Deflectable finger connection feature on surgical saw blade

Patent metadata

Field	Value
Publication number	US-9603603-B2
Application number	US-201514599753-A
Country	US
Kind code	B2
Filing date	Jan 19, 2015
Priority date	Feb 6, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A surgical cutting blade for cutting bone material when the blade is coupled to a hand-held surgical saw includes a distal portion comprising a plurality of cutting teeth, a shank portion adjacent the distal portion, and a proximal portion adjacent the shank portion. The proximal portion may include a longitudinally extending slot having a proximal opening. The slot may be shaped to receive a portion of the surgical saw through the proximal opening. The proximal portion may have a plurality of deflectable fingers respectively separated from a plurality of main body portions by respective gaps. The plurality of deflectable fingers may extend adjacent the longitudinally extending slot, and may deflect into the gaps to increase and decrease a width of a portion of the slot.

First claim

What is claimed is:

1. A method of attaching a blade to a hand-held surgical tool, the method comprising:
opening a collet fixture of the hand-held surgical tool to create a space for reception of a proximal end of the blade;
introducing a shank of the collet fixture into a first opening having a slot at the proximal end of the blade, wherein the first opening and slot is defined at least partially by one or more fingers at the proximal end of the blade, wherein the introducing of the shank comprises deflecting the one or more fingers with the shank into one or more corresponding gaps formed within the first opening and slot from a first state to a second state; and
advancing the shank into the first opening and radially beyond ends of the one or more fingers, such that the one or more fingers return to the first state after deflecting within the one or more corresponding gaps formed within the first opening and slot, wherein while the one or more fingers are in the first state and the shank is in the first opening and slot, the blade is provisionally secured to the shank by at least the one or more fingers.

2. The method of claim 1 , further comprising closing the collet fixture to capture the blade between clamping surfaces of the collet fixture, wherein the blade is fully secured to the collet fixture when the collet fixture is in a closed state.

3. The method of claim 2 , wherein:
the closing of the collet fixture comprises inserting protrusions through a plurality of openings in the blade to fully secure the blade to the collet fixture; and
the plurality of openings do not include the first opening.

4. The method of claim 1 , wherein:
the introducing of the shank comprises deflecting two opposed fingers defining an edge of the slot into two opposed gaps formed within the first opening and slot; and
the two opposed gaps extend adjacent the two opposed fingers and are defined by the two opposed fingers and opposed internal body portions of the blade.

5. The method of claim 1 , wherein:
the one or more fingers are in a neutral position prior to the introducing of the shank into the first opening;
the introducing of the shank comprises deflecting the one or more fingers outward away from a center point of the first opening; and
the advancing of the shank into the first opening comprises moving the shank along a longitudinal axis of the blade until the shank is fully seated in the first opening and slot and the one or more fingers are no longer deflected outward and are returned to the neutral position.

6. The method of claim 1 , wherein:
the advancing of the shank into the first opening comprises gripping the shank with one or more protrusion elements of the one or more fingers; and
the one or more protrusion elements are disposed at one or more ends of the one or more fingers and extend inward in a transverse direction toward a longitudinal axis of the blade.

7. The method of claim 1 , further comprising engaging a plurality of members of the collet fixture with a plurality of openings of the blade, wherein the plurality of openings do not include the first opening, wherein the plurality of openings are spaced radially about a center point of the first opening.

8. The method of claim 7 , wherein:
the plurality of openings comprise
a second opening surrounded by a first portion of the blade, and
a third opening on an outer periphery of the blade; and

a second portion of the blade transitions from a side of the third opening to a perimeter of the blade via a curved edge.

9. The method of claim 1 , further comprising viewing cutting with the blade through a window formed in a distal portion of the blade.

10. The method of claim 1 , wherein deflecting the one or more fingers with the shank into the one or more corresponding gaps formed within the first opening and slot further includes deflecting one or more arcuate shaped fingers defining a semi-circular edge of the slot.

11. The method of claim 1 , wherein deflecting the one or more fingers with the shank into the one or more corresponding gaps formed within the first opening and slot further includes deflecting one or more straight deflectable fingers having protrusions on a distal end of the one or more fingers.

12. A method of attaching a blade to a hand-held surgical tool, the method comprising:
introducing a first opening having a slot formed in the blade to a shank of the hand-held surgical tool, wherein the introducing of the first opening and slot of the blade to the shank comprises deflecting one or more fingers of the blade, wherein the first opening and slot are defined at least partially by the one or more fingers, wherein the deflecting of the one or more fingers comprises moving the fingers from a first state and outward relative to a center point of the first opening to a second state into one or more corresponding gaps formed within the first opening and slot; and
advancing the blade towards the shank, such that (i) the shank is further received and fully seated in the first opening and slot, and (ii) the fingers return to the first state and out of the one or more gaps formed within the first opening and slot, wherein while the fingers are in the first state and the shank is fully seated in the first opening and slot, the blade is provisionally secured to the shank by at least the one or more fingers.

13. The method of claim 12 , further comprising:
opening a collet fixture of the hand-held surgical tool;
receiving a proximal portion of the blade in the collet fixture to introduce the proximal portion of the blade to the shank; and
closing the collet fixture to capture the blade between clamping surfaces of the collet fixture, wherein the blade is fully secured to the collet fixture when the collet fixture is in a closed state.

14. The method of claim 13 , wherein:
the closing of the collet fixture comprises inserting protrusions through a plurality of openings in the blade to fully secure the blade to the collet fixture; and
the plurality of openings do not include the first opening.

15. The method of claim 12 , wherein:
the introducing of the first opening and slot of the blade comprises deflecting two opposed fingers defining an edge of the slot into two opposed gaps formed within the first opening and slot; and
the two opposed gaps extend adjacent the two opposed fingers and are defined by the two opposed fingers and opposed internal body portions of the blade.

16. The method of claim 12 , wherein:
the one or more fingers are in a neutral position prior to the introducing of a proximal portion of the blade to the shank; and
the advancing of the blade comprises radially moving the blade towards the shank until the shank is fully seated in the first opening and slot and the one or more fingers are no longer deflected outward and are returned to the neutral position.

17. The method of claim 12 , wherein:
the advancing of the blade comprises gripping the shank with one or more protrusion elements of the one or more fingers; and
the one or more protrusion elements are disposed at one or more ends of the one or more fingers and extend inward in a transverse direction toward a longitudinal axis of the blade.

18. The method of claim 12 , further comprising engaging a plurality of members of a collet fixture of the hand-held surgical tool with a plurality of openings of the blade, wherein the plurality of openings do not include the first opening, wherein the plurality of openings are spaced radially about a center point of the first opening.

Assignees

• Medtronic Ps Medical Inc

Inventors

• Wang John Xinghai
• Bach Hung Van
• Burnette Donna J
• Blackwell Walter Raymond
• Chen Weiguo
• Dexter S Shane
• Garadi Vikram August
• Haney Kevin L
• Lopez Joseph William
• Sherry R Mitchell
• Cihak Paul
• Tidwell Durrell

Classifications

• B27B5/32

  Devices for securing circular saw blades to the saw spindle · CPC title

• B23D61/006

  Oscillating saw blades · CPC title

• Y10T29/49876

  by snap fit · CPC title

• A61B2017/00526

  Methods of manufacturing · CPC title

• A61B17/142 Primary

  with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades · CPC title