A method for regulating the speed of a clamping and lifting device (1) with at least one guide cylinder (2). A hydraulic fluid can flow in and out through in each case one opening in at least two cylinder chambers of the at least one guide cylinder (2) via at least one pump device and via at least one valve device per cylinder chamber for lifting and lowering loads (16). The degree of opening of the valve of the at least one valve device in each case can be changed as a function of the working direction of the device (1), a setpoint speed (10) and the current speed (11) of the at least one guide cylinder (2).

A shake-proof hook is provided, which includes a hook end that defines a receptacle. The hook end includes a lead-in portion and a channel spaced apart from the lead-in portion. The shake-proof hook includes a coupling end coupled to the hook end. The coupling end includes a retaining portion and at least one coupling ring. The retaining portion extends along a first axis transverse to a longitudinal axis of the shake-proof hook and the at least one coupling ring extends along a second axis. The second axis is transverse to the longitudinal axis and the second axis is different than the first axis.

A mobile winching system is provided, whereby a motorized winch, battery, and controller are mounted on a metal plate that is attached to and may be enclosed within a bag, wherein the metal plate has attachment points for coupling an anchor component to fix the winch system in position during a winching operation. The mobile winch in a bag system provides a way to transport and operate a winch in areas that are otherwise inaccessible by traditional vehicle mounted winches without the necessity of separately transporting the components of the system and with reduced setup of the components for use.

A machine for extracting a ductile pipe. The machine has a vise which can grip the pipe, and a wire clamp. Each of the wire clamp and vise are supported on a carriage which is movable relative to a frame. This enables the vise to grip and pull the ductile pipe. Additionally, a wire strand may be disposed through the pipe from a far end to the end at which the machine is placed. The wire clamp allows the machine to pre-stress the strand to improve the extraction of the ductile pipe.

A movable cable spooling apparatus including a drum and a cable. The drum is arranged for winding and unwinding the cable. It may include a frame with wheels for moving the apparatus in which the frame supports the drum. It may include a cable guide forming an exit and entry for the cable to be wound on or unwound from the drum. The frame may include a rigid base plate that supports the drum and the cable guide. The cable may run adjacent to the rigid base plate between the drum and the cable guide.

The present disclosure pertains to a process for monitoring stress applied to a tendon by a hydraulic jack during tensioning of concrete. The process may include measuring an amount of hydraulic fluid that flows through the hydraulic jack during tensioning. The measured amount of hydraulic fluid is correlated with an amount of stress applied per unit of hydraulic fluid to determine a total amount of stress employed on the tendon. The process may also include measuring the distance of travel of the hydraulic piston. The measured travel can be used to calculated the distance the tendon has been pulled (elongation) as well as the stress applied to the tendon.

Provided herein is a controller configured to determine the position, direction, or speed of a wheelchair during ingress or egress in a wheelchair accessible vehicle. The controller may receive input from any combination of sensors configured to provide signals indicative of the wheelchair position, direction, or speed, such as cameras, light curtains, and floor pressure sensors. The controller can be configured to sense and correct unsafe conditions, such as the wheelchair approaching an edge of a ramp, and to sense when the wheelchair has reached a final securement position and/or has departed the vehicle.

Provided herein is an electronically-controlled wheelchair securement system with a winch apparatus that is adapted for pulling and steering a mobility device (e.g., wheelchair, scooter, stretcher, etc.) up and down the ramp of a rear-entry wheelchair accessible vehicle and for providing securement for the mobility device during transport.