A support assembly including a coupler, a first arm having a proximate end movably coupled to the coupler, a distal end opposite the proximate end, and a second arm having a proximate end movably coupled to the coupler, a distal end opposite the proximate end. The support assembly is movable between a disengaged position and an engaged position. When moving from the disengaged position to the engaged position, the distal end of the first arm and the distal end of the second arm move toward each other.

A grapple for formwork panels includes a scissor arm assembly extending along a longitudinal axis and including at least a proximate pair of arms and a distal pair of arms. The scissor arm assembly is movable between an open position, wherein the distal ends of the distal pair of arms are distanced, and a closed position, wherein the distal ends of the distal pair of arms are in proximity. The grapple further includes a mounting bracket pivotably receiving the proximate pair of arms at the proximate end thereof and a pair of jaw members, each secured to a respective one of the distal pair of arms at the distal ends thereof. Each jaw member has a contact portion, with teeth extending from the contact portion, and having a tip slanted towards the proximate pair of arms, and a deflector guide extending from the contact portion both longitudinally in a direction away from the proximate pair of arms and laterally away from the other jaw member.

In one aspect there is provided a pipe spinner and lifter for supporting and rotating a cylindrical member having a longitudinal axis. The pipe spinner and lifter comprises a pair of jaws that pivot about a pivot member, to allow the pipe spinner and lifter to actuate between an open configuration and a closed configuration. A plurality of rollers are mounted on the jaws, each rotatable about a rolling axis. When the pipe spinner and lifter is in the closed configuration, the cylindrical member can be rotatably captured by the pipe spinner and lifter, allowing the cylindrical member to rotate about its longitudinal axis. Preferably, the plurality of rollers are arranged in a substantially mirrored arrangement on the jaws. More preferably, the rolling axis of each of the rollers is substantially parallel to the cylindrical member's longitudinal axis.

Video sharing is an important part of information exchanging between people in business and in daily personal life. Video sharing between two or more user devices through a server on the Internet usually will consume tremendous network bandwidth. With the supporting of posting and un-posting operations and the dynamic workspace technology introduced in this invention, a server here can centrally coordinate the dynamic secure video sharing between two or more devices while avoiding itself being a bottleneck for the video sharing.

Lifting apparatus for lifting, conveying and/or positioning blocks or slabs, such as blocks or slabs made of concrete, masonry, stone, brick, or similar materials, and methods of lifting, conveying and/or positioning such materials. The lifting apparatus may include two spaced block supporters that are positioned or positionable to respectively mechanically engage a block or slab to support the same mechanically. Upon biasing the two spaced block supporters, the block is engaged and its weight supported, and the block may be lifted, conveyed and/or positioned at a desired location. Unbiasing the block supporters releases the block. A plurality of lifting apparatuses may be used together, including in modular form.

In one aspect there is provided a pipe spinner and lifter for supporting and rotating a cylindrical member having a longitudinal axis. The pipe spinner and lifter comprises a pair of jaws that pivot about a pivot member, to allow the pipe spinner and lifter to actuate between an open configuration and a closed configuration. A plurality of rollers are mounted on the jaws, each rotatable about a rolling axis. When the pipe spinner and lifter is in the closed configuration, the cylindrical member can be rotatably captured by the pipe spinner and lifter, allowing the cylindrical member to rotate about its longitudinal axis. Preferably, the plurality of rollers are arranged in a substantially mirrored arrangement on the jaws. More preferably, the rolling axis of each of the rollers is substantially parallel to the cylindrical member's longitudinal axis.

A lifting beam is provided. The lifting beam includes a lower beam and an upper beam arranged above the lower beam; an arranger for arranging the beams in close and releasable engagement with one another; and systems for gripping the load. The gripping systems are kept in an open position when the beams are in engagement with one another, and in a closed position when an engager is released.

Aspects herein are directed to a clamp having a linkage coupled to a first end of a first and second clamp member. Based on applying a first directional force to the linkage, the linkage generates a force that moves the second ends of the first and second clamp member towards one another, thereby biasing the clamp to the closed position. The clamp secures a strap when the clamp is in the closed position and releases the strap when the clamp is in an open position.

A nut lifting tool of an inner wear part of a cone crusher. The lifting tool has a frame to be placed around a nut to be lifted. The frame has nut lifting lugs for supporting occurring from at least three sides of the center of gravity of the nut and frame suspension brackets for suspending the frame from the nut before lifting the nut. The frame also has an open side for receiving a nut, lateral limiters, which, together with the lifting lugs and the suspension brackets, form a nut receiving space such that the frame can be slid from the open side to surround the nut, and lifting connection pieces for connecting a crane to the frame.

A gripping device for shells that includes a pair of jaws intended to clamp a shell, each jaw being able to pivot towards a closed position obtained by applying the top end of each jaw to the shell. A locking means links the top ends of the jaws and includes two connecting rods and a central segment linking these connecting rods. The connecting rods are articulated relative to the jaws by a first articulation and by a second articulation to the central segment. A spring links each first articulation to a central point of the segment. A movable stop situated above the locking means is capable of pushing the locking means downwards until it is below an unstable equilibrium position of the locking means.