Earth scraper assembly

Details Earth scraper assembly Earth scraper assembly

1980-05-19

1982-06-29

Eickholt, E. H.

Excavating

Snow or ice removing or grooming by portable device

Railway clearer

180208, 172444, 414481, 414572, E02F 362

Patent

active

043366635

ABSTRACT:
A hoisting mechanism for earth scraping equipment adapted for towing behind a vehicle, such mechanism including a plurality of pivotally connected links designed to pivot the scraper bed about rear wheels in a manner that provides for change in elevation of the scraper without affecting the elevation of the towing tongue at the point of towing connection. The hoisting mechanism is readily adaptable to include a pressurized accumulator selectively activated by scraper level by means of a cam operated valve to absorb shock while being towed in an elevated position. Further, the hydraulics utilized to move the rear wall forward for ejecting collected earth are the same hydraulics utilized to draw the rear wheels into the scraper bed for making the scraper narrower and therefore suitable for highway travel.

REFERENCES:
patent: 2956353 (1960-10-01), Hanner et al.
patent: 3311389 (1967-03-01), Barton et al.
patent: 3314494 (1967-04-01), Weitzner
patent: 3418735 (1968-12-01), Martin
patent: 3449845 (1969-06-01), Jessen et al.
patent: 3710965 (1973-01-01), Joosten
patent: 3969835 (1976-07-01), Erdelyan

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