Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1984-09-25
1987-01-06
Burr, Edgar S.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
403107, 414722, 414726, E02F 300
Patent
active
046336010
ABSTRACT:
An excavating shovel having pivotally interconnected back and front sections and wherein the front section has a torque tube supported by bushing means on the back section and wherein the torque tube is equipped with radially extending moment arm means for pivotal actuation of the front section toward and away from the back section.
REFERENCES:
patent: 3854608 (1974-12-01), Arnold
patent: 3915501 (1975-10-01), Cobb et al.
patent: 4283866 (1981-08-01), Ogawa
patent: 4317393 (1982-03-01), Graffam
patent: 4322062 (1982-03-01), Aleck
patent: 4375345 (1983-03-01), Hanson
patent: 4566844 (1986-01-01), Campih
Fleck Robert S.
Kreitzberg John S.
Burr Edgar S.
Cohen Moshe I.
ESCO Corporation
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