Traversing hoists – Having vertically swinging boom – Extensible by movement of boom or boom segment along...
Patent
1981-08-17
1984-12-25
Blix, Trygve M.
Traversing hoists
Having vertically swinging boom
Extensible by movement of boom or boom segment along...
212231, 212227, 212239, 212261, 212262, 212268, 212186, B66C 2304, B66C 700, B66C 2356
Patent
active
044898380
ABSTRACT:
A telescopic boom is disclosed which is pivotally supported by its base section for movement about a horizontal axis. The boom is supported by a live mast through multi-part pendant lines, which pendant lines are each reeved over sheaves attached to the boom at the forward end of the base section and at the forward end of another boom section to support the boom at a plurality of points forwardly of the live mast. The forward end of each pendant is preferably received within the boom over sheaves journaled on the cylinder case of a boom extending ram and on selected sections of the boom. The multi-part pendant supported boom reduces boom droop caused by extension of the boom approximately 50% of that of a boom supported at a single point by each pendant line.
REFERENCES:
patent: 548375 (1895-10-01), Loveridge
patent: 2698096 (1954-12-01), Hughes
patent: 2868392 (1959-01-01), Poffenberger
patent: 2999600 (1961-09-01), Gates
patent: 3072265 (1963-01-01), Nickles
patent: 3194413 (1965-07-01), Landry
patent: 3308967 (1967-03-01), Barkley et al.
patent: 3371799 (1968-03-01), Brownell et al.
patent: 3398492 (1968-08-01), Nansel
patent: 3465899 (1969-09-01), Reuter et al.
patent: 3534867 (1970-10-01), Johnston et al.
patent: 3727359 (1973-04-01), Vonck
patent: 3842985 (1974-10-01), Svede
patent: 3856151 (1974-12-01), Lamer
patent: 4010852 (1977-03-01), Goss et al.
patent: 4053058 (1977-10-01), Jensen et al.
patent: 4156331 (1979-05-01), Lester et al.
patent: 4352434 (1982-10-01), Poock
patent: 4363413 (1982-12-01), Gyomrey
Blix Trygve M.
FMC Corporation
Johnson R. B.
Kamp R. C.
Megley R. B.
LandOfFree
Low droop multi-part pendant supported boom does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low droop multi-part pendant supported boom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low droop multi-part pendant supported boom will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1148690