Hoist for retrieving and lifting loads

Traversing hoists – Boom position lock

Reexamination Certificate

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Details

C212S299000

Reexamination Certificate

active

07370769

ABSTRACT:
A hoist for retrieving, lifting and positioning a light load of up to about 1000 lbs, is described. The hoist comprises a boom support column having an attaching lower end and a boom support upper end. The boom support upper end has a boom assembly connector and a transverse support surface. The boom assembly has a connecting support wall and a lower projecting connector for rotational connection with the boom assembly connector for maintaining the boom at an upward angular position. A releasable locking mechanism locks the boom at the upward angular position. A boom actuating brake arrests rotational displacement between the connecting support wall and the transverse support surface when the boom is at a substantially horizontal load retrieving position. A pulley is rotatably secured to an axle secured at a free end of the boom. The pulley is adapted to guide a cable thereon through a cable guide linkage to align and maintain the cable on the pulley. The pulley is supported on an axle which is connected to a lateral pivot support.

REFERENCES:
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patent: 3308611 (1967-03-01), Barber
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patent: 3653193 (1972-04-01), Coughran, Jr.
patent: 3819059 (1974-06-01), Mantel
patent: 4141591 (1979-02-01), Spicer
patent: 4597498 (1986-07-01), Spinosa et al.
patent: 5445487 (1995-08-01), Koscinski, Jr.
patent: 5758785 (1998-06-01), Spinosa et al.
patent: 5853282 (1998-12-01), Bechler et al.
patent: 6071065 (2000-06-01), Zackovich

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