Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1977-10-04
1979-01-16
Eickholt, E. H.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
214133, E02F 346
Patent
active
041342216
ABSTRACT:
An earth grading machine has a powered reciprocable earth moving element guided by a vertically inclinable track member. Means for adjusting the vertical inclination of the track member includes support means accommodating pivotal movement of the track member in a vertical plane about both a first axis adjacent one end of the track member and about a second axis spaced longitudinally of the track member from said first axis.Adjustable means effects raising and lowering of the second axis.Adjustable length means interconnects the track member and its support means in laterally offset relation to the first axis, and comprises a hydraulic cylinder pivotally connected to the support means, and a piston movable in response to hydraulic pressure within the cylinder, said piston being pivotally connected to the track member.
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patent: 1244290 (1917-10-01), Cardwell
patent: 1316058 (1919-09-01), Pugh
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patent: 3166205 (1965-01-01), Symmank
patent: 3465904 (1969-09-01), Pensa
patent: 3992791 (1976-11-01), Dean
Eickholt E. H.
Scofan Contractors Limited
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