Patent GB2101893A successfully refreshed from Google Patents.
GB2101893A
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Electrocautery needle and method of forming it
Assignee: Raychem Corp
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Filing: 1982-06-11
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Granted: —
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Expires: 2002-06-11
Abstract
Abstract A disposable electrocautery needle which may be used either in the bi-polar or mono-polar mode comprises an elongate inner electrode (12) located within a hollow outer elongate electrode (14) and held in place by means of a hollow insulating element located between them. The needle may be formed by locating the insulating element over the inner electrode, stretching it axially to reduce its diameter, positioning the inner electrode (12) and insulating element within the outer electrode (14) and causing the insulating element to recover to its unstretched configuration, for example by heat in the case of a heat-recoverable element, and position in the inner electrode (12) correctly within the outer electrode (14).
Inventors
- 👤 Gary Ira Geschwind
- 👤 William George Bloom
- 👤 James Elliot Jervis
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 05:16
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B2018/00315; A61B2018/00452; A61B2018/00476; A61F; A61F9/00; A61F9/007; A61F9/0079
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
113 words
An electrocautery needle, which comprises an elongate inner electrode located within and extending along a hollow elongate outer electrode, and a hollow insulating element disposed between the electrodes, the insulating element having been stretched in the axial direction from an initial configuration in which its external diameter is at least as great as the internal diameter of the outer electrode to a second configuration of smaller external diameter, and having been allowed to recover toward its initial configuration after it and the inner electrode have been inserted within the outer electrode so that it recovers against the electrodes and maintains them in their correct 4 GB 2 101 893 A 4 relative position.
Claim 2
Dependent Claim
113 words
An electrocautery needle, which comprises an elongate inner electrode located within and extending along a hollow elongate outer electrode, and a hollow insulating element disposed between the electrodes, the insulating element having been stretched in the axial direction from an initial configuration in which its external diameter is at least as great as the internal diameter of the outer electrode to a second configuration of smaller external diameter, and having been allowed to recover toward its initial configuration after it and the inner electrode have been inserted within the outer electrode so that it recovers against the electrodes and maintains them in their correct 4 GB 2 101 893 A 4 relative position.
Claim 3
Dependent Claim
31 words
A needle as claimed in claim 1, wherein the insulating element comprises a dimensionally heat recoverable polymeric material that has been heated to cause it to recover toward its initial configuration.
Claim 4
Dependent Claim
20 words
A needle as claimed in claim 1 orclaim 2, wherein one end of the electrodes has been shaped by grinding.
Claim 5
Dependent Claim
24 words
A needle as claimed in claim 3, wherein the inner electrode is solid and the shaped end has been 75 ground to a point.
Claim 6
Dependent Claim
16 words
A needle asclaimed in anyone of claims 1 to 3, wherein the inner electrode is hollow.
Claim 7
Dependent Claim
20 words
A needle as claimed in claim 5, wherein the inner electrode has a plurality of separate channels extending through it.
Claim 8
Dependent Claim
18 words
A needle isclaimed in anyone of claims 1 to 6, wherein the insulating element comprises a flur opolymer.
Claim 9
Dependent Claim
21 words
A needle is claimed in claim 7, wherein the insulating element comprises a block copolymer comprising tetrafluoroethylene units and ethylene units.
Claim 10
Dependent Claim
21 words
Aneedle asclaimed in anyone of claims 1 to 8, wherein the electrodes have substantially uniform cross-sections over substantially their entire length.
Claim 11
Dependent Claim
35 words
An electrocautery needle substantially as hereinbefore described with reference to, and as shown in, Figures 1 and 2, Figures 3A to 3D, Figures 4A to 4C, Figures 5A or Figure 5B of the accompanying drawings.
Claim 12
Dependent Claim
35 words
An electrocautery needle substantially as hereinbefore described with reference to, and as shown in, Figures 1 and 2, Figures 3A to 3D, Figures 4A to 4C, Figures 5A or Figure 5B of the accompanying drawings.
Claim 13
Independent Claim
82 words
A method of forming an electrocautery needle, which comprises: (a) inserting within a hollow elongate outer elec- trode a hollow insulating element that has an elongate inner electrode located within it, the insulating element being in an axially stretched configuration in which its external diameter is less than the internal diameter of the outer electrode, and (b) causing the insulating element to recover toward its unstretched configuration so that it recovers against the electrodes and maintains them in their correct relative position.
Claim 14
Independent Claim
82 words
A method of forming an electrocautery needle, which comprises: (a) inserting within a hollow elongate outer elec- trode a hollow insulating element that has an elongate inner electrode located within it, the insulating element being in an axially stretched configuration in which its external diameter is less than the internal diameter of the outer electrode, and (b) causing the insulating element to recover toward its unstretched configuration so that it recovers against the electrodes and maintains them in their correct relative position.
Claim 15
Dependent Claim
34 words
A method as claimed in claim 11, wherein the hollow insulating element constitutes the insulation or jacket of an electrical wire and the inner elongate inner electrode constituted the conductor of the electrical wire.
Claim 16
Dependent Claim
21 words
A method as claimed in claim 12, wherein the insulating element has been axially stretched during manufacture of the electrical wire.
Claim 17
Dependent Claim
35 words
A method as claimed in claim 11 orclaim 12, which includes the step of stretching the insulating element in the axial direction before the insulating element and inner electrode are inserted within the outer electrode.
Claim 18
Dependent Claim
48 words
A method as claimed in claim 11,which includes the steps of (i) positioning the insulating element about the inner electrode, and then (ii) stretching the insulating element in the axial direction to reduce its external diameter before it and the inner electrode are positioned within the outer electrode.
Claim 19
Dependent Claim
19 words
Amethod as claimed in anyone of claims 11 to 15, wherein the insulating element comprises a cross-linked polymeric material.
Claim 20
Independent Claim
27 words
A method as claimed in anyone of claims 11 to 16, wherein the insulating element is dimensional- ly heat-recoverable and is caused to recover by heating it.
Claim 21
Independent Claim
31 words
A method of forming an electrocautery needle, substantially as hereinbefore described with reference to, and as shown in Figures 3A to 3D or Figures 4A to 4C of the accompanying drawings.
Claim 22
Independent Claim
31 words
A method of forming an electrocautery needle, substantially as hereinbefore described with reference to, and as shown in Figures 3A to 3D or Figures 4A to 4C of the accompanying drawings.
Claim 23
Dependent Claim
52 words
An electrocautery needle that has been formed by a method as claimed in any one of claims 11 to 18. Printed for Her Majesty's Stationery Office, by Croydon Printing Company limited, Croydon, Surrey, 1983. Published by The Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.
References Cited (Backward Citations)
No citation records indexed.
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