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US 9,662,720 B2Granted
Cylindrical drill body for a hole saw
AssigneeRobert Bosch GmbH
InventorMartin Richter
Life of this patent
Estimating the term…
Abstract
A cylindrical drill body for a hole saw has cutting teeth on an end side and at least one cutout, which is located in a lateral surface of the cylindrical drill body at a distance from the cutting teeth. The cutout has a rectilinear boundary edge directed parallel to the end side.
Claims15
A cylindrical drill body for a hole saw, comprising:
- cutting teeth located on an end side of the drill body;
- and
- at least two separately formed cutouts located in a lateral surface of the drill body, wherein each cutout in the at least two separately formed cutouts:
- is located at a different axial distance from the end side;
- and
- includes at least one respective boundary edge that is at least sectionally rectilinear and at least substantially parallel to the end side,
- wherein a circumferential width of a cross section of each cutout narrows in a direction toward the cutting teeth,
- wherein each cutout is spaced apart in an axial direction from an adjacent cutout by a respective web of the lateral surface,
- wherein each cutout is spaced apart in the axial direction from the end side,
- wherein the at least two separately formed cutouts are located in the lateral surface such that the circumferential width of each cutout is offset in a circumferential direction from a circumferential width of an adjacent cutout of the at least two separately formed cutouts, and
- wherein each cutout is offset only to an extent such that an imaginary axial line intersects the at least two separately formed cutouts.
8 more elements
A cylindrical drill body for a hole saw, comprising:
- cutting teeth located on an end side of the drill body;
- and
- at least two separately formed cutouts located in a lateral surface of the drill body, wherein each cutout in the at least two separately formed cutouts:
- is located at a different axial distance from the end side;
- and
- includes at least one respective boundary edge that is at least sectionally rectilinear and at least substantially parallel to the end side, wherein:
- a circumferential width of a cross section of each cutout narrows in a direction toward the cutting teeth;
- each cutout is spaced apart in an axial direction from an adjacent cutout by a respective web of the lateral surface;
- each cutout is spaced apart in the axial direction from the end side;
- the at least two separately formed cutouts are located in the lateral surface such that the circumferential width of each cutout is offset in a circumferential direction from a circumferential width of an adjacent cutout of the at least two separately formed cutouts;
- the at least two separately formed cutouts are located in the lateral surface such that an axial length of each cutout is offset from an axial length of the adjacent cutout and the axial length of each cutout fails to overlap the axial length of the adjacent cutout;
- the circumferential width of each cutout overlaps the circumferential width of the adjacent cutout;
- and
- a respective lateral edge of each cutout is oriented with a respective reference line.
11 more elements
A cylindrical drill body for a hole saw, comprising:
- cutting teeth located on an end side of the drill body;
- and
- at least two separately formed cutouts located in a lateral surface of the drill body, wherein each cutout in the at least two separately formed cutouts:
- is located at a different axial distance from the end side;
- and
- includes at least one respective boundary edge that is at least sectionally rectilinear and at least substantially parallel to the end side,
- wherein a circumferential width of a cross section of each cutout narrows in a direction toward the cutting teeth,
- wherein each cutout is spaced apart in an axial direction from an adjacent cutout by a respective web of the lateral surface,
- wherein each cutout is spaced apart in the axial direction from the end side, and
- wherein a first cutout of the at least two cutouts has a first ratio of axial length to circumferential width, a second cutout has a second ratio of axial length to circumferential width, and the first and second ratios are different.
7 more elements
A cylindrical drill body for a hole saw, comprising:
- cutting teeth located on an end side of the drill body;
- and
- at least two separately formed cutouts located in a lateral surface of the drill body, wherein each cutout in the at least two separately formed cutouts:
- is located at a different axial distance from the end side;
- and
- includes at least one respective boundary edge that is at least sectionally rectilinear and at least substantially parallel to the end side,
- wherein a circumferential width of a cross section of each cutout narrows in a direction toward the cutting teeth,
- wherein each cutout is spaced apart in an axial direction from an adjacent cutout by a respective web of the lateral surface,
- wherein each cutout is spaced apart in the axial direction from the end side, and
- wherein a first cutout of the at least two cutouts has a first nominal circumferential width, a second cutout of the at least two cutouts, which is spaced apart from said cutting teeth by a greater distance than the first cutout, has a second nominal circumferential width, and the first nominal circumferential width is greater than the second nominal circumferential width.
7 more elements
A cylindrical drill body for a hole saw, comprising:
- cutting teeth located on an end side of the drill body;
- and
- at least two separately formed cutouts located in a lateral surface of the drill body, wherein each cutout in the at least two separately formed cutouts:
- is located at a different axial distance from the end side;
- and
- includes at least one respective boundary edge that is at least sectionally rectilinear and at least substantially parallel to the end side, wherein:
- a circumferential width of a cross section of each cutout narrows in a direction toward the cutting teeth;
- each cutout is spaced apart in an axial direction from an adjacent cutout by a respective web of the lateral surface;
- each cutout is spaced apart in the axial direction from the end side;
- a first cutout of the at least two cutouts, which is closest to said cutting teeth, has a first edge closest to said cutting teeth, and said first edge is rounded;
- and
- a second cutout of the at least two cutouts, which is further from said cutting teeth than the first cutout, has a second edge closest to said cutting teeth, and said second edge is rectilinear.
9 more elements
Dependencies are inferred from the claim text.