| 摘要 |
An elevating catwalk apparatus for use at a well bore drilling site, or the like, for effectively elevating the "ground level" with respect to the drilling floor of the well drilling apparatus and comprising a base framework structure having a catwalk secured thereto by a plurality of spaced support posts and movable between elevated and lowered positions with respect thereto, the opposite ends of the support posts being pivotally secured between the catwalk and the base framework, angularly disposed brace members having one end pivotally secured to at least one of the support posts and the opposite end pivotally and slidably secured to the base structure for strengthening the support of the catwalk in the elevated position thereof, the catwalk being responsive to longitudinal pressure in one direction for moving upwardly with respect to the base framework and pressure in an opposite direction for moving downwardly with respect to the base framework.
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