Portable mine stopping device

Details Portable mine stopping device Portable mine stopping device

1975-02-24

1976-04-06

Shapiro, Jacob

49 34, 98 50, E21F 1700, E21F 114

Patent

active

039480577

ABSTRACT:
A ribbed sheet of flowable material is positionable on the sides and roof of an air passage of a mine for sealing irregularities in the sides and roof and extends across the air passage to prevent the flow of air therealong. A plurality of air cells are positioned in closely adjacent relation within the confines of the sheet and are inflatable to block the flow of air through the passage.

REFERENCES:
patent: 2729064 (1956-01-01), Kennedy et al.
patent: 3831318 (1974-08-01), Richmond

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