Door for a mine stopping

Details Door for a mine stopping Door for a mine stopping

1976-11-04

1978-04-04

Moore, Richard E.

Closure fasteners

Bolts

Swinging

292128, E05C 500

Patent

active

040823318

ABSTRACT:
A door for a doorway in a mine stopping having latch means adapted to yield to maintain the door latched on heaving of the sill of the doorway.

REFERENCES:
patent: 970661 (1910-09-01), Stoddard
patent: 1128502 (1915-02-01), Pinnow
patent: 1451662 (1923-04-01), Forbes
patent: 2020188 (1935-11-01), Johnson
patent: 2272825 (1942-02-01), Anderson

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