Percussion tool
AssigneeMilwaukee Electric Tool Corporation
InventorsMatthew S. Zawisza, Andrew D. Van Hoorn, Ethan T. Zimany
Life of this patent
Estimating the term…
Abstract
A percussion tool includes a housing, a percussion mechanism including a striker supported for reciprocation in the housing along a first axis, and an anti-vibration system for attenuating vibration in a direction of the first axis. The anti-vibration system includes a linkage coupling the percussion mechanism to the housing. The linkage permits relative movement between the housing and the percussion mechanism along the first axis. The anti-vibration system also includes a counterweight supported by the percussion mechanism for relative movement therewith along a second axis that is parallel with the first axis. The counterweight reciprocates out of phase with the striker to attenuate vibration in the direction of the first axis.
Claims16
A percussion tool comprising:
- a housing;
- a percussion mechanism including a striker supported for reciprocation in the housing along a first axis;
- a crank case for supporting the percussion mechanism within the housing;
- and
- an anti-vibration system for attenuating vibration in a direction of the first axis, the anti-vibration system comprising
- a linkage coupling the percussion mechanism to the housing, the linkage permitting relative movement between the housing and the percussion mechanism along the first axis, the linkage including
- a first swing arm pivotally coupling the crank case to the housing,
- a second swing arm parallel to the first swing arm, the second swing arm pivotally coupling the crank case to the housing,
- wherein the first and second swing arms are coupled to each other by a cross bar extending over the crank case, and
- a counterweight supported by the percussion mechanism for relative movement therewith along a second axis that is parallel with the first axis, the counterweight reciprocating out of phase with the striker to attenuate vibration in the direction of the first axis.
A percussion tool comprising:
- a housing;
- a percussion mechanism including a striker supported for reciprocation in the housing along a first axis;
- a crank case supporting the percussion mechanism within the housing;
- and
- an anti-vibration system for attenuating vibration in a direction of the first axis, the anti-vibration system comprising
- a linkage coupling the percussion mechanism to the housing, the linkage permitting relative movement between the housing and the percussion mechanism along the first axis, the linkage including
- a first swing arm pivotally coupling the crank case to the housing, and
- a second swing arm pivotally coupling the crank case to the housing, the second swing arm being parallel with the first swing arm,
- a third swing arm pivotally coupling the crank case to the housing, the third swing arm extending around the crank case,
- a leaf spring arranged between the housing and the crank case, and
- a foam bumper arranged between the housing and the crank case, wherein each of the leaf spring and the foam bumper attenuates vibration transmitted to an operator through the crank case and the housing,
- wherein the first and second swing arms pivot about a third axis and the third swing arm pivots about a fourth axis, and wherein the fourth axis is parallel to the third axis.
A percussion tool comprising:
- a housing;
- a percussion mechanism including a striker supported for reciprocation in the housing along a first axis;
- a crank case supporting the percussion mechanism within the housing;
- and
- an anti-vibration system for attenuating vibration in a direction of the first axis, the anti-vibration system comprising
- a counterweight supported by the percussion mechanism for relative movement therewith along a second axis that is parallel with the first axis, the counterweight reciprocating out of phase with the striker to attenuate vibration in the direction of the first axis, and
- a linkage coupling the percussion mechanism to the housing, the linkage permitting relative movement between the housing and the percussion mechanism along the first axis, the linkage including
- a first swing arm pivotally coupling the crank case to the housing, and
- a second swing arm pivotally coupling the crank case to the housing, the first and second swing arms each pivoting about a third axis, and
- a third swing arm pivotally coupling the crank case to the housing, the third swing arm pivoting about a fourth axis that is parallel to the third axis.
Dependencies are inferred from the claim text.