Traversing hoists – Having horizontally swinging boom or bridge – Extensible by movement of boom or boom segment along...
Patent
1980-08-18
1983-07-12
Basinger, Sherman D.
Traversing hoists
Having horizontally swinging boom or bridge
Extensible by movement of boom or boom segment along...
212264, 212267, B66C 2304
Patent
active
043925731
ABSTRACT:
A telescopic strut jib crane includes a jib with at least three telescopic sections and at least one tie rope of fixed length. The rope is fed between the head of the base section and head of the outer section around a pulley at the foot of an intermediate telescopic jib section. One end of the tie rope (12) passes around a support pulley (14) to the rear of the jib around first extension pulley (32) at the head of the outermost jib section (2), down the outermost jib section, around a second extension pulley (28) at the foot of the outermost section, to be anchored at or adjacent (26) the head of the intermediate jib section (4). The other end of the tie rope (12) extends from the support pulley (14) around a third extension pulley (34) at the head of the intermediate section (4), down the intermediate section and around fourth extension pulley (36) at the base of said intermediate section (4), and then to the head of the adjacent lower section (6).
REFERENCES:
patent: 2819803 (1958-01-01), Obenchain
patent: 2999600 (1961-09-01), Gates
patent: 3194413 (1965-07-01), Landry
patent: 3371799 (1968-03-01), Brownwell et al.
patent: 3534867 (1970-10-01), Johnston et al.
patent: 3856151 (1974-12-01), Lamer
Basinger Sherman D.
Coles Cranes Limited
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