Saw

• US 4,856,193 A
• Filed: 01/31/1989
• Issued: 08/15/1989
• Est. Priority Date: 07/24/1987
• Status: Expired due to Fees

• Current Assignee: Ronald A. Grachan
• Original Assignee: Ronald A. Grachan
• Inventors: Grachan, Ronald A.
• Primary Examiner(s): Watts, Douglas D.
• Application Number:
  US07/304,875
• Time in Patent Office: 196 Days
• Field of Search: 30/166 R, 30/502, 30/520-522, 30/517, 83/851-855, 76/112
• US Class Current: 30/166.3
• CPC Class Codes: B23D 51/01 characterised by the handle
• CPC Class Codes: B23D 61/12 Straight saw blades; Strap saw blades
• CPC Class Codes: B23D 61/123 Details of saw blade body
• CPC Class Codes: Y10T 83/9362 Teeth having transversely curved cutting edge

Abstract

A novel saw is disclosed having novel dimensions and tooth pattern for the saw to cut efficiently through bone and wood. The saw includes a plurality of teeth disposed upon the cutting edge of the saw blades. The teeth are set with a bevel of about 3° to 15° and with two steps of about 1/4 to 1/8 inch and with a spacing of tip-to-tip between continguous teeth of about 1/8 to 3/8 inch. The blade is selected of material having dimension and hardness for the blade to yield to bend in a generally semicircular bend.

Claims

1. A saw adapted for a plurality of uses including sawing wood and bone, comprising:

a planar blade having a cutting edge;

a handle secured to said blade;

a plurality of saw teeth disposed on said cutting edge in a predetermined pattern with each of said teeth extending from a base to a tip, said tips of said teeth set from side walls of said blade by a predetermined amount, said teeth having a depth measured from a base to tip of about 1/4 to about 3/8 inch and a spacing of tip-to-tip between contiguous teeth of about 1/8 to 3/8 inch;

said saw including teeth alternately set away from opposite sides of said blade with teeth curving from said blade to said tips and with blade tips provided with a slope

said teeth are provided with said slope set at a bevel of 3°

to 15°

.

2. A saw according to claim 1 wherein opposing edges of contiguous teeth define an angle of about 60°

.

3. A saw according to claim 1 wherein said set equals about 1/6 inch.

4. A saw according to claim 1 wherein said blade is selected to have a length extending between free ends of said blade, said length selected for said blade to be flexed in a semicircular arc.

5. A saw according to claim 1 wherein said blade has a width of about 2 inches.

6. A saw according to claim 1 wherein said blade is formed of steel of predetermined gauge having a selected hardness of about Rockwell 42.

7. A saw according to claim 5 wherein said gauge is preferably 18 gauge.

8. A saw according to claim 1 wherein said bevel is 10°

.