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2. Lewis (lifting appliance) - Wikipedia

   en.wikipedia.org/wiki/Lewis_(lifting_appliance)

   The first outer leg is inserted into the lewis hole, followed by the second outer leg. The inner (parallel) leg is inserted last, pushing the outer legs into contact with the inside of the lewis hole. The shackle is unbolted, placed over the legs, and the bolt fastened through both the shackle eyes and the eye in the top of each leg.

3. Four-bar linkage - Wikipedia

   en.wikipedia.org/wiki/Four-bar_linkage

   In the study of mechanisms, a four-bar linkage, also called a four-bar, is the simplest closed-chain movable linkage. It consists of four bodies, called bars or links, connected in a loop by four joints. Generally, the joints are configured so the links move in parallel planes, and the assembly is called a planar four-bar linkage. Spherical and ...

4. Lifting Operations and Lifting Equipment Regulations 1998

   en.wikipedia.org/wiki/Lifting_Operations_and...

   The Lifting Operations and Lifting Equipment Regulations 1998 (LOLER) are set of regulations created under the Health and Safety at Work etc. Act 1974 which came into force in Great Britain on 5 December 1998 [1] and replaced a number of other pieces of legislation which previously covered the use of lifting equipment.

5. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   The first type of crane machine was the shadouf, which had a lever mechanism and was used to lift water for irrigation. [3] [4] [5] It was invented in Mesopotamia (modern Iraq) circa 3000 BC. [3] [4] The shadouf subsequently appeared in ancient Egyptian technology circa 2000 BC. [5] [6]

6. Linkage (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Linkage_(mechanical)

   Each link in a chain is connected by a joint to one or more other links. Thus, a kinematic chain can be modeled as a graph in which the links are paths and the joints are vertices, which is called a linkage graph. The deployable mirror linkage is constructed from a series of rhombus or scissor linkages. An extended scissor lift

7. Sidelifter - Wikipedia

   en.wikipedia.org/wiki/Sidelifter

   Chains, which are attached from the top of the cranes to the corner castings at the base of the container(s) during lifting operations. There is a special linking device that when placed between two 20 ft containers allows the user to lock two 20 ft (2 TEUs ) containers together allowing the sidelifter to lift them as if they were a 40 ft ...