Fluid actuated apparatus for mechanically splitting rock-like ma

Details Fluid actuated apparatus for mechanically splitting rock-like ma Fluid actuated apparatus for mechanically splitting rock-like ma

1987-09-21

1988-12-13

Massie, IV, Jerome W.

Mining or in situ disintegration of hard material

Expansible breaking-down devices

Fluid-pressed element

299 23, E21C 3704

Patent

active

047906022

ABSTRACT:
Apparatus to break rock and concrete slabs in situ when inserted into a predrilled hole in the rock and concrete slabs comprises first and second members each having an outer surface parallel to each other and the wall of the predrilled hole; a third member having a driven end, a free end, a first surface parallel to the outer surface of the first and second members slidably engaging a bottom surface of a longitudinal groove in the first member coextensive therewith and second surface opposite the first surface having a first predetermined slope along a given length of the third member from a point adjacent to the drive end to the free end, the third member having a single inward stroke of a predetermined length during each cycle of operation; and a first arrangement disposed between the second surface of the third member and an inner surface of the second member, the first arrangement when rendered operative causing the outer surface of the first and second members to engage the wall of the predetermined hole and responding to the inward stroke of the third member to apply a powerful breaking force directly to the second member resulting in lateral movement thereof and to apply a reaction force equal to the breaking force to the first member to break the rock and concrete slab surrounding the predrilled hole.

REFERENCES:
patent: 1008818 (1911-11-01), Harris
patent: 1034860 (1912-08-01), Ballou
patent: 3791698 (1974-02-01), Darda
patent: 3894772 (1975-07-01), Darda

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