Shield-type support frame

Details Shield-type support frame Shield-type support frame

1983-11-29

1985-12-10

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405297, E21D 1544

Patent

active

045576351

ABSTRACT:
A shield-type support frame for serving as a face support in underground mining operations having a bottom structure, a one-piece roof cap, at least one hydraulic plunger connecting the bottom structure and the roof cap and two shield elements arranged side by side, which can be adjusted in height separately and which are each pivotally connected to the bottom structure and the roof cap. Joint connections between each shield element and the roof cap permit tilting of the roof cap relative to the shield elements about axes extending in the forward direction. In such a shield-type support frame, the roof cap is guided better in the forward direction and tilting of the roof cap about a vertical axis is prevented by the joint connections between the shield elements and the roof cap each having a hinge connection with two hinge pins of which the one extends in the face length direction and the other in the forward direction, where the roof cap is supported by the hinge pins extending in the forward direction and the shield elements by the hinge pins extending in the face length direction.

REFERENCES:
patent: 4118939 (1978-10-01), Saunders
patent: 4132081 (1979-01-01), Walker et al.
patent: 4191497 (1980-03-01), Poklekowski et al.
patent: 4293247 (1981-10-01), Rosenberg et al.

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