A rotary power tool of the type having a cavity in which is housed a motor containing a rotary shaft is improved by the use of vibration-damping material interposed between the interior of the cavity and the exterior of the motor housing. In one instance of a tool in which the motor is of the air-driven type, the motor housing and casing are ported and the vibration-damping material is configured to enable communication among the ports. In one form of design, the vibration-damping material comprises a sleeve fitting the casing cavity but annularly spacedly surrounding the motor housing but that housing includes axially spaced apart rings of vibration-damping material that tightly encircle the housing and also tightly fit within the sleeve.
申请公布号
US4905772(A)
申请公布日期
1990.03.06
申请号
US19880239478
申请日期
1988.09.01
申请人
HONSA, THOMAS W.;LAFRENZ, CLIFFORD J.;HONSA, THOMAS S.;STUTENBERG, DELBERT M.
发明人
HONSA, THOMAS W.;LAFRENZ, CLIFFORD J.;HONSA, THOMAS S.;STUTENBERG, DELBERT M.