Hole saw

Patent metadata

Field	Value
Publication number	US-11173552-B2
Application number	US-202016785509-A
Country	US
Kind code	B2
Filing date	Feb 7, 2020
Priority date	Jul 18, 2012
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A hole saw including a cylindrical body with an outer wall extending along an axis of rotation from a cap end to a cutting end. The cutting end includes a plurality of cutting teeth disposed continuously around a circumference of the cutting end. The hole saw includes at least one elongated aperture disposed along the outer wall of the cylindrical body that is configured to receive a tool for removing one or more plugs from within the cylindrical body. The at least one elongated aperture has a first slot portion disposed adjacent to the cutting end and substantially parallel to the cap end, a second slot portion connected to the first slot portion at a first end of the second slot portion, and a third slot portion coupled to the second slot portion at a second end of the second slot portion opposite the first end.

First claim

What is claimed is:

1. A hole saw comprising:
a cylindrical body with an outer wall extending along an axis of rotation from a cap end to a cutting end, the cutting end including a plurality of cutting teeth;
an elongated aperture disposed along the outer wall of the cylindrical body that is configured to receive a tool for removing one or more plugs from within the cylindrical body, the elongated aperture having:
a first slot portion disposed adjacent to the cutting end and substantially parallel to the cap end, wherein the first slot portion includes an upper wall and a lower wall, and a portion of the upper wall and a portion of the lower wall are flat and substantially parallel with the cap end,
a second slot portion connected to the first slot portion at a first end of the second slot portion, the second slot portion disposed at a first angle relative to the cap end, and
a third slot portion coupled to the second slot portion at a second end of the second slot portion opposite the first end, the third slot portion disposed at a second angle relative to the cap end extending toward the cap end.

2. The hole saw of claim 1 , wherein the first slot portion, the second slot portion, and the third slot portion are connected via respective upper walls and lower walls.

3. The hole saw of claim 1 , wherein a distance between an upper wall of the third slot portion and the cap end is no greater than 0.2 inches.

4. The hole saw of claim 1 , wherein the first, second, and third slot portions have a width that is substantially the same.

5. The hole saw of claim 1 , wherein the first, second, and third slot portions have different widths.

6. The hole saw of claim 1 , wherein the first angle is between 50.2 degrees and 51.2 degrees.

7. The hole saw of claim 1 , wherein the second angle is between 31.3 degrees and 32.3 degrees.

8. The hole saw of claim 1 , wherein the elongated aperture is a first elongated aperture; and
the hole saw further comprises a second elongated aperture similar to the first elongated aperture, wherein the first and second elongated apertures are disposed on opposite sides of a plane passing through the axis of rotation.

9. The hole saw of claim 1 , wherein the cap end includes:
a main aperture centrally located at the axis of rotation; and
a plurality of holes circumferentially arranged about the axis of rotation.

10. The hole saw of claim 1 , wherein the plurality of cutting teeth are coated with an abrasive coating.

11. The hole saw of claim 1 , wherein each tooth of the plurality of cutting teeth is defined by a leading edge and a trailing edge.

12. The hole saw of claim 1 , wherein the teeth are disposed continuously around a circumference of the cutting end.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Piller Geoffrey R
• Thom Jason M
• Malloy Ryan J
• Taylor Todd A

Classifications

• B23B51/044

  with core holding devices · CPC title

• B23B51/04 Primary

  {Drills} for trepanning · CPC title

• B23B2260/072

  Grooves · CPC title

• B23B2260/082

  Holes · CPC title

• Y10T408/895

  Having axial, core-receiving central portion · CPC title