Stone working – Splitting – shearing – and punching
Patent
1979-01-08
1980-05-20
Whitehead, Harold D.
Stone working
Splitting, shearing, and punching
B28D 132
Patent
active
042034140
ABSTRACT:
Irregular surfaced slabs of stone are split into blocks of selected width by an apparatus having an upright frame mounted upon a base and with spaced vertical columns connected to opposed upper and lower vertically reciprocal carriages carrying rows of individual power rams each connected to chisels for selected vertical reciprocation relative to the carriage and into engagement with a stone surface. The chisel rams lock into engagement and carriage rams within the columns and on the base move the upper and lower carriages toward each other to split the stone therebetween. Separate hydraulic power units for each carriage and the chisels carried thereon are connected via electrical circuits to a central unit for regulating operation of the apparatus. An upper hydraulic power fluid unit is mounted to the upper carriage for movement therewith and includes a motor driving power fluid pumps and having a reservoir integral with the upper carriage. Centering rams extend inwardly from each column and are operable in combination with a gauging bar assembly mounted on the upper carriage to selectively position the stone for cutting. In-feed and discharge conveyors are respectively positioned for travel of the stone slabs thereon and turntable, walker beam arrangements, and discharge flippers assist handling the stone slabs.
REFERENCES:
patent: 2514352 (1950-07-01), Solomito
patent: 2552958 (1951-05-01), Graham
patent: 2753861 (1956-07-01), Bode
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patent: 3559631 (1971-02-01), Mangis
patent: 3677258 (1972-07-01), Fletcher
patent: 3809049 (1974-05-01), Fletcher
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