Traversing hoists – Overhead – Cable
Patent
1976-11-04
1979-01-23
Makay, Albert J.
Traversing hoists
Overhead
Cable
2541391, B66C 2300
Patent
active
041356276
ABSTRACT:
A hoisting apparatus has a vertical supporting frame, a rearwardly extending base pivotally connected at the lower end of the frame and capable of closing on the frame, a foldable brace is attached at one end to the frame and at the other end to the base so as to lock the base into a supporting position and unlock the base to be pivoted to a closed position against the frame. A forwardly extending boom is pivotally mounted at the upper end portion of the frame. A first pulley is mounted on the upper end of the frame, and a first winding mechanism is attached to the rearward portion of the frame. A first cable passes from the first winding mechanism over the first pulley to the boom for raising and lowering the boom. A second pulley is mounted at the end of the boom. A second winding mechanism attached to the rearward portion of the frame, and a second cable passes from the second winding mechanism over the second pulley for attachment to a load.
REFERENCES:
patent: 845143 (1907-02-01), Taylor
patent: 935391 (1909-09-01), Mohan
patent: 1135799 (1915-04-01), Hogan
patent: 1284277 (1918-11-01), Kattler
patent: 1398204 (1921-11-01), Schowalter
patent: 1824339 (1931-09-01), Forados et al.
patent: 3450386 (1969-06-01), Ewig et al.
patent: 3978989 (1976-09-01), Avila
Johnson R. B.
Makay Albert J.
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