Pivoted scraper ejector with hydraulic means to provide level spread
AssigneeCaterpillar Tractor Co.
InventorErnest W. Wagner
Life of this patent
Estimating the term…
Abstract
In earth-moving equipment wherein material is ejected from the bottom of a bowl through an open pivoted ejector floor and leveled by the front edge of the floor, the improvement wherein the bowl is automatically raised and lowered as the distance of the front edge of the floor below the bottom of the bowl increases and decreases, respectively, so that level spreading may be achieved.
Claims6
In an earth-moving scraper having a scraper bowl with ground-engaging wheels at one end thereof and hydraulically operated bowl lift cylinders at the other end for raising and lowering said other end of said bowl and a floor ejector mounted on said bowl for pivotal movement about an axis transverse to said bowl, the improvement comprising:
- signal-producing means operatively associated with said ejector floor for producing a signal during at least a portion of the pivotal movement of said ejector floor about its horizontal axis, said signal having a magnitude proportional to the magnitude of vertical distance of the forward edge of said ejector floor below the bottom of said scraper bowl;
- signal-sensing means for sensing the magnitude of said signal;
- and
- means operatively associated with said bowl lift cylinders and actuated by said signal-sensing means for operating said bowl lift cylinders to raise or lower said other end of said scraper bowl in response to, and in an amount proportional to, an increase or decrease respectively in the magnitude of said signal.
Dependencies are inferred from the claim text.