Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1976-04-20
1977-08-02
Crowder, Clifford D.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
37108R, 37115, 198520, 299 34, E02F 500
Patent
active
040387640
ABSTRACT:
A shearing excavator including a unique blade assembly for removing earth in successive layers from a substantially upright face. The successive earth layers are removed by pulling a blade assembly along the full length of the face. The blade assembly is connected to a longitudinal framework that provides support for an earth receiving and transporting conveyor. This conveyor receives material deflected from the blade assembly and directs it to a discharge end adjacent one end of the excavator framework. A lateral conveyor receives the discharged material and moves it to a remote location for further processing. The blade assembly includes an upright first blade with a substantially upright cutting edge. The bottom end of the upright cutting edge is located at a point above the lower edge of the face, leaving a portion thereof to be removed by a second blade. The second blade is horizontally inclined and includes a substantially horizontal forward cutting edge that is located rearward of the first upright cutting edge (with respect to a forward direction travel of the blade assembly). The second blade is inclined upwardly from its cutting edge which is located at the loweredge of the face. The second blade cuts through the earth along the face that remains below the bottom edge of the upright blade.
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patent: 2689717 (1954-09-01), Bainbridge
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patent: 3310893 (1967-03-01), Perry et al.
patent: 3530599 (1970-09-01), Holland
patent: 3922802 (1975-12-01), James
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