Traversing hoists – With haul-in line
Patent
1984-06-25
1985-12-24
Blix, Trygve M.
Traversing hoists
With haul-in line
212223, 212249, 212252, B66C 1318, B66C 2302
Patent
active
045600740
ABSTRACT:
There is disclosed a hoist adapted to be mounted on a conventional sectional scaffold structure in which the hoist apparatus consists of a boom assembly to be mounted near the top of a scaffold structure and a winch assembly to be mounted near the bottom of such structure. The winch assembly includes a cable drum and a cable, a worm gear drive for the drum and a two-speed pulley drive from the motor to the worm gear. The cable runs upwardly in proximity to a column of the scaffold structure and through a short hollow vertical mast section on top of which is mounted a rotatable boom having a pair of pulleys to guide the cable out of the top of the mast section to the end of the boom and downwardly to receive a load. The mast section supporting the boom may be only about six feet long and is removably attached to a column of the scaffold structure so that the scaffold structure effectively supplies the mast for the boom of the hoist. A remote control is provided for the motor to reverse or de-energize it for controllably raising a load and an automatic stop on the boom de-energizes the motor to stop the load at its end of travel.
REFERENCES:
patent: 754586 (1904-03-01), Maxwell
patent: 872050 (1907-11-01), Burhans
patent: 1509800 (1924-09-01), Vogel
patent: 1569686 (1926-01-01), Tirrell
patent: 2379599 (1945-07-01), Smith
patent: 2670086 (1954-02-01), Eisberg
patent: 2686600 (1954-08-01), Smith
patent: 2744637 (1956-05-01), Stewart
patent: 2917189 (1959-12-01), Isaacs
patent: 3391906 (1968-07-01), Duerst
patent: 4300134 (1981-11-01), Paciorek
Blix Trygve M.
Johnson R. B.
Keegan Robert R.
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