Apparatus for mechanically breaking up rock

Details Apparatus for mechanically breaking up rock Apparatus for mechanically breaking up rock

1984-05-10

1986-01-28

Leppink, James A.

Mining or in situ disintegration of hard material

Expansible breaking-down devices

Wedge

299 22, E21C 3706, E21C 3702

Patent

active

045667365

ABSTRACT:
Dust-proof membranes are provided across both ends of opposite respective divided surfaces defined by halves of wedge guide members. Each membrane has projections formed as an integral unit along the longitudinal side edges thereof. The projections are thrust into longitudinally extending C-shape cross-section grooves formed along the divided surfaces of the wedge guide members. The groove side surfaces are perpendicular to the bottom surface thereof.

REFERENCES:
patent: 3628337 (1971-12-01), Stepanich et al.
patent: 4252375 (1981-02-01), Langfield et al.
patent: 4474410 (1984-10-01), Ogaki et al.

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