Hydraulically actuated tool for mechanically splitting rock-like

Details Hydraulically actuated tool for mechanically splitting rock-like Hydraulically actuated tool for mechanically splitting rock-like

1978-04-04

1980-08-05

Leppink, James A.

Mining or in situ disintegration of hard material

Expansible breaking-down devices

Fluid-pressed element

299 23, E21C 3702

Patent

active

042159016

ABSTRACT:
A rock splitter tool is hydraulically actuated by a piston which moves a tapered wedge between feathers mounted at one end in a retaining means. The feathers and wedge, as an assembly, are inserted into a predrilled hole and the wedge is driven forward by the hydraulic piston to move the feathers outwardly to split the rock. The present invention is directed toward providing a hydraulically moved wedge in which the feathers and wear plate portions are retained by a clam shell clamp and retainer which are readily separated and removed to enable an inspection and/or replacement of any damaged apparatus. This clam shell clamp enables existing apparatus to be converted. Auxiliary apparatus utilizing a jack hammer device is also shown as is a hydraulic pulsation developing rotary valve which is adapted to cycle the wedge as it is moved forwardly.

REFERENCES:
patent: 1884946 (1932-10-01), Wineman
patent: 2776653 (1957-01-01), Eaton
patent: 2814475 (1957-11-01), Jay
patent: 2965145 (1960-12-01), Gutfreund
patent: 3488093 (1970-01-01), Darda
patent: 3558191 (1971-01-01), Fletcher et al.
patent: 3565488 (1971-02-01), Walsh
patent: 4072353 (1978-02-01), Clark et al.

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