Depth control for endless chain type trencher

Details Depth control for endless chain type trencher Depth control for endless chain type trencher

1976-05-12

1977-09-27

Crowder, Clifford D.

Excavating

Peat excavators

37DIG1, 37DIG19, E02F 506

Patent

active

040501710

ABSTRACT:
The cutting depth of an endless chain type trencher is normally determined by the angle of the frame carrying the endless chain relative to the horizontal. In accordance with this invention, the angular position of the digging frame, hence the depth of the trench is controlled by the angular relationship of a trailing shoe carried by the digging frame relative to the digging frame. The trailing shoe has an elongated horizontal bottom surface that normally rides along the bottom of the formed trench. An upstanding mast is secured to the shoe at a point forwardly of the bottom surface and means on the top of the mast are utilized to indicate and control the depth of the trench.

REFERENCES:
patent: 915963 (1909-03-01), Hovland
patent: 1194460 (1916-08-01), Yocum
patent: 1239474 (1917-09-01), French
patent: 1661812 (1928-03-01), Smith
patent: 2580954 (1952-01-01), Przybylski
patent: 3044194 (1962-07-01), Balkheimer
patent: 3376574 (1968-04-01), Gosling
patent: 3708232 (1973-01-01), Walsh
patent: 3813171 (1974-05-01), Teach et al.
patent: 3887012 (1975-06-01), Scholl et al.
Studebaker, "The Laserplane System," Agricultural Engineering, Aug., 1971; pp. 418-419.

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