Traversing hoists – With haul-in line
Patent
1981-12-16
1986-07-01
Barefoot, Galen L.
Traversing hoists
With haul-in line
212149, 212153, 212159, 212205, 212216, B66C 1306, B66C 1316, B66C 1700, B66C 1102
Patent
active
045974977
ABSTRACT:
A hoist 10 with redundant safety features comprising: a hoist support frame; a lifting drum 14 mounted on the hoist support frame; a load block assembly 28; an equalizer assembly 24 mounted on the hoist support frame; the load block assembly 28 being suspended by a first set of ropefalls 30 and 36 and a second set of ropefalls 32 and 34, each of the ropefalls having one end secured to lifting drum 14 and the other end secured to equalizer assembly 24, each of the sets of ropefalls having sufficient load bearing capacity to carry the load carried by the other set of ropefalls in addition to its own load; each of the ropefalls having first sections extending from lifting drum 14 to load block assembly 28 and second sections extending from load block assembly 28 to equalizer assembly 24, each of the first sections being positioned in a substantially common plane with each other and each of the second sections being positioned in another substantially common plane with each other; equalizer assembly 24 including a first load balancing mechanism for balancing the load carried by the first set of ropefalls, a second load balancing mechanism for balancing the load carried by the second set of ropefalls, and a load sensor for generating an electrical signal in response to variations in the load carried by the first or second second set of ropefalls. A trolley 12 for supporting hoist 10, and an auxiliary hoist 56 associated with trolley 12 is also disclosed.
REFERENCES:
patent: 2609181 (1952-09-01), Jaeschke
patent: 3786935 (1974-01-01), Vlazny et al.
patent: 3841495 (1974-10-01), Dronick et al.
patent: 3866200 (1975-02-01), Paredes et al.
patent: 3973679 (1976-08-01), Hass et al.
patent: 4069921 (1978-01-01), Raugulis et al.
patent: 4073476 (1978-02-01), Frank
patent: 4175727 (1979-11-01), Clarke
patent: 4177973 (1979-12-01), Miller et al.
Barefoot Galen L.
Johnson R. B.
Koehring Morgan
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