Elongate compression bearing member

Details Elongate compression bearing member Elongate compression bearing member

1980-11-03

1985-06-04

Foss, J. Franklin

Supports

Props and braces

248357, 405288, E04G 2500

Patent

active

045209804

ABSTRACT:
A prop intended particularly for use in underground mines, is made of timber. At one or both ends of the prop, a reduced diameter portion is formed. The rest of the prop has a larger diameter. At the end or ends of the larger diameter portion adjacent the reduced diameter portion(s), a restraining ring surrounds the prop.

REFERENCES:
patent: 1471124 (1923-10-01), Handl
patent: 1642603 (1927-09-01), Conway
patent: 1759786 (1930-05-01), Hardin
patent: 1996401 (1935-04-01), Bowen
patent: 2701449 (1955-02-01), Young
patent: 3372552 (1968-03-01), Liddell
patent: 4283449 (1981-08-01), Damminger

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