Loading gate for mine roof bolter apparatus

Details Loading gate for mine roof bolter apparatus Loading gate for mine roof bolter apparatus

1977-05-27

1978-06-13

Shapiro, Jacob

Land vehicles: bodies and tops

Bodies

Seats with body modifications

61 45B, 49199, 296 56, E21C 1102

Patent

active

040941582

ABSTRACT:
A loading gate for a mine roof bolter apparatus forms a protective canopy for mine working personnel when opened, and when closed, it seals an opening in the bolter containing manual controls and roof bolt storage cartridges. Access to the stored cartridges and controls by the personnel can only be made when the gate is open. The gate is operated by an over-center toggle joint driven by a hydraulic cylinder. As a fail-safe feature, once the gate has been fully opened, the over-center toggle joint maintains the gate open even upon failure of the hydraulic cylinder.

REFERENCES:
patent: 1859364 (1932-05-01), Haskell
patent: 3842610 (1974-10-01), Willis et al.
patent: 3869168 (1975-03-01), Matheson

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