Telescopic support caps, e.g. for use in mining

Details Telescopic support caps, e.g. for use in mining Telescopic support caps, e.g. for use in mining

1976-02-13

1976-11-16

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1514

Patent

active

039915778

ABSTRACT:
This invention concerns a telescopic support cap, e.g. for mining, comprising a main beam element having a support end and an extensible end; a bar slidable relative to, and having one end slidingly connected to, the main element, the other, free end projecting beyond said extensible end; a crank connected at one end by a transverse pivot fixed on the main element at a short distance from the said support end, the other, free end of the crank being shaped for bearing on a timber prop, without other connection; and a hydraulic jack pivoted to the bar and to the crank intermediate the pivotal axis of the latter and its free end, such that the cap is buttressed on actuating the jack by the said free end and by the main element and the crank.

REFERENCES:
patent: 1821020 (1931-09-01), Mensforth
patent: 2036490 (1936-04-01), Neilson et al.
patent: 2371789 (1945-03-01), Batten
patent: 2532168 (1950-11-01), Jakoubek
patent: 3312071 (1967-04-01), Dommann

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