Mining or in situ disintegration of hard material – Expansible breaking-down devices – Wedge
Patent
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.
Akanuma Shigetake
Imamura Haruo
Kakuta Hiroshi
Matsumoto Masato
Nakajima Minoru
Kabushiki Kaisha Komatsu Seisakusho
Leppink James A.
Odar Thomas J.
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