ELECTROSURGICAL INSTRUMENT

• US 20150216585A1
• Filed: 01/27/2015
• Published: 08/06/2015
• Est. Priority Date: 02/05/2014
• Status: Active Grant

• Current Assignee: Erbe Elektromedizin GmbH (C. Erbe GmbH)
• Original Assignee: Erbe Elektromedizin GmbH (C. Erbe GmbH)
• Inventors: Kirstgen, Udo, Rombach, Thorsten, Alberstetter, Tobias, Ahlburg, Elmar, Buntrock, Volker
• Granted Patent: US 10,194,974 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 18/042 using additional gas becoming plasma
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2018/0091 Handpieces of the surgical instrument or device
• CPC Class Codes: A61B 2018/1475 Electrodes retractable in or deployable from a housing

Abstract

An electrosurgical instrument, in particular for argon plasma coagulation, includes a handpiece 10, an electrode (11) connected to the handpiece (10), a shaft (12) which surrounds the electrode (11) and is held in the handpiece (10), and an operating mechanism (13), which comprises at least one rotary knob (14) arranged on the handpiece (10). The shaft (12) is axially movable relative to the electrode (11) and a shear force can be applied to it by operating the rotary knob (14). The handpiece (10) has a brake device which exerts a braking force on the shaft (12), and the operating mechanism (13) forms a transmission gear (15) which is connected to the shaft (12) for transferring the shear force.

Claims

1. Electrosurgical instrument comprising:

a handpiece,

an electrode connected to the handpiece,

a shaft which surrounds the electrode and is held in the handpiece, and

an operating mechanism which comprises at least one rotary knob arranged on the handpiece,

the shaft being axially movable relative to the electrode and a shear force can be applied to the shaft by operating the rotary knob, wherein the handpiece has a brake device which exerts a braking force on the shaft, and the operating mechanism forms a transmission gear which is connected to the shaft for transferring the shear force.

2. Instrument according to claim 1, wherein the rotary knob comprises a drive gear and at least one driven gear connected torque-resistantly to said drive gear, said driven gear being connected to the shaft for transferring the shear force, the diameter of the driven gear being smaller than the diameter of the drive gear.

3. Instrument according to claim 1, wherein the operating mechanism comprises a slide that is axially movable in a shear direction of the shear force, said slide being connected on one portion to the shaft and on another portion to the transmission gear.

4. Instrument according to claim 3, wherein the slide comprising at least one first toothed rack which is arranged parallel to the shear direction and meshes with the driven gear.

5. Instrument according to claim 4, wherein the slide comprises a second toothed rack parallel to the first toothed rack, the drive gear being arranged between the two toothed racks and being torque-resistantly connected to a further driven gear which meshes with the second toothed rack.

6. Instrument according to claim 3, wherein the handpiece comprises a retaining plate with a linear guide in which the slide is arranged so as to be axially movable, the linear guide having at least one aperture for the slide.

7. Instrument according to claim 1, wherein the brake mechanism comprises a clamping element held in the handpiece and applying braking force to the shaft.

8. Instrument according to claim 6, wherein the brake mechanism comprises a clamping element held in the handpiece and applying braking force to the shaft.

9. Instrument according to claim 1, wherein the operating mechanism comprises a locking device with which the shaft can be fixed in at least one position.

10. Instrument according to claim 9, wherein the locking device comprises at least one first latching means which is arranged on the slide, a second latching means being arranged on the handpiece, in particular on the retaining plate, said latching means being combinable with the first latching means for fixing the shaft.

11. Instrument according to claim 1, wherein the electrode and the shaft are each arranged rotatably about their longitudinal axis relative to the handpiece, the electrode being guided through a sliding sleeve which connects the shaft and the electrode in a torque-resistant and axially movable manner.

12. Instrument according to claim 6, wherein the electrode and the shaft are each arranged rotatably about their longitudinal axis relative to the handpiece, the electrode being guided through a sliding sleeve which connects the shaft and the electrode in a torque-resistant and axially movable manner.

13. Instrument according to claim 12, wherein the sliding sleeve has profiling, at least in sections, on the sliding sleeve'"'"'s inner circumference, said profiling being engaged in a positive-locking manner with corresponding profiling on the electrode, at least in sections, for transferring a torque.

14. Instrument according to claim 12, wherein the sliding sleeve and the slide are rotatably and firmly connected in the axial direction of the sliding sleeve for transferring the shear force, the slide having a retaining ring which surrounds the sliding sleeve at least partially around the circumference.

20. Instrument according to claim 9, wherein the locking device comprises at least one latching device arranged on the slide and a retaining plate arranged on the handpiece, wherein the at least one latching device is configured to combine with the retaining plate to fix the shaft.

15. Electrosurgical instrument comprising:

a handpiece,

an electrode connected to the handpiece,

a shaft which surrounds the electrode and is held in the handpiece, and

an operating mechanism which comprises at least one rotary knob arranged on the handpiece,

the shaft being axially movable relative to the electrode and a shear force can be applied to the shaft by operating the rotary knob, wherein the operating mechanism has a locking device with which the shaft can be fixed in at least one position.

16. Electrosurgical instrument comprising:

a handpiece,

an electrode connected to the handpiece,

a shaft which surrounds the electrode and is held in the handpiece, and

an operating mechanism which comprises at least one rotary knob arranged on the handpiece,

the shaft being axially movable relative to the electrode and a shear force can be applied to the shaft by operating the rotary knob, wherein the electrode and the shaft are each arranged rotatably about their longitudinal axis relative to the handpiece, the electrode being guided through a sliding sleeve which connects the shaft and the electrode in a torque-resistant and axially movable manner.

17. (canceled)

18. (canceled)

19. (canceled)