Self-advancing support for use in the pit of coal or metal mine
AssigneeTaiiheiyo Engineering Incorporated
InventorsMasao Hujimori, Shigeo Nakajima, Ken Takahashi, Tsunetoshi Ito, Toshio Shimada, Hajime Endo, Nobuo Kiyama
Life of this patent
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Abstract
A self-advancing support for use in the pit of coal or metal mine designed to support the pit roof after the mining operation by a shearer and having a mechanism for enabling the self-advancing support to be moved without using such means as a truck and a lift, said mechanism being housed within the self-advancing support and/or detached therefrom.
Claims4
A self-advancing support for use in the pit of a coal or metal mine comprising a table, at least one beam mounted on the table for supporting the pit roof, poles supporting the beam on the table, a shifter for enabling the support to be moved in the pit, a plurality of wheel assemblies, each of said wheel assemblies comprising an arm, means pivotally connecting one end of each of said arms to the table, a respective wheel rotatably mounted on the other end of each of said arms, hydraulic cylinder-piston rod assemblies connected to said arms for pivoting said arms thereby alternatively to pivot said arms sufficiently downwardly for the wheels to support the table whereby the support may be transported with the aid of the wheels and to pivot said arms sufficiently upwardly for the table to rest directly on the floor of the pit whereby the wheels are not caused to bear a load when the support is in operation at a pit face, and openings in the table for receiving said wheels when the table is resting directly on the floor of the pit.
Dependencies are inferred from the claim text.