Digging and propulsion unit for a trenching apparatus

Details Digging and propulsion unit for a trenching apparatus Digging and propulsion unit for a trenching apparatus

1992-08-17

1993-07-20

Taylor, Dennis L.

Excavating

Ditcher

Having endless digger

37353, 37347, 37464, E02F 506

Patent

active

052282228

ABSTRACT:
A trenching apparatus having a digger arm operative to form a trench along a trench line includes a lower end which mounts a digging and propulsion unit having an upper and lower group of sprockets which are vertically spaced from one another and carry chains having digger teeth mounted thereto. Structure is provided to increase the relative spacing between the upper and lower sprockets, while the chains remain in engagement therewith to increase tension in the chains as they wear and a number of scraper blades are mounted in position relative to the sprockets and the shafts which carry them to prevent the buildup of soil, concrete, rocks or other foreign material thereon and thus ensure smooth operation of the digging and propulsion unit.

REFERENCES:
patent: 3209472 (1965-10-01), Nickolaev et al.
patent: 3951459 (1976-04-01), Honeycutt, Jr.
patent: 4277898 (1981-07-01), Flippin
patent: 4716665 (1988-01-01), Johnson et al.
patent: 4861199 (1989-08-01), Hackmack
patent: 4871281 (1989-10-01), Justice
patent: 4893464 (1990-01-01), Thuerman
patent: 5113609 (1992-05-01), Camilleri

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