Saws and blades therefor

• US 3,977,289 A
• Filed: 04/24/1975
• Issued: 08/31/1976
• Est. Priority Date: 01/08/1973
• Status: Expired due to Term

• Current Assignee: British Technology Group Ltd.
• Original Assignee: National Research Development Corporation
• Inventors: Tuke, Michael Anthony
• Primary Examiner(s): Schran, Donald R.
• Application Number:
  US05/571,397
• Time in Patent Office: 495 Days
• Field of Search: 83/835, 83/698, 83/697, 30/392, 145/35 E, 145/108 R, 145/108 A, 145/108 B, 145/31 R, 145/31 AB
• US Class Current: 83/835
• CPC Class Codes: A61B 17/142 with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
• CPC Class Codes: A61B 17/144 with cutting edges at the side of the saw blades
• CPC Class Codes: A61B 2017/00544 pneumatically
• CPC Class Codes: B23D 49/165 with means to move the saw blades in an orbital path
• CPC Class Codes: B23D 61/126 having cutting teeth along both edges
• CPC Class Codes: B23D 61/128 Sabre saw blades
• CPC Class Codes: B27B 19/006 with oscillating saw blades; Hand saws with oscillating saw blades
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/9454 Reciprocable type
• CPC Class Codes: Y10T 83/9481 Tool is single element reciprocable along elongate cutting edge [e.g., saw blade, etc.]

Abstract

A powered saw developed for use in orthopaedic surgery has a strip-form blade carrier projecting from a casing in which it is driven at its inner end in an orbiting manner while further towards the carrier free end the carrier is constrained to allow longitudinal translation and pivotal movement. In consequence, the free end of the carrier, and all points of a blade projecting therefrom, are also subjected to an orbital motion. By appropriate location of teeth the blade can therefore cut in any combination of both sideways directions and also at its tip, and preferably has non-symmetrical teeth which are all raked in the same sense around the edge of the blade.

Claims

1. A saw blade of strip form having a plurality of teeth extending in a sequence at least along both side edges and one end edge thereof, said teeth each being of nonsymmetrical form raked in a common direction around the blade.

2. A blade according to claim 1 which is longitudinally slotted in laterally off-set manner at its other end from said one end, and is formed with a hole adjacent said slot but laterally off-set in the opposite sense from said slot.