Patent ID: 6619527
Filing Date: 2003-09-16
Classification: B25C,B25F

Abstract:
A suspension mechanism for a motor of a combustion chamber fan in a combustion powered hand tool constructed and arranged for driving a driver blade to drive a fastener into a work piece, the tool having a cylinder head and generating an upward axial acceleration of the motor upon a combustion in the chamber, a subsequent reciprocal axial acceleration of the motor when a piston connected to the driver blade bottoms out on a bumper, at least one of the accelerations causing the motor to oscillate relative to the tool, said suspension mechanism comprising:suspending means configured for providing progressive dampening to the motor upon the generation of said axial accelerations; and said suspending means is configured for providing at least one stop defining an amount of axial travel of the motor relative to the cylinder head induced by said axial accelerations, and wherein said progressive dampening increases as the axial travel of the motor increases relative to the cylinder head and toward said at least one stop.