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A knuckle boom crane, also knowns as an articulating boom crane, is a kind of standard crane whose boom articulates at a 'knuckle', letting it fold back like a finger. This provides a compact size for storage and manoeuvring. Other knuckle booms are typical in North American 
Knuckle boom cranes have become very common on offshore vessels for such purposes as fishing as less of the deck space is blocked by the crane. Disadvantages of this crane type are the higher power demand and increased maintenance requirement due to the increased number of moving parts.
Knuckle boom crane arms are much lighter than boom truck cranes, and they are designed to allow for more payloads to be carried on the back of the truck that it is mounted on. The majority of them are mounted behind the cab and leave the entire bed of the truck empty.
The cranes come with different types of control systems, such as: stand up, control from the ground, seat control, or radio remote control. The radio remote systems now can start the crane as well as run the crane. Currently, they come equipped with a computer readout system that immediately gives readouts from the system if the crane is overloaded or not.
The
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Cranes by type {{engineering-stub
A knuckle boom crane, also knowns as an articulating boom crane, is a kind of standard crane whose boom articulates at a 'knuckle', letting it fold back like a finger. This provides a compact size for storage and manoeuvring. Other knuckle booms are typical in North American excavators
Excavators are heavy equipment (construction), heavy construction equipment primarily consisting of a backhoe, boom, dipper (or stick), Bucket (machine part), bucket, and cab on a rotating platform known as the "house".
The modern excavator's ...
, which usually have two articulations like an index finger
The index finger (also referred to as forefinger, first finger, second finger, pointer finger, trigger finger, digitus secundus, digitus II, and many other terms) is the second digit of a human hand. It is located between the thumb and the m ...
. Most often seen are hydraulically-actuated
A hydraulic cylinder (also called a linear hydraulic motor) is a mechanical actuator that is used to give a unidirectional force through a unidirectional stroke. It has many applications, notably in construction equipment (engineering vehicles), ...
knuckle booms.
Synopsis
Knuckle boom cranes have become very common on offshore vessels for such purposes as fishing as less of the deck space is blocked by the crane. Disadvantages of this crane type are the higher power demand and increased maintenance requirement due to the increased number of moving parts.
Knuckle boom crane arms are much lighter than boom truck cranes, and they are designed to allow for more payloads to be carried on the back of the truck that it is mounted on. The majority of them are mounted behind the cab and leave the entire bed of the truck empty.
The cranes come with different types of control systems, such as: stand up, control from the ground, seat control, or radio remote control. The radio remote systems now can start the crane as well as run the crane. Currently, they come equipped with a computer readout system that immediately gives readouts from the system if the crane is overloaded or not.
The technical standard
A technical standard is an established Social norm, norm or requirement for a repeatable technical task which is applied to a common and repeated use of rules, conditions, guidelines or characteristics for products or related processes and producti ...
in the US is known as ASME
The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing edu ...
B30.22.
Notable manufacturers
*Hiab
Hydrauliska Industri AB (Hiab) is a Swedish manufacturer of loader cranes, demountable container handlers, forestry cranes, knuckle boom cranes, truck-mounted forklifts and tail lifts. The company is owned by the Cargotec Corporation.
Hist ...
* Palfinger
The Palfinger AG (stylized as PALFINGER AG), headquartered in Bergheim, Austria, is a publicly traded technology and machinery manufacturing company for hydraulic crane and lifting equipment for the land and maritime sectors. The company, found ...
* Fassi Crane
* Atlas Cranes GMBH
* Komatsu Limited
or is a Japanese multinational corporation that manufactures construction, mining, forestry and military heavy equipment, as well as diesel engines and industrial equipment like press machines, lasers and thermoelectric generators. Its headq ...
See also
* Crane (machine)#Loader craneReferences
External links
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Cranes by type {{engineering-stub