Drive mechanism and power tool
AssigneeMilwaukee Electric Tool Corporation
InventorsDavid B. Griep, Richard H. Jungmann, Roger D. Neitzell, Thomas P. James, Thomas R. Bednar, Troy Charles Thorson, David Paul Serdynski
Life of this patent
Estimating the term…
Abstract
A drive mechanism for a power tool. The power tool includes a motor having a drive shaft and an output member adapted to support a tool element. The drive mechanism includes a drive assembly engaged with and driven by the drive shaft and a drive arm drivingly connected between the drive assembly and the output member to transmit driving force from the drive assembly to the output member. The drive arm is configured to absorb an impact.
Claims20
A reciprocating saw comprising:
- a motor including a drive shaft;
- an output member adapted to support a saw blade;
- and
- a drive mechanism including
- a drive assembly engaged with and driven by the drive shaft, and
- a drive arm drivingly connected between the drive assembly and the output member to transmit driving force from the drive assembly to the output member, the drive arm including
- a first portion pivotably coupled to the drive assembly,
- a second portion pivotably coupled to the output member and having a substantially similar shape as the first portion, and
- a flexible member interconnecting the first portion and the second portion,
- wherein the drive arm is pivotally coupled to the drive assembly and the output member about respective first and second parallel axes, wherein at least a portion of the drive arm is rotatable about a third axis substantially parallel with the first and second axes, and wherein the flexible member is configured to absorb an impact.
A reciprocating saw comprising:
- a motor including a drive shaft;
- an output member adapted to support a saw blade;
- and
- a drive mechanism including
- a drive assembly engaged with and driven by the drive shaft, and
- a drive arm drivingly connected between the drive assembly and the output member to transmit driving force from the drive assembly to the output member, the drive arm including
- a first portion pivotably coupled to the drive assembly and including a first hook and a first aperture,
- a second portion pivotably coupled to the output member and including a second hook and a second aperture, and
- a flexible member interconnecting the first portion and the second portion,
- wherein the drive arm is pivotally coupled to the drive assembly and the output member about respective first and second parallel axes, wherein at least a portion of the drive arm is rotatable about a third axis substantially parallel with the first and second axes, wherein the flexible member is configured to absorb an impact, wherein the first hook is at least partially received in the second aperture and the second hook is at least partially received in the first aperture, and wherein the flexible member at least partially surrounds the first and second hooks.
Dependencies are inferred from the claim text.