boom hoist

boom hoist

A hoist which has a spar attached to a mast; used to lift and move a load.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Buildings inspectors also tested the safety devices, such as audible and visual warning signals, anti-two block devices, and boom hoist safety shut-offs on the tower cranes to determine whether they were working properly.
* Use of hydraulic cylinders instead of cables for boom hoist is safer since cables call break and cause accidents.
* Use of hydraulic cylinders instead of cables for boom hoist is safer, since cables can break and cause accidents.
Boom hoist, swing, and load drum operation is provided by the independent closed loop hydraulic system, as well as the travel function for the models 555 and 19000.
The boom foot and boom hoist cylinders boast high-performance, wear resistant graphite-impregnated bushings that extend greasing intervals to a remarkable 250 hours, cutting downtime and service costs.
* Single speed hydraulic planetary boom hoist winch.
"The main hydraulic system that operates the boom hoist, stick and swing, as well as the track drives on the tracked version, comprises a Linde HPR 160 high-pressure pump and a modular Linde Synchron Control valve," said Keats.
Six high-pressure Sauer-Danfoss series 90 piston pumps are driven off the pump drive and they provide independent closed loop hydraulic power for the front and rear drums (100 gpm each), boom hoist (60 gpm), swing (60 gpm) and the left crawler and right crawler sections (60 gpm apiece).
The load hoist, boom hoist, swing, right crawler, and left crawler are each powered by their own closed loop hydraulic circuits.