System using a toothed wheel for fragmenting a frangible...

Details System using a toothed wheel for fragmenting a frangible... System using a toothed wheel for fragmenting a frangible...

E - Fixed Constructions

01

H

94/55

E01H 5/12 (2006.01) B28D 1/18 (2006.01) E01C 23/12 (2006.01)

Patent

CA 2013540

A layer of material such as pavement or sheet ice coating the surface of a roadway is efficiently removed using apparatus that includes a longitudinal tube in a breaker assembly which is rotatably carried by a control frame beam that depends from an articulate hydraulic lift and tilt mechanism of a road grader. Coaxially attached to the tube and uniformly distributed along its length, a number of retainer rings each carry several radially extended teeth that function to fragment the layer. Each tooth includes a tip portion with a free end that penetrates and punctures the layer and a trailing divergent portion which enters the puncture and translates a linear force applied thereto into a radial outward force that fractures and fragments the side walls of each puncture when the breaker assembly is lowered onto the layer and a downward force is applied to each tooth as the breaker assembly rolls over the layer surface.

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