US 12,472,613 B2
Percussion tool
Matthew S. Zawisza, Pewaukee, WI (US); Andrew D. Van Hoorn, Menomonee Falls, WI (US); and Ethan T. Zimany, Kenosha, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Nov. 14, 2023, as Appl. No. 18/508,298.
Application 17/307,019 is a division of application No. 16/257,600, filed on Jan. 25, 2019, granted, now 11,059,155, issued on Jul. 13, 2021.
Application 18/508,298 is a continuation of application No. 17/307,019, filed on May 4, 2021, granted, now 11,865,687.
Claims priority of provisional application 62/650,737, filed on Mar. 30, 2018.
Claims priority of provisional application 62/622,615, filed on Jan. 26, 2018.
Prior Publication US 2024/0083003 A1, Mar. 14, 2024
Int. Cl. B25D 11/06 (2006.01); B25D 11/00 (2006.01); B25D 11/12 (2006.01); B25D 17/04 (2006.01); B25D 17/06 (2006.01); B25D 17/24 (2006.01); B25D 17/26 (2006.01); B25F 5/00 (2006.01); B25F 5/02 (2006.01); H01M 50/247 (2021.01); H02K 7/14 (2006.01); H02P 29/00 (2016.01)
CPC B25D 11/064 (2013.01) [B25D 11/005 (2013.01); B25D 11/125 (2013.01); B25D 17/04 (2013.01); B25D 17/06 (2013.01); B25D 17/24 (2013.01); B25D 17/26 (2013.01); B25F 5/00 (2013.01); B25F 5/02 (2013.01); H01M 50/247 (2021.01); H02K 7/145 (2013.01); H02P 29/00 (2013.01); B25D 2250/095 (2013.01); B25D 2250/121 (2013.01); B25D 2250/175 (2013.01); B25D 2250/201 (2013.01); B25D 2250/221 (2013.01); B25D 2250/391 (2013.01); H01M 2220/30 (2013.01)] 16 Claims
OG exemplary drawing
 
1. 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.