Curved blades for reciprocating saws

• US 5,119,708 A
• Filed: 04/17/1991
• Issued: 06/09/1992
• Est. Priority Date: 04/17/1991
• Status: Expired due to Fees

• Current Assignee: Joseph Musgrove
• Original Assignee: Joseph Musgrove
• Inventors: Musgrove, Joseph
• Primary Examiner(s): Watts, Douglas D.
• Assistant Examiner(s): Dexter, Clark F.
• Application Number:
  US07/686,337
• Time in Patent Office: 419 Days
• Field of Search: 83/852, 83/847, 83/835, 83/697, 83/846, 83/848, 30/392, 30/393, 30/394, 30/314, 30/345, 30/350, 30/356, 30/502, 30/355, 606/176, 606/177, 606/178, 76/112, 76/25.1, 76/101.1
• US Class Current: 83/835
• CPC Class Codes: B23D 61/123 Details of saw blade body
• CPC Class Codes: B23D 61/128 Sabre saw blades
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/9454 Reciprocable type

Abstract

This invention relates to saw blades for use in reciprocating hand-manipulated saws. The blades of the invention have a straight, untoothed edge lying parallel to the longitudinal axis of the blade and a toothed edge wherein at least 30% of the toothed edge is curved.

Claims

1. A blade with a shank adapted to fit into a reciprocating saw, said blade having an untoothed edge lying parallel to the longitudinal axis of the blade and a saw-toothed edge wherein only 30% to 60% of the of the toothed edge is curved, said untoothed edge and said saw-toothed edge essentially converging to a point at the end of the blade.

2. A blade of claim 1 wherein only 40% to 60% of said saw-toothed edge of the blade is curved.

7. A blade of claim 1 having a thickness of 0.08 to 0.095 inches at the untoothed edge.

8. A blade of claim 1 having a hardness of 50 to 52 on the Rockwell scale.

9. A blade of claim 1 wherein the saw-teeth are alternately oppositely faced.

10. A blade of claim 1 wherein the blade has a thickness of 0.090 to 0.125.

3. A blade of claim 16 wherein only 45% to 55% of said saw-toothed edge is curved.

4. A blade of claim 3 having a thickness of 0.08 to 0.095 inches at the untoothed edge and a hardness of 50 to 52 on the Rockwell scale.

5. A blade of claim 4 having 5 to 8 teeth to the inch.

6. A blade of claim 4 wherein the saw-teeth are alternately oppositely faced.