Electrosurgical forceps

• US 4,041,952 A
• Filed: 03/04/1976
• Issued: 08/16/1977
• Est. Priority Date: 03/04/1976
• Status: Expired due to Term

• Current Assignee: Valleylab Inc. (Medtronic Plc)
• Original Assignee: Valleylab Inc. (Medtronic Plc)
• Inventors: Morrison, Charles F. Jr., Puszman, Alan Z.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/664,061
• Time in Patent Office: 530 Days
• Field of Search: 128/303.13, 128/303.14, 128/303.17, 128/303.18, 128/404, 128/405, 200/61.58 R, 200/157
• US Class Current: 606/42
• CPC Class Codes: A61B 17/30 Surgical pincettes without pivotal connectionsfor holding suture needles or materials A61B17/0483; wound clamps A61B17/08 ; hand-held gripping tools without pivotal connections in general B25B9/02
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 2018/00922 by switching or controlling the treatment energy directly within the hand-piece

Abstract

An electrosurgical forceps including a switching member disposed on only one tine thereof where the switching member may be disposed on the outside of the tine to permit operation thereof independent of the closing of the forceps or where the switching member is disposed on the inside of the tine such that the electrical contacts thereof are provided with an electrically insulative covering. There are also provided unique circuit paths on the tines whereby the forceps may be operated in either a monopolar mode with or without switching or a bipolar mode with or without switching. Also disclosed is a spacer for separating the tines and a removable sleeve which snaps over the spacer to hold the tines in place. Further, there is disclosed a double molding method for constructing an electrosurgical forceps or the like.

Claims

1. An electrosurgical forceps comprising:

a first tine having a distal end and a proximal end;

a second tine having a distal end and a proximal end, said first and second tines being flexibly mounted with respect to each other with said distal ends being adjacent one another;

switching means mounted on only one of said tines, said switching means being manually operable to effect the closure thereof and comprising a first conductive member mounted with respect to and extending substantially perpendicularly from said one tine and a second conductive member comprising a flexible member concentrically disposed about and spaced from said first member and mounted with respect to said one tine so that said switching means may be manually closed by applying pressure to said flexible member until it engages said first member;

first and second electrically conductive contacts mounted on said one tine respectively contacting said first member and said flexible member of the switching means, said contacts being adapted for connection to an electrosurgical energy source; and

means disposed on said distal ends of said tines for applying said electrosurgical energy to a patient through said contacts upon closure of said switching means.

2. A forceps as in claim 1 wherein said forceps further include a flexible, electrically insulative covering enclosing said contacts to prevent exposure thereof.

3. A forceps as in claim 1 where said means for applying electrosurgical energy to said patient includes (a) a first terminal disposed at the proximal end of said one tine, (b) a second terminal disposed at the proximal end of said tine, (b) a second terminal disposed at the proximal end of said one tine, (c) a third terminal disposed at the proximal end of the other tine, (d) a first electrically conductive path disposed on and extending from said distal end of said one tine to said first terminal at the proximal end thereof, one of said first and second conductive members being electrically connected at its conductive contact to said first electrically conductive path, (e) a second electrically conductive path disposed with respect to said one tine extending from said second terminal disposed at said proximal end thereof to the conductive contact of the other conductive member of said switching means, and (f) a third electrically conductive path disposed with respect to the other tine and extending from said distal end thereof to said third terminal located at the proximal end thereof

the foregoing arrangement of circuit paths enabling said forceps to be used either in a monopolar mode with or without switching or a bipolar mode with or without switching.

4. A forceps as in claim 1 where said first tine has at least one opening disposed at the proximal end thereof;

said second tine has at least one opening disposed at the proximal end thereof; and

said forceps includes a spacer member for separating said first and second tines disposed therebetween at said proximal ends thereof, said spacer member having outwardly projecting pins respectively extending through said openings in said tines; and

a removable sleeve having distal and proximal ends and first and second openings extending through the distal end thereof, said sleeve being removably disposed about the proximal ends of said tines and said pins respectively extending through said first and second openings of the sleeve to removably hold said tines in place

5. A forceps as in claim 4 where said spacer member has a proximal end and includes a strain-relief member extending from the proximal end thereof and said sleeve having an opening in the proximal end thereof, said first and second tines each having connecting means for establishing an electrical connection to said means for applying electrosurgical energy and said forceps including an electrical cord, said cord extending through the opening in the proximal end of said sleeve and electrically connected to the connecting means of said first and second tines, said strain-relief member engaging said cord to provide strain relief therefor.

6. A forceps as in claim 1 where said one tine has an outside surface and said switching means is mounted on the outside surface of said one tine.

7. A forceps as in claim 6 where said first member is a post and said flexible member is a coil spring concentrically disposed about said post.

8. A forceps as in claim 1 where said one tine has an inside surface and said switching means is mounted on the inside surface of said one tine.

9. A forceps as in claim 8 where said first member is a first coil spring and said flexible member is a second coil spring concentrically disposed about said first coil spring.

10. A forceps as in claim 1 where said first member is flexible.

11. A forceps as in claim 10 where said first member is a coil spring.

12. A forceps as in claim 1 where said flexible member is a coil spring.

13. A forceps as in claim 12 where said first member is also a coil spring.