Traversing hoists – Having counterweight or counterbalancing means
Patent
1980-07-09
1983-04-26
Kashnikow, Andres
Traversing hoists
Having counterweight or counterbalancing means
212183, 212239, B66C 2300
Patent
active
043810608
ABSTRACT:
A ring supported mobile lift crane includes a load carrier and a counterweight carrier in riding contact with the ring and a tower mounted on the carrier for pivotal movement between generally horizontal and vertical positions with a boom pivoted to the outer end of the tower and a rearwardly inclined mast mounted on said carrier and connected to the counterweight carrier by rigging a mast pendant, a tower backstay connected to the top of the tower and through tower hoist rigging to the top of the mast. A fixed boom strut is connected at one end to the top of the tower and at the other end to a fixed pendant secured to the carrier and a movable boom strut is connected at one end to the top of the tower and at the other end to a fixed pendant secured to the outer end of the boom, with a multi-part boom hoist line interconnecting the outer ends of the fixed and movable boom struts for raising and lowering the boom, and a tower erection hoist for changing the length of the tower hoist rigging for raising and lowering the tower, boom, boom struts and tower backstay as a unit.
REFERENCES:
patent: 3868022 (1975-02-01), Greenlay et al.
patent: 3878944 (1975-04-01), Beduhn et al.
patent: 4042115 (1977-08-01), Beduhn et al.
patent: 4159776 (1979-07-01), Holter
patent: 4194638 (1980-03-01), Morrow, Sr. et al.
patent: 4195740 (1980-04-01), Beduhn et al.
Anderson Michael C.
Morrow, Sr. James G.
Kashnikow Andres
The Manitowoc Company Inc.
Williams L. E.
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