Automatic depth control for endless chain type trencher

Details Automatic depth control for endless chain type trencher Automatic depth control for endless chain type trencher

1975-11-03

1977-07-12

Burr, Edgar S.

Excavating

Peat excavators

33264, 33DIG21, 37DIG1, 37DIG19, 37DIG20, 73432L, 356172, E02F 506, E02F 920, E02F 926, G05G 1504

Patent

active

040344908

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 is controlled by one or more hydraulic cylinders which, in turn, are controlled by signals derived from sensors carried by an upstanding vertical mast mounted to the frame which detects a reference plane defined by a rotating laser beam. A trigonometric correction factor to compensate for the mast mounting is included.

REFERENCES:
patent: 1300371 (1919-04-01), French
patent: 2580954 (1952-01-01), Przybylski
patent: 2919505 (1960-01-01), Bethany
patent: 3044194 (1962-07-01), Balkheimer
patent: 3058242 (1962-10-01), Ocnaschek
patent: 3557372 (1971-01-01), Ede
patent: 3727332 (1973-04-01), Zimmer
patent: 3750299 (1973-08-01), Plasser et al.
patent: 3778168 (1973-12-01), Willner
patent: 3813171 (1974-05-01), Teach et al.
patent: 3887012 (1975-06-01), Scholl et al.

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