Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent
1976-06-10
1977-05-10
Taylor, Dennis L.
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
61 45R, 173 23, 175219, 182112, E21D 1900
Patent
active
040220265
ABSTRACT:
A safety shield attachment for protecting machine operators from debris or cave-ins from above has a canopy which is pivotally supported at one end, but normally retained in a fixed position over an operator's station, and a platform pivotally supported at one end, the other end of which can be suspended from the canopy at a fixed level therebelow or allowed to rest upon the ground in a "free-floating" condition.
REFERENCES:
patent: 3737006 (1973-06-01), Long
patent: 3784159 (1974-01-01), Skattman et al.
patent: 3865197 (1975-02-01), McCormick
patent: 3937517 (1976-02-01), Donovan et al.
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