A skate drive system for a catwalk having a skate and a clamping assembly. The system includes a primary actuator and a secondary actuator. The primary actuator is configured to apply a drive force to first and second cables to move the skate along a trough of the catwalk. The secondary actuator is configured to apply a tension force to at least one of the first and second cables independent of the primary actuator to actuate the clamping assembly from an unclamped position to a clamped position.

A portable gantry crane formed of composite members includes a composite material I-beam. Two or more support members are formed of a composite material and each support member supports the I-beam when the portable gantry crane is in an upright position. Two or more end housings are included, each end housing enclosing a top end of one of the two or more support members and coupled thereto using adhesive. A plurality of latch structures are coupled with the I-beam, each latch structure including a latch, and each end housing having a latch receiver, each latch in combination with a latch receiver allowing one of the latch structures to be releasably fixedly coupled with an end housing. In implementations a plurality of latch structures are coupled with the I-beam, each latch structure having a latch structure enclosure and each latch structure enclosure at least partially enclosing one of the end housings.

A hunted game winching assembly for drawing hunted game through uneven area includes a winch has a cable is wrapped therearound when the winch is turned on to rotate in a first direction. The cable is drawn off of the winch when the winch is urged to rotate in a second direction. A harness is releasably coupled to the cable and the harness is positionable around hunted game. In this way the winch can draw the hunted game toward the winch when the winch is turned on the rotate in the first direction. A pair of handles is each of the handles is coupled to and extends in opposite directions from the winch. Each of the handles can be gripped to positioned the winch between a user and the hunted game.

The invention is directed to portable winch systems comprising a winch that is powered by a rechargeable first power source operably connected to the winch and a second power source operably connected to the rechargeable first power source and/or the winch. In certain embodiments, the system comprises a frame and/or housing to which one or more of the winch system components is mounted. In some embodiments, the portable winch system comprises a mechanism to mount the system to a hitch receiver of a vehicle or other object and/or mechanisms for transporting the system, such as casters and/or handles.

A wireless hoist system including a first hoist device having a first motor and a first wireless transceiver and a second hoist device having a second motor and a second wireless transceiver. The wireless hoist system includes a controller in wireless communication with the first wireless transceiver and the second wireless. The controller is configured to receive a user input and determine a first operation parameter and a second operation parameter based on the user input. The controller is also configured to provide, wirelessly, a first control signal indicative of the first operation parameter to the first hoist device and provide, wirelessly, a second control signal indicative of the second operation parameter to the second hoist device. The first hoist device operates based on the first control signal and the second hoist device operates based on the second control signal.

A snatch block has a stationary first cheek and a movable second cheek that is slidable in its respective plane relative to the stationary first cheek. In a closed position, the second cheek connects with a crown jutting from the first cheek, thereby closing off a swallow of the snatch block. In an open position, an access gap opens into the swallow between the movable second cheek and the crown, thus enabling loading of a rope into the swallow. A locking mechanism with slide latches or rocker arms normally locks the second cheek in the closed position, and requires simultaneous actuation of two discretely separate releases to unlock the second cheek. The second cheek is biased into the open position, providing overt visual indication of any failed latching attempt. A seamlessly integral stud protrudes from the crown to rotatably support a swivel eye thereon.

A device, system and method are used for hoisting and lowering a load. The device has a front plate that may be displaced to reveal a sheave. The device also has a friction accessory. The friction accessory is arranged to create friction between a rope and the device when a load is suspended from the device using the rope and where the device is secured to a support structure. The system may be prepared by an operator, having ascended to an elevated location, and further allows the operator to lower the load from the elevated location prior to descending.

A mobile winching system is provided, whereby a preferred embodiment describes a motorized winch and power source mounted on a small frame that includes wheels, a handle, and a means for securing the winch system during operation. This mobile winch system provides a way to transport and operate a winch in areas that are otherwise inaccessible by traditional vehicle mounted winches.

A remote controlled pulley device for moving a cord of an underwater accessory comprising a motor; a drive pulley and a follower pulley spaced a distance from the drive pulley for frictionally engaging cord there between. A receiver is in communication the motor, where signals from the receiver cause the motor to turn on and off, which in turn causes the drive pulley to move or rotate in a forward or reverse direction, thus moving the cord frictionally engaged therewith. A battery is provided and configured to power the motor. A battery powered hand-held remote control device is provided and the receiver is configured to receive commands from the hand-held remote control to rotate the drive pulley and thus move the cord.

A remote controlled pulley device for moving a cord of an underwater accessory comprising a motor; a drive pulley and a follower pulley spaced a distance from the drive pulley for frictionally engaging cord there between. A receiver is in communication the motor, where signals from the receiver cause the motor to turn on and off, which in turn causes the drive pulley to move or rotate in a forward or reverse direction, thus moving the cord frictionally engaged therewith. A battery is provided and configured to power the motor. A battery powered hand-held remote control device is provided and the receiver is configured to receive commands from the hand-held remote control to rotate the drive pulley and thus move the cord.