Bartell Industries Inc.

Frank Zelenka

In apparatus for removing material from the surface of a solid substrate, a rotary cutter cage has a plurality of cutters where each cutter has a plurality of projecting cutter teeth. The improvement comprises an adaptation in mounting of the cutters on the cutter rotary cage to force a lateral movement in the cutters when they impact a solid substrate being treated during rotation of the rotary cutter cage.

Inclined cutter for surface cleaning head

Apparatus is disclosed for removing material from the surface of a solid substrate. A rotary cutter cage is mounted on a support frame and has at least one row of a plurality of cutters mounted on a bar connected to the cutter cage. The cutters impact a solid substrate during rotation of the cutter cage. Each cutter has a bore through which the bar extends in mounting the plurality of cutters on the cutter cage. The bore is larger than the bar to permit rotation of each cutter on the bar at least during contact with the surface being treated. A brake is provided on the cutter cage to brake rotation of the cutters after each occurrence of a corresponding row of cutters contacting the surface being treated during rotation of the cutter cage.

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Rexdale, Canada

Frank Zelenka