Counterbalanced tower crane

Details Counterbalanced tower crane Counterbalanced tower crane

1979-05-18

1981-01-06

Marbert, James B.

Traversing hoists

Having counterweight or counterbalancing means

Counterweight movable relative to load support

B66C 2376

Patent

active

042431484

ABSTRACT:
A vertical tower and lifting boom are counterbalanced by a separately supported counterweight unit. The counterweight unit is self-propelled and connected to a mobile tower platform by a horizontal stinger. A diagonal tower brace extends between the outer end of the stinger and the upper end of the tower for transmission of rotational forces about the vertical tower axis. A vertical counterweight strut is connected between the counterweight unit and the outer end of a pivoted staymast that extends rearwardly in opposition to the boom.

REFERENCES:
patent: 3777900 (1973-12-01), Brewer
patent: 3794194 (1974-02-01), Higgins
patent: 3836010 (1974-09-01), Lampson
patent: 3842984 (1974-10-01), Brown et al.
patent: 3868022 (1975-02-01), Greenlay et al.
patent: 3921815 (1975-11-01), Brown
patent: 3930583 (1976-01-01), Jouffray
patent: 3955684 (1976-05-01), Novofny
patent: 4103783 (1978-08-01), Beduhn
patent: 4170309 (1979-10-01), Lampson
patent: 4194638 (1980-03-01), Morrow, Sr. et al.

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