A derrick, especially a drilling rig derrick, including a derrick structure and lifting tackle for a load, for example, a drill string, in the derrick structure.
block and tackle maneuvering the movable chutes
winch and tackle maneuvering the movable chutes
The transmission is of the tackle type.
iii) increase and diminish the length of the tackle with the load suspended from the tackle; and
iii) increase and diminish the length of the tackle with the load suspended from the tackle; and
The system preferably comprises a cross-deck pendant cable coupled to two purchase cables that are wound around low inertia purchase cable spools on opposite ends.
The shafts of the purchase cable spools are mechanically coupled to one or more low inertia induction machines used to arrest the landing aircraft.
A multiple purchase block and tackle system (18) also runs along the longitudinal axis, and has first and second ends attached by a hauling line (24).
The one or more induction machines are preferably cup-type generators, and the generators may be briefly run as motors to initially reduce the tension on the purchase cables.
The resilient means comprising a torsional spring (16) enables the purchase (11) to return to a position for openinf or closing the lid (3) when it has been deflected from that position.
A hoist rotation limiting system for a hoist.
The sensor pendulum (30) serves as a swinging link between the hoist (50) and a crane drive (45) for moving the hoist (50).
Generally, the principle of operation of a hoist is based on the cable being driven by adherence of the cable to the drum of the hoist.
Apparatus and control hoist such that its operation is responsive to a human operator.
Disclosed herein is a turning apparatus using a hoist.
In 1984, following our innovative culture, we developed the Simplified Powered Chain Hoist, which corresponds to the second generation of Powered Chain Hoists.
Our chain hoists meet the requirements of international markets.
A chain guide for guiding a chain within a chain hoist.
A chain hoist (9) driven by a motor (10) is provided to move the vertically adjustable roller carrier (6).
electric chain hoist is a light and small lifting equipment.
Each group of pulley block comprises a pulley supporting mechanism.
Each pulley block includes a crown block portion and a movable block portion.
Each group of lever set (2, 3) is equipped with a group of radial pulley block.
Each hoisting mechanism includes a winding device (1), a wire rope (2) and a pulley block.
The distal end of the transmission cable is attached to this next contiguous pulley block (13).
The chain block (45) is suspended from the trolley.
en EE.UU. also begins to explore the chain block as antifraud method.
The flange (33) removed from the frame (32) is suspended by the chain block (45), and transported vertically and also transported horizontally by means of the trolley (44).
A dismantling device used for dismantling a generator provided in a nacelle (12) comprises an I-beam (41), a presser plate (42), a fixing bolt (43), a trolley (44) and a chain block (45).
The rope block (1) comprises in this manner a reliable and safe ratchet mechanism (5) showing a long life.
let will not hoist to the entire scope of the block they appear in.
Used where mechanical advantage greater than that obtainable by block and tackle was needed (such as raising the anchor on small ships).
When the museum burned in 1865, it took 18 men with a block and tackle to rescue her.
When the museum burned in 1865, it took 18 men with a block and tackle to rescue her.
As a result of being hung from the hoist, Valkyrie would stay upright whenever a test movement failure might cause her to fall.
It seems that I have fallen into my own trap (“hoist by my own petard” as Shakespeare said in Hamlet).
Of course, falls go hand-in-hand with this type of research, which is why the University of Edinburgh wanted to invest in a suitable safety hoist.
1、hammer piling machine, pile hammer is a steel weight, by the hoist with a hook to lift, decoupling along the guide frame free fall and piling.
chute winch
A hoist or capstan comprises a driving pulley (8).
Provided is a suspension electric hoist which is excellently balanced in the horizontal direction.
A mobile support for a hoist including a frame (101) wherein the frame is mounted on a plurality of casters (109, 116); the frame is adapted to support a hoist (313) and sling (111).
Two hoists (106, 108) are installed to be capable of moving along the circulating boom (100), each having a hoist motor (110) and a hoist wheel (112).
This pendant responsive crane control system has a sensor pendulum (30) arranged above a hoist (50) for the crane (10) and a load sensor (35) for determining the load lifted by the hoist (50).
An elevator apparatus where a maintenance space for a hoist can be secured without expanding an installation space even if the diameter of the hoist is increased.
A motorized hoist (electric, pneumatic or hydraulic): this type of hoist is especially adapted for regular use.
An electric hoist of a type where an electric winch is suspended from the hoist, in which the winch is maintained horizontal in any load handling work.
Next, the movable shelf moves to a position underneath the overhead hoist.
A controller monitors hoist speed and hoist torque feedbacks that are input into the model and processed using a filter, as well as a previously determined load value.
Load hoist lifts the hook to place the bicycle in a hanging position.
A hoist for an elevator, wherein the rotation of a drive sheave is braked by a brake part.
HOIST, AUXILIARY - A supplemental hoisting unit, usually designed to handle lighter loads at a higher speed than the main hoist.
A safe electric hoist and versatile piece of equipment
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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