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US 12,059,734 B2Granted
Hole saw with circular sidewall openings
AssigneeMilwaukee Electric Tool Corporation
InventorsPeter Russell Heath, Christopher J. Rechlin
Life of this patent
Estimating the term…
Abstract
A hole saw including a plurality of sidewall openings is provided. The sidewall openings are shaped and grouped in patterns that improve debris ejection of the hole saw, and that allows for easy access to the interior of the hole saw for manual debris removal by the user. The opening groups are space from each other by larger uninterrupted areas such that the hole saw has a high strength despite the number and size of openings provided in the saw sidewall.
Claims24
A hole saw, comprising:
- an endcap;
- and
- a sidewall, the sidewall comprising:
- a cutting edge at a first end;
- a second end opposite the cutting edge, the second end coupled to the endcap;
- a first circular opening extending through the sidewall;
- and
- a first partial circular opening extending through the sidewall, the first partial opening comprising an arc portion and a straight portion extending in a line from a first end of the arc to a second end of the arc, wherein a first distance between the straight portion and the cutting edge is less than a second distance between the arc portion and the cutting edge;
- wherein the first partial circular opening has a smaller area than the first circular opening;
- and
- wherein the first partial circular opening is spaced a distance from the cutting edge such that there is solid area in a longitudinal direction of the sidewall between the first partial circular opening and the cutting edge.
8 more elements
A hole saw, comprising:
- an endcap forming a base and configured to couple to an arbor;
- and
- a cylindrical sidewall extending along a longitudinal axis and coupled to the endcap, the sidewall comprising:
- a cutting edge at a first end;
- a second end opposite the cutting edge, the second end is coupled to the endcap;
- a first group of circular openings comprising a first circular opening and a first partial circular opening that extend through the sidewall, wherein the first circular opening is located closer to the cutting edge than the first partial circular opening, and the first partial circular opening has a smaller area than the first circular opening, the first group of circular openings defining a first longitudinal tangent line that is parallel to the longitudinal axis and tangential to one of the circular openings of the first group;
- a second group of circular openings comprising a second circular opening and a second partial circular opening that extend through the sidewall, the second group of circular openings defining a second longitudinal tangent line that is parallel to the longitudinal axis and tangential to one of the circular openings of the second group;
- and
- a solid area between the first and second groups of circular openings, the solid area extending without openings in a circumferential direction between the first and second longitudinal tangent lines and in a longitudinal direction from the second end to the cutting edge.
6 more elements
A hole saw, comprising:
- an endcap configured to couple to an arbor;
- and
- a cylindrical sidewall coupled to the endcap, the sidewall comprising:
- a cutting edge at a first end;
- a second end opposite the cutting edge, the second end coupled to the endcap;
- a first group of openings comprising a circular opening, a first partial circular opening, and a second partial circular opening that each extend through the sidewall, the first partial circular opening comprises an arc portion and a straight portion extending in a line from a first end of the arc to a second end of the arc, wherein the first partial circular opening is located closer to the cutting edge than the second partial circular opening, and wherein the first partial circular opening has a smaller area than the first circular opening;
- a second group of openings comprising a second circular opening, a third partial circular opening, and a fourth partial circular opening that each extend through the sidewall, wherein the third partial circular opening is located closer to the cutting edge than the fourth partial circular opening;
- and
- a solid area between the first and second groups of circular openings, wherein the solid area is a contiguous, unbroken section of material that extends without openings in a circumferential direction from the first group of openings to the second group of openings and in a longitudinal direction from the second end to the cutting edge.
6 more elements
Dependencies are inferred from the claim text.