Bottom brace for crane

Details Bottom brace for crane Bottom brace for crane

1975-09-26

1978-07-25

Braun, Leslie

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

173 43, 2541391, E21C 1100

Patent

active

041020944

ABSTRACT:
There is disclosed herein a portable crane having a boom and lower brace supporting an elongated lead adapted to carry a pile driver, drill or other tool. The outer end of the brace has a capstan drive connected to a lead supporting line whereby the brace is movable vertically independently of the lead.

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patent: 3511320 (1970-05-01), Miller
patent: 3550693 (1970-12-01), Bermingham
patent: 3588050 (1971-06-01), Black et al.
patent: 3708024 (1973-01-01), Back
patent: 3768575 (1973-10-01), MacKinnon et al.
patent: 3803780 (1974-04-01), Donnelly
patent: 3827508 (1974-08-01), MacKinnon
patent: 3888317 (1975-06-01), Walters

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