Blade holder in oscillated head for floor stripping machine

Claim 1

For use in power-operated floor stripping apparatus that includes a frame, a drive carried on the frame, wheels supporting the frame, a handle to guide the frame, and a cutting blade carried by a head which is pivotally mounted to the frame, the improvement comprising (a) a connecting element, having a first tubular part and a second tubular part, said parts having spaced, parallel axes, said second tubular part pivotally connected to the head, (b) a drive shaft extending within said first tubular part, said shaft operatively connectible to the drive to be rotated thereby, (c) said drive shaft carrying two axially spaced eccentrics to be rotated by the shaft, there being a lubricant receiving space located directly between said eccentrics, (d) two annular bearings respectively carried by and within said first tubular part, said bearings respectively receiving said spaced eccentrics to oscillate said first tubular part, said head and said blade as said eccentrics are rotated by the shaft, (e) said head consisting of lightweight metal and having two flanges interconnected by a web, the flanges being locally thickened to substantial extent to define two lugs forming bearing openings for a pivot shaft connected to the frame, (f) and a blade holder plate attached to the head at the bottom side thereof, two shafts extending parallel to said head web and through said head flanges to provide shaft projections exteriorly of said flanges, and fasteners extending through said holder plate and having threaded shanks in threaded engagement with threaded openings in said shaft projections, the fasteners having heads below said holder plate to be rotated for clamping the blade between the plate and the head bottom side.