Patent ID: 7328514
Filing Date: 2008-02-12
Classification: B23D,Y10T

Abstract:
1. A reciprocating power tool, said tool connectable to a power supply which, when activated, provides power to a motor which imparts drive to a blade holder assembly and in turn, causes movement of a blade connected to the blade holder assembly to perform a cutting operation on a workpiece; said blade holder assembly including a holder member within the housing of the tool; said holder member mounted with respect to at least two, spaced bearings, a first bearing mounted with respect to the holder member towards one end thereof at or adjacent to a pivotal location for imparting a swinging or pendulum movement on the holder member and a second bearing, spaced from the first bearing, which allows movement in a controlled manner of the holder member in a linear reciprocating direction substantially in line with the longitudinal axis of the holder member and in a pendulum manner; movement of the holder member in the linear direction with respect to the said second bearing is through an aperture provided in the first part of the said second bearing and movement in the pendulum manner is by movement of the holder member in conjunction with the first part, with respect to a second part of the second bearing; characterised in that the second part of the second bearing has a slot or aperture formed therein, with a width along a first axis which is substantially similar to a width of the first part of said second bearing along said first axis and a length along a second axis, perpendicular to the first axis that is greater than a length of the first part of said second bearing along said second axis so as to allow relative movement of the first part along the said slot or aperture along said second axis, said first or second parts of the second bearing provided with location means to allow guided movement of the first part with respect to the second part and sufficient tolerance is provided in the location means to allow the sliding movement of the first part along the second part to include an arcuate component.