Manually operable depth control for trenchers

Details Manually operable depth control for trenchers Manually operable depth control for trenchers

1976-04-20

1977-06-14

Eickholt, E. H.

Excavating

Peat excavators

37DIG19, 37 80R, 37191R, 33185V, E02F 506, B27G 2300

Patent

active

040288226

ABSTRACT:
The invention relates to a mechanism permitting the manual control of an trencher which is normally carried in trailing relationship to a vehicle and is pivotally mounted to the vehicle. The effective cutting depth of this type trencher is determined by the angle of the frame carrying the endless chain relative to the horizontal. An upstanding sighting bar is pivotally mounted to the frame of the trencher and means are provided for maintaining the sighting bar in a true vertical position irrespective of the angle of the frame relative to the horizontal. Additionally, the effective vertical height of the sighting bar is varied as a trigonometric function of the angle of the digging frame relative to the horizontal.

REFERENCES:
patent: 289734 (1883-12-01), Welch
patent: 1131114 (1915-03-01), Bunnell
patent: 1237260 (1917-08-01), Bentson
patent: 1300371 (1919-04-01), French
patent: 1395810 (1921-11-01), George
patent: 1661812 (1928-03-01), Smith
patent: 2464003 (1949-03-01), Stadler
patent: 2508087 (1950-05-01), Bailey
patent: 2580954 (1952-01-01), Przybylski
patent: 3044194 (1962-07-01), Balkheimer
patent: 3462845 (1969-08-01), Matthews

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