Mounting arbor for saw cutting blades

• US 5,303,688 A
• Filed: 04/03/1992
• Issued: 04/19/1994
• Est. Priority Date: 04/03/1992
• Status: Expired due to Term

• Current Assignee: Soff-Cut International Incorporated
• Original Assignee: Alan R. Chiuminatta, Edward Chiuminatta
• Inventors: Chiuminatta, Edward R., Chiuminatta, Alan R.
• Primary Examiner(s): Rose, Robert A.
• Application Number:
  US07/863,708
• Time in Patent Office: 746 Days
• Field of Search: 51/168, 51/206.4, 51/206 R, 51/DIG. 12, 83/676, 125/13.01, 125/15
• US Class Current: 125/15
• CPC Class Codes: B23D 61/025 Details of saw blade body
• CPC Class Codes: B27B 5/32 Devices for securing circular saw blades to the saw spindle
• CPC Class Codes: Y10T 83/9403 Disc type

Abstract

A mounting for use in mounting rotating cutting blades to the drive shaft of saws is provided. The mounting is an arbor or arbor sleeve having a non-symmetrical outer mounting surface onto which is mounted a cutting blade which contains a similarly configured mounting hole. The arbor or arbor sleeve is designed for use with a cutting blade having a mounting hole which, when viewed from one side of the blade is the same as the outer surface mounting surface, and which viewed from the other side of the blade is not the same. The use of the arbor or arbor sleeve of the present invention with a cutting blade having these characteristics results in the blade being mounted on the saw in only one orientation.

Claims

1. A cutting blade for use with a concrete cutting saw having a drive shaft with a blade mounting member for a rotating concrete cutting blade, said cutting blade having a first and second side, comprising:

a mounting hole at the center of the blade, said mounting hole having a shape which when viewed from the first side has a center point with a horizontal axis and vertical axis therethrough, a first corner with a radius of about 3.4 mm, said radius extending from a point located in front of the vertical axis and about 12.4 mm from the center point and at an angle of about 0 degrees from the horizontal axis, a second corner with a radius of about 4.1 mm, said radius extending from a point located behind the vertical axis and about 11.4 mm from the center point and at an angle of about 54 degrees above the horizontal axis, a third corner with a radius of about 3.6 mm, said radius extending from a point located behind the vertical axis and about 11.0 mm from the center point and at an angle of about 66 degrees below the horizontal axis, a first side which tangentially connects the outside of said first and second sides, a second side which tangentially connects the outside of said second and third sides, and a third side which is arcuate, having a radius of about 27.8 mm and which tangentially connects the outside of said first and third sides.

2. A cutting blade for use with a concrete cutting saw having a drive shaft with a blade mounting member for a rotating conrete cutting blade, said cutting blade having a first and a second side, comprising:

a mounting hole at the center of the blade, said mounting hole having a shape which when viewed from the first side has a center point with a horizontal axis and vertical axis therethrough, a first corner having a radius R1 which emanates from a point located a distance D1 away from the center point in front of the vertical axis and along the horizontal axis, a second corner having a radius R2 such that R2 approximately equals 1.2 R1 which emanates from a point located behind the vertical axis a distance D2 away from the center point and at an angle of about 54 degrees above the horizontal axis, where D2 approximately equals 0.93 D1, a third corner having a radius R3 such that R3 approximately equals 1.06 R1 which emanates from a point located behind the vertical axis a distance D3 away from the center point and at an angle of about 66 degrees below the horizontal axis, where D3 approximately equals 0.89 D1, a first side which tangentially connects the outside of said first and second corners;

a second side which tangentially connects the outside of said second and third corners, and a third side having a radius R4 emanating from a point located in front of the vertical axis a distance D4 away from the center point and at an angle of about 9 degrees above the horizontal axis, such that D4 approximately equals 1.32 D1 and said third side tangentially connects the outside of said first and third corners.

3. A rotating concrete cutting blade having a plurality of concrete cutting segments located about the periphery of a disc, and a hole at the center of the disc for mounting to a motor drive shaft for rotation about a longitudinal axis through the hole, wherein the improvement comprises:

a hole in the blade configured so that it has a generally triangular shape with three sides of unequal length and generally rounded corners joining the sides.

4. A rotating concrete cutting blade as defined in claim 3, wherein said triangular sides comprise two substantially straight sides and one convex side.