Adjustable cap unit

Details Adjustable cap unit Adjustable cap unit

1986-11-06

1988-07-05

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405291, E21D 1700

Patent

active

047550830

ABSTRACT:
An adustable cap unit for a mine support frame including a main cap, an adjustable cap connected to the main cap with a hinge-type connection, an adjusting cylinder mechanism extending within the widths of the main cap and the adjustable cap, and a guide for guiding a portion of the adjusting cylinder mechanism in a restrictive manner. The adjusting cylinder mechanism is provided either in the main cap or in the adjustable cap and an end portion of the adjusting cylinder mechanism is hinged to a bearing member provided at the bottom edges of the main cap or the adjustable cap adjacent the hinge-type connection. The adjustable cap unit can be used in extremely small seam thicknesses of as little as approximately 500 mm, while the contact pressure available at the front end of the adjustable cap is sufficient.

REFERENCES:
patent: 3732699 (1973-05-01), Stevenson
patent: 4447174 (1984-05-01), Becker et al.
"Schildausbautyp G320-12/27 furmittlere Floze", Brochure 6.81 of Firma Hermann Hemscheidt Maschinenfabrik GmbG & Co.

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