Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1987-01-13
1989-08-29
Burr, Edgar S.
Hydraulic and earth engineering
Earth treatment or control
Chemical
37 86, 37191A, 405270, E02F 506, E02F 314
Patent
active
048611999
ABSTRACT:
A slit trencher can be mounted on a carrier machine which moves in a driving direction. The trencher includes a holder adapted to be mounted on the carrier machine. Also included is a boom mounted on this holder. The trencher has a circulating chain and a plurality of slit formers mounted on the circulating chain. The circulating chain mounted on the boom circulates thereon. This circulating chain is operable to perform work when circulating along a running direction. Each of the slit formers has a cutting edge slanted both with respect to the running direction of the chain and with respect to the driving direction of the carrier machine. These slit formers have a rear side and each includes a cover plate and a rear plate. The cover plate has a horizontal width sized to cover the width of the slit. This cover plate is slanted towards a direction opposite to the running direction of the circulator. The rear plate is mounted adjacent to the cover plate to block the rear side.
REFERENCES:
patent: 2335166 (1943-11-01), Wilson
patent: 3603010 (1971-09-01), Polinek
patent: 3646767 (1972-03-01), Shelley
patent: 3659364 (1972-05-01), Wilson
patent: 3676941 (1972-07-01), Cohrs et al.
patent: 3831299 (1974-08-01), Kelley
Adams Thomas L.
Burr Edgar S.
Cohen Moshe L.
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