Mine roof supports

Details Mine roof supports Mine roof supports

1976-05-21

1977-06-21

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

040303080

ABSTRACT:
A mine roof support comprises at least one pair of hydraulically extensible chock legs connected at upper ends in articulated manner between one or more roof beams of the support and connected at lower end in articulated manner to one or more base members of the support, a rigid yoke located at a position spaced from the base member(s) between and connecting either the pair of chock legs, the yoke containing between the chock legs a projecting pin secured in a bearing attached to the yoke, or one of the pairs of chock legs, the yoke containing two projecting pins each pin being secured in a bearing attached to the yoke, and the or each pin having a lateral base contained at one side between abutment surfaces secured to the base member(s) and at the other to one end of a load applying means, the other end of the load applying means being supported from the base member(s).

REFERENCES:
patent: 3269686 (1966-08-01), Allen
patent: 3309054 (1967-03-01), Davis-Ratcliffe
patent: 3531162 (1970-09-01), Ashurst
patent: 3646768 (1972-03-01), Whitaker
patent: 3832856 (1974-09-01), Sigott et al.

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