Ball-and-socket type connections for use with mining apparatus

Details Ball-and-socket type connections for use with mining apparatus Ball-and-socket type connections for use with mining apparatus

1975-03-05

1977-01-25

Frazier, Roy D.

Supports

Props and braces

Heads and bases

403123, E21D 1555

Patent

active

040047717

ABSTRACT:
A ball-and-socket type connection particularly intended for interconnecting a prop and a roof bar or floor rail of a mine roof support assembly. The connection has a socket formed on the bar or rail and a ball part formed on the prop. The socket part has a curvilinear inner wall portion which receives the ball part and a rectilinear frusto-conical outer wall portion which widens outwardly of the socket part to form a mouth. The ball part has a bore or recesses which receives a securing means which may be a onepiece or multi-part elongate structure. The securing means extends into the socket part to engage with the bore or recesses in the socket part and lies alongside the outer wall portion of the socket part. The securing means is detachably connected to the bar or rail in a position readily accessible from the side adjoining the mouth of the socket part when the connection is in use.

REFERENCES:
patent: 3425656 (1969-02-01), Bore
patent: 3722846 (1973-03-01), Albrecht
patent: 3782673 (1974-01-01), Wehrens

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