Patent ID: 8695862
Filing Date: 2014-04-15
Classification: B25C,B25F

Abstract:
1. An oscillation reducing suspension device for a fan motor of a combustion-powered tool, the combustion-powered tool including a cylinder head which is disposed to cover a combustion chamber, and which has an upper major surface defining a cavity that extends along a rotary axis for accommodating the fan motor and that terminates at a floor surface that has a passage to communicate the cavity with the combustion chamber so as to permit an armature shaft of the fan motor to extend into the combustion chamber, and a fan which is received in the combustion chamber, and which is rotated with the armature shaft, said oscillation reducing suspension device comprising: at least one axial-play setting unit which is adapted to be mounted on the upper major surface, and which is configured to have upper and lower limit defining members that are spaced apart from each other by an axial play route extending parallel to the rotary axis, and that are made from a rigid material; a suspending mount configured to keep a barrel wall of the fan motor oriented in the rotary axis, and including at least one lug which is disposed to correspond to said axial-play setting unit, and which extends radially relative to the rotary axis and into said axial play route such that said axial play route is divided into i) a proximate region between the upper major surface of the cylinder head and the at least one lug and ii) a distal region between the at least one lug and the at least one upper limit defining member of the at least one axial-play setting unit; and at least one damper unit including upper and lower damping members which are respectively disposed in said distal and proximate regions.