LAMINECTOMY FORCEPS

• US 20110071563A1
• Filed: 05/18/2009
• Published: 03/24/2011
• Est. Priority Date: 05/19/2008
• Status: Abandoned Application

• Current Assignee: Alessandro Melozzi
• Original Assignee: Alessandro Melozzi
• Inventors: Magliani, Vincenzo
• Application Number:
  US12/736,869
• Publication Number:
  US 20110071563A1
• Time in Patent Office: Days
• US Class Current: 606/205
• CPC Class Codes: A61B 17/1611 the two jaw elements being integral with respective elongate shaft elements
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/2825 Inserts of different material in jaws
• CPC Class Codes: A61B 2017/2922 toggle linkages
• CPC Class Codes: A61B 2017/2931 with releasable head
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable

Abstract

The present invention relates to a laminectomy forceps (1) that is provided with a lever mechanism composed of at least two, preferably three arms (8, 9, 10) that multiplies the force exerted by the surgeon on the actuation lever (5) of the forceps.

Claims

1. Laminectomy forceps (1) comprising a handle (2) joined to a fixed beak (3) with a sliding tray (4) actuated by an actuation lever (5) in opposite position to the handle (2), in which the fixed beak (3) is provided with a cutting backing end (6) for a cutting end (7) of the tray (4) in order to generate a cutting area and in which the actuation lever (5) is articulated with the tray in such a way to determine sliding,

forceps characterised in that

the actuation lever (5) is articulated to the tray (4) with a force multiplier lever mechanism comprising at least two (8, 10), preferably three arms (8, 9, 10).

2. Forceps as claimed in claim 1, characterised in that the actuation lever (5) actuates a first arm (8) hinged to the handle (2), the first arm (8) being articulated to a second arm (9), the second arm (9) being articulated to a third arm (10), the third arm (10) being hinged to the handle (2) and actuating the tray (4) and in which the first arm (8) and the third arm have an L shape.

3. Forceps as claimed in claim 2, characterised in that the first arm (8) is hinged at one end to the handle (2) by means of a first pin (11) and is provided at the opposite end with a roll (12) free to slide in the inlet (13) obtained on the internal side of the actuation lever (5), and in which the free end of the first arm (8) opposite to the end with the roll (12) is hinged with a second pin (14) to the second arm (9) with free end opposite to the end hinged to the first arm (8), comprising a third pin (15) that slides inside a slot (16) provided on the third arm (10) and in which the free end of the third arm (10) in opposite position to the slot (16), is provided with a sliding guide (18) for a constraint (19) joined to the tray (4) in order to make the tray (4) slide with respect to the fixed beak (3).

4. Forceps as claimed in claim 1 or 2 or 3, characterised in that the actuation lever (5) is hinged on the handle (2) by means of an actuation pin (20).

5. Forceps as claimed in any of the above claims, characterised in that the fixed beak (3) comprises a tool-holder portion (3A) with the cutting backing end (6), the said tool-holder portion (3A) being removably fixed with respect to the fixed beak (3) and in that the tray (4) comprises a tool-holder portion (4A) with the cutting end (7), the said tool-holder portion (4A) being removably fixed with respect to the tray (4).

6. Forceps as claimed in claim 5 characterised in that the tool-holder portion (3A) of the fixed beak is fixed removably by means of detachable connection means, such as screws or similar means.

7. Forceps as claimed in claims 5 or 6, characterised in that the tool-holder portions (4A, 3A) are respectively engaged on the tray (4) and on the fixed beak (3) with double-hook engagement means (3B, 3C and 4B, 4C), with the tray (4) protruding from the fixed beak (3) when the forceps is closed and the tool-holder portions (3A and 4A) are disassembled, in such a way to lock in position the tool-holder portion (4A) of the tray when the forceps is open without assembling the tool-holder portion (3A) of the fixed beak (3).

8. Forceps as claimed in one or more of the above claims characterised in that it comprises a cleaning device to clean the tray (4).

9. Forceps as claimed in claim 8, characterised in that the tray (4) has an overturned U cross-section and the cleaning device comprises a rod (21) that slides inside the tray (4).

10. Forceps as claimed in claim 9, characterised in that the rod (21) is actuated by means of a control handle (22) in transversal position to the rod (21), with the control handle (22) sliding in a slot (23) obtained in upper position on the body of the tray (4).

11. Forceps as claimed in claim 8 or 9, characterised in that the rod (21) slides inside a sliding guide that comprises t least one sliding eyelet (24, 25).

12. Forceps as claimed in one or more of claims 8 to 11 characterised in that the rod (21) is provided with autonomous return means, such as a spring (27) or similar means.

13. Forceps as claimed in one or more of the above claims, characterised in that it also comprises automatic return means to open position of the forceps, such as a helicoidal spring or two pivoting metal plates in opposite position (being one fixed to the actuation lever and the other one to the handle), designed to push the actuation lever firmly away from the handle.