Electric powered rotary hacksaw
OwnerRobert L. McDonnellinventor
Life of this patent
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Abstract
An electric powered rotary hacksaw includes a cylindrical housing, an integral longitudinally extending mounting member and a rotary circular hacksaw blade disposed at one end of the mounting member. The hacksaw blade is fixed to a shaft for rotation about an axis which is generally perpendicular to the longitudinal axis of a mounting member. A variable speed electric motor is disposed in the housing and includes a shaft which extends forwardly in a direction parallel with the longitudinal member. A frustoconical driver member of an elastomeric material is fixed to the end of the shaft and engages the circular blade to displace a portion of the blade out of its normal plane of rotation by an angle of about 5 degrees and for rotating a circular blade.
Claims6
An electric powered rotary hacksaw comprising a housing and a longitudinally extending mounting member extending in a first direction from said housing, an annular rotary hacksaw blade having a generally planar surface and cutting teeth along a peripheral edge thereof, said cutting blade having a driving portion inwardly from said cutting teeth and rotatable in a first plane about a first axis of rotation which is perpendicular to said first plane, an electric motor disposed in said housing and including a rotatable shaft rotatable about a second axis of rotation which is generally transverse of said first axis of rotation, an elastomer frustoconical driver having disposed on said rotatable shaft and in contact with said driver portion of said cutting blade and said frustoconical driver displacing said driving portion and cutting teeth adjacent said driver from said first plane by an angle of about 5 degrees, wherein said frustoconical driver includes a peripheral surface and in which said peripheral surface defines an angle of between about 3 degrees to about 8 degrees with respect to its axis of rotation.
Dependencies are inferred from the claim text.