Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1987-01-30
1989-02-21
Burr, Edgar S.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
1724451, 172448, 1727011, E02F 380
Patent
active
048053228
ABSTRACT:
A blade assembly is adapted to be connected to the conventional three-point hitch of a farm tractor. A generally horizontal boom pivotally carries at its rear end a blade bucket which is swingable by means of a pair of double-action hydraulic jacks pivoted to the blade and to the boom. The front end of the boom is adapted to be pivotally connected to the pair of laterally-spaced hitch lever arms of the tractor hitch system. A spacer frame upstands from and is pivotally connected to the front ends of the boom. A central lever arm is pivotally connected intermediate its ends to the upper portion of the spacer frame. A central link pivotally interconnects the front end of said central lever arm with the front portion of the boom. A double-acting hydraulic jack interconnects the boom with the pivotal connection between the central lever arm and the link. The link, the boom, the spacer frame and the portion of the central lever arm which is rearward of the spacer frame form the sides of deformable quadrilateral structure which causes raising and lowering of the boom by extension and retraction of the last-named hydraulic jack respectively. The blade itself is characterized by a main panel bent to form three flat plate sections at an angle one with respect to the other. The blade can enter the ground and shovel back the earth with the minimum power reqirement.
REFERENCES:
patent: 2755573 (1956-07-01), Bannister
patent: 2792650 (1957-05-01), Kenyon
patent: 3043032 (1962-07-01), Discenza
patent: 3218740 (1963-06-01), White
patent: 3469330 (1969-09-01), Hood et al.
patent: 3523621 (1970-08-01), Anderson
patent: 4082150 (1978-04-01), Winkles
Lemire Antoine-Noel
Lemire Christian
Lemire Paul
Burr Edgar S.
Lisehora James A.
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