Mast assembly

Details Mast assembly Mast assembly

1976-02-25

1977-05-10

Purser, Ernest R.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

403 13, 403161, E04H 1218, E04H 1210

Patent

active

040219780

ABSTRACT:
There is disclosed herein a telescoping mast assembly adapted for use with drill rigs and the like. The mast assembly comprises multiple sections, said sections being adapted for nesting one within the other in the telescoped-to-the-closed condition and each section comprising mutually convergent corner leg members which, when said mast assembly is extended, form concentric and in-line arrangements of the corner leg members from the base to the crown of the mast. Means are provided for connecting each mast section to its neighboring mast section upon extension thereof. In addition, means are also provided for indexing of the connector means upon extension of the mast assembly from its telescoped-to-the-closed condition.

REFERENCES:
patent: 2804948 (1957-09-01), Woolslayer et al.
patent: 2804949 (1957-09-01), Woolslayer et al.
patent: 2808911 (1957-10-01), McLerran
patent: 2923381 (1960-02-01), Wilkinson et al.

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