on: 10/25/1983
Inventor: Cosman
4671274, Bipolar electrosurgical instrument
Issued on: 06/09/1987
Inventor: Sorochenko
4685459, Device for bipolar high-frequency coagulation of biological tissue
Issued on: 08/11/1987
Inventor: Koch ,   et al.
4686980Disposable bipolar instrument
Issued on: 08/18/1987
Inventor: Williams ,   et al.

International Class

A61B 017/39

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