Sawblade and Hole Saw

Patent metadata

Field	Value
Publication number	US-2023398617-A1
Application number	US-202118044812-A
Country	US
Kind code	A1
Filing date	Sep 6, 2021
Priority date	Sep 22, 2020
Publication date	Dec 14, 2023
Grant date	—

Abstract

A sawblade includes a plurality of wave-shaped teeth formed on a continuous base section of the sawblade. Each of the teeth has a paired tooth base with a tooth base upper face and a hard metal blade arranged thereon. Each tooth base adjoins the hard metal blade arranged thereon in a flush manner on both sides along a longitudinal axis of the base section, and each hard metal blade and each tooth base upper face has two bevels and/or convexly rounded areas extending substantially along the longitudinal axis of the base section, wherein the teeth are designed to be set and/or unset.

First claim

1 . A sawblade comprising:
a plurality of wave-shaped teeth formed on a continuous base section of the sawblade, each tooth of the plurality of teeth having (i) an associated tooth base with a tooth base upper face and (ii) a respective hard metal blade arranged on the tooth base upper face of the associated tooth base, wherein each associated tooth base adjoins the respective hard metal blade in a flush manner on both sides along a longitudinal axis of the base section, wherein each respective hard metal blade and each tooth base upper face has two bevels and/or convexly rounded areas extending substantially along the longitudinal axis of the base section, and wherein each tooth of the plurality of teeth is unset or set.

2 . The sawblade according to claim 1 , wherein the bevels of each respective hard metal blade have substantially the same width.

3 . The sawblade according to claim 1 , wherein the bevels of each tooth have different widths.

4 . The sawblade according to claim 1 , wherein the convex rounded areas have substantially the same radius.

5 . The sawblade according to claim 1 , wherein two directly successive teeth of the plurality of teeth are set in opposite directions to one another along the longitudinal axis.

6 . The sawblade according to claim 1 , wherein:
the plurality of teeth includes a sequence of teeth comprising:
at least one tooth that is unset; and
two teeth which directly follow said at least one tooth along the longitudinal axis, the two teeth being set in opposite directions to one another, and
the sequence is repeated along the longitudinal axis over all the teeth of the plurality of teeth.

7 . The sawblade according to claim 1 , wherein:
the plurality of teeth includes a sequence of teeth comprising:
at least one tooth that is unset;
a first pair of teeth which directly follow said at least one tooth along the longitudinal axis, the teeth of the first pair of teeth being set in opposite directions to one another at a first set angle; and
a second pair of teeth which directly follow the first pair of teeth along the longitudinal axis, the teeth of the second pair of teeth being set in opposite directions to one another at a second set angle, and
the sequence is repeated along the longitudinal axis over all the teeth of the plurality of teeth.

8 . The sawblade according to claim 7 , wherein the first set angle is smaller than the second set angle.

9 . The sawblade according to claim 1 , wherein the respective hard metal blades form a tooth tip above a concave chip space of each tooth, the tooth tips pointing in a cutting direction.

10 . The sawblade according to claim 1 , wherein the respective hard metal blades are fixedly connected to the associated tooth base.

11 . The sawblade according to claim 1 , wherein the base section of the sawblade is formed with a tempered steel, and the respective hard metal blades are formed with a tungsten carbide-cobalt hard metal.

12 . A hole saw comprising:
a sawblade comprising:
a plurality of wave-shaped teeth formed on a continuous base section of the sawblade, each tooth of the plurality of teeth having (i) an associated tooth base with a tooth base upper face and (ii) a respective hard metal blade arranged on the tooth base upper face of the associated tooth base,
wherein each associated tooth base adjoins the respective hard metal blade in a flush manner on both sides along a longitudinal axis of the base section, wherein each respective hard metal blade and each tooth base upper face has two bevels and/or convexly rounded areas extending substantially along the longitudinal axis of the base section, wherein each tooth of the plurality of teeth is unset or set, and wherein the sawblade is bent substantially into a ring.

13 . The sawblade according to claim 10 , wherein the respective hard metal blades are joined thermally to the associated tooth base.

Assignees

• Bosch Gmbh Robert

Inventors

• Ding Donghui
• Grolimund Daniel

Classifications

• B23D61/04

  with inserted saw teeth {, i.e. the teeth being individually inserted} · CPC title

• B23D61/14 Primary

  with inserted saw teeth {, i.e. the teeth being individually inserted} · CPC title

• B23D61/127

  of special material · CPC title

• B23B51/04

  {Drills} for trepanning · CPC title