Cutter adapted for use with a power tool

Patent metadata

Field	Value
Publication number	US-12434401-B2
Application number	US-202217973708-A
Country	US
Kind code	B2
Filing date	Oct 26, 2022
Priority date	Dec 30, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A cutter includes a main body, a cog assembly, and a blade. The main body is provided with an anvil. The cog assembly includes a drive shaft and a first and a second cog. The drive shaft is rotatably connected to the main body. The drive shaft has a first end configured to detachably connect which a power tool. The first cog moves synchronously with the drive shaft. The second cog is rotatably connected to the main body and rotates upon rotation of the first cog. The blade is rotatably connected to the main body and connected to the second cog. The blade is rotatable between a deployment position and a cutting position and has a cutting edge. The cutting edge is disposed away from the anvil when the blade is in the deployment position, but is adjacent to the anvil when the blade is in the cutting position.

First claim

What is claimed is:

1. A cutter adapted for use with a power tool comprising:
a housing assembly including an anvil;
a cog assembly including a drive shaft and a first and a second cog, a first intermediate cog, a second intermediate cog and a third intermediate cog, wherein the drive shaft is rotatably connected to the housing assembly, wherein the drive shaft has a first end configured to detachably connect with the power tool, wherein the first cog is disposed on the drive shaft and moves synchronously with the drive shaft, wherein the second cog is rotatably connected to the housing assembly and rotates upon rotation of the first cog, wherein the first and the second intermediate cogs are rotatably connected to the housing assembly in a manner that allows them to rotate synchronously about a same axis, wherein the first intermediate cog and the first cog are engaged with each other, wherein the second cog and the second intermediate cog are interlinked with each other by the third intermediate cog such that the second intermediate cog is not in contact with the second cog and the third intermediate cog is engaged between the second cog and the second intermediate cog, wherein the second cog, the second intermediate cog, and the third intermediate cog are configured to provide a mechanical advantage between the drive shaft and the second cog, and wherein the second intermediate cog and the first cog are arranged at opposite sides of the first intermediate cog; and
a blade connected to the cog assembly, wherein the blade is rotatably connected to the housing assembly and connected to the second cog in a manner that rotates synchronously with the second cog, wherein the blade has a cutting edge selectively cutting the object to be cut by the cutter, wherein the blade is rotatable between a deployment position and a cutting position with respect to the object, and wherein the cutting edge is disposed away from the anvil when the blade is in the deployment position, but is adjacent to the anvil when the blade is in the cutting position.

2. The cutter as claimed in claim 1 further comprising a clamping device configured to selectively clamp and release the object, wherein the clamping device is rotatably connected to the housing assembly and being rotatable between a clamping position and a release position with respect to the object, wherein the clamping device is adjacent to the blade, wherein the clamping device is rotatable about a rotation axis and has a holding portion at a first end and an operating portion at a second end, and wherein the holding portion is disposed adjacent to the anvil when the clamping device is in the clamping position, but is away from the anvil when the clamping device is in the release position.

3. The cutter as claimed in claim 2 , wherein the clamping device is attached to a resilient member, wherein the resilient member applies a force opposite to a force causing rotation of the clamping device, and wherein the resilient member has a first end connected to the clamping device and a second end connected to the anvil.

4. The cutter as claimed in claim 1 , wherein the cog assembly includes a pawl selectively engaged with and disengaged from the second cog, wherein the pawl is rotatably connected to the housing assembly and being rotatable between an engaged position and a disengaged position with respect to the second cog, wherein when the pawl is in the engaged position, the second cog is rotatable in a first direction and unrotatable in a second direction opposite the first direction such that the blade is limited to be rotatable from the deployment position to the cutting position, wherein when the pawl is in the disengaged position, the second cog is rotatable in the first and the second directions, and wherein the pawl is operably connected to a switch, and wherein the switch is movably connected to and protrudes out of the housing assembly.

5. The cutter as claimed in claim 4 , wherein the cog assembly includes a first spring configured to bias the pawl between the engaged position and the disengaged position with respect to the second cog, and wherein the first spring has a first end supported on the pawl and a second end supported on the housing assembly.

6. The cutter as claimed in claim 1 further comprising a second rotatable shaft rotatably and detachably connected to the housing assembly, wherein the second cog and the blade are connected to the second rotatable shaft such that when the second rotatable shaft rotates, the second cog and the blade rotate synchronously with and about the second rotatable shaft, wherein the second cog has a first hole configured for receiving the second rotatable shaft, wherein the blade has a perforation configured for receiving the second rotatable shaft, wherein when the second rotatable shaft is connected to the housing assembly and inserted into the first hole and the perforation, the second cog and the blade rotate synchronously with the second rotatable shaft in response to rotation of the second rotatable shaft, and wherein when the second rotatable shaft is disconnected from the housing assembly, the blade is adapted to be disconnected from the second rotatable shaft and removed in a radial direction from the housing assembly.

7. The cutter as claimed in claim 6 further comprising a cover detachably connected to the housing assembly and adapted to prevent detachment of the second rotatable shaft from the housing assembly, wherein when the cover is connected to the housing assembly, it abuts the second rotatable shaft and disposed opposite to the second cog, and wherein when the cover is disconnected from the housing assembly, the second rotatable shaft is adapted to be detached from the housing assembly.

8. The cutter as claimed in claim 6 , wherein the cog assembly includes a reset mechanism configured to provide a driving force to cause the blade to move to the deployment position, wherein the reset mechanism includes a reset member and a spring configured to bias the reset member, wherein the reset member is connected to the second cog in a manner that rotates synchronously with the second cog, wherein the second cog has a flange protruding on a side thereof in a direction along an axial direction of the second rotatable shaft and surrounding the first hole, wherein the reset member has a second hole configured for receiving the flange, wherein the flange is inserted into the second hole for allowing the reset member to rotate synchronously with the second cog, wherein the reset member is connected between the second cog and the blade, wherein the spring has a first end supported on the reset member and a second end supported on the housing assembly, and wherein the spring is adapted to provide a resilient pulling force to cause the blade to move to the deployment position.

9. The cutter as claimed in claim 1 , wherein the first cog and the first intermediate cog are helical gears, wherein the second cog, the second intermediate cog, and the third intermediate cog are spur gears.

10. The cutter as claimed in claim 1 , wherein the cutting edge includes a first length and a second length extending obliquely to the first length.

11. The cutter as claimed in claim 2 , wherein the cog assembly includes a pawl selectively engaged with and disengaged from the second cog, wherein the pawl is rotatably connected to the housing assembly and being rotatable between an engaged position and a disengaged position with respect to the second cog, wherein when the pawl is in the engaged position, the second cog is rotatable in a first direction and unrotatable in a second direction opposite the first direction such that the blade is limited to be rotat

Assignees

• Hong Ann Tool Ind Co Ltd

Inventors

• Su Cheng-Wei

Classifications

• B26D3/169

  Hand held tube cutters · CPC title

• B26D2001/0066

  having shearing means, e.g. shearing blades, abutting blades · CPC title

• B26D7/02

  with clamping means {(B26D7/018 takes precedence)} · CPC title

• B26D2007/013

  the work being tubes, rods or logs · CPC title

• B26D1/0006 Primary

  Cutting members therefor · CPC title