Rotary mower holder with expendable blades

Claim 1

A blade and holder assembly for a power driven rotary mower having a motor with an axially vertical drive shaft, comprising a bar having a central hole for attachment to the shaft of a motor so as to rotate in a horizontal plane about the axis of said shaft; a flange at each end of the bar bent to define a space with a continuous adjacent end portion of the bar; a pair of blades, each blade being a solid body, generally trapozoidally shaped in cross section and only having a cutting edge and a back, said back fitting into said space between one flange and one end portion of the bar and means for removably retaining the blades at opposite ends of the bar, said flange and end portion of the bar being spaced apart; a spacer disposed between the flange and end portion of the bar and serving as an abutment for the back of the blade; said flange and end portion of the bar being further formed with aligned holes; screws extending through holes in said spacer and engaged in said aligned holes in the flange and end portion of the bar; and the retaining means including opposingly spaced bent edges of said flange and end portion of the bar, said opposing edges defining opposing channels, said back of the blade being grooved to fit slidably into said channels with the blade extending forwardly from between said edges.