Embodiments of a top-mounted hoisting system include a single-layer winch drum located at an uppermost end of a derrick or drilling mast, a drill string handling tool, and one or more drill lines extending from the single layer winch drum to the drill string handling tool. The drill string handling tool may be a top drive. When the drill line is connected directly to the lifted load, the drill line experiences far less load cycles than when the line runs through crown and travelling blocks. If the drum diameter is large enough, cut-and-slip operations may be eliminated, and the drill line may be replaced at longer time intervals. Embodiments provide for lower weight and may provide lower cost as a result. The top-mounted drum does not take up any space on the drill floor and less total length of drill line is also required than if the drum was floor-mounted.

Embodiments of a top-mounted hoisting system include a single-layer winch drum located at an uppermost end of a derrick or drilling mast, a drill string handling tool, and one or more drill lines extending from the single layer winch drum to the drill string handling tool. The drill string handling tool may be a top drive. When the drill line is connected directly to the lifted load, the drill line experiences far less load cycles than when the line runs through crown and travelling blocks. If the drum diameter is large enough, cut-and-slip operations may be eliminated, and the drill line may be replaced at longer time intervals. Embodiments provide for lower weight and may provide lower cost as a result. The top-mounted drum does not take up any space on the drill floor and less total length of drill line is also required than if the drum was floor-mounted.

An overhead storage device or system may include a mechanism for hoisting the object to be stored (e.g., a bicycle) at an elevated height (e.g., above grade or floor level). In general, the present teachings may include a cable pulley engaged with a constant torque spring unit structurally configured to apply an approximately constant torque to the cable spool that promotes rotation of a spool thereof for winding of a lift cable about the spool to lift a load. Also disclosed are techniques for improving such a constant toque lifting unit such as an inertial brake structurally configured to slow down or stop an undesired, accelerated winding of a lift cable, a self-coiling device structurally configured to advantageously wind the lift cable a predetermined amount (e.g., for removal of same as a hinderance), and an attachment mechanism structurally configured to securely couple to a load.

The present disclosure provides a trawler with a fishing and conveying device and a fishing method, and belongs to the technical field of trawlers. The trawler of the present disclosure includes a hull structure and two fishing devices, wherein the fishing device includes a first rotary rod, a second rotary rod, a fixing frame and a fish suction mechanism, the first rotary rod is hinged at the bow of the hull structure, a fishing net is connected on the first rotary rod, the second rotary rod is hinged at the stern of the hull structure. The present disclosure is capable of realizing continuous fishing and directly conveying the fish onto the trawler, and thus is simple to operate.

The present disclosure provides a trawler with a fishing and conveying device and a fishing method, and belongs to the technical field of trawlers. The trawler of the present disclosure includes a hull structure and two fishing devices, wherein the fishing device includes a first rotary rod, a second rotary rod, a fixing frame and a fish suction mechanism, the first rotary rod is hinged at the bow of the hull structure, a fishing net is connected on the first rotary rod, the second rotary rod is hinged at the stern of the hull structure. The present disclosure is capable of realizing continuous fishing and directly conveying the fish onto the trawler, and thus is simple to operate.

The present disclosure describes a winch comprising a recoiling mechanism engaged to a winding member having a strap installed on, and wound around, the winding member. By rotating the strap away from the winding member to secure an object to the winch, a coil, which is positioned within the recoiling mechanism, is rotated from an unbiased position at rest to a biased position not at rest. Once the strap is disconnected and a locking gear is disengaged, the coil is naturally rotated back to its original unbiased position at rest, which in turn rotates the winding member and rewinds the strap around it.

The present disclosure describes a winch comprising a recoiling mechanism engaged to a winding member having a strap installed on, and wound around, the winding member. By rotating the strap away from the winding member to secure an object to the winch, a coil, which is positioned within the recoiling mechanism, is rotated from an unbiased position at rest to a biased position not at rest. Once the strap is disconnected and a locking gear is disengaged, the coil is naturally rotated back to its original unbiased position at rest, which in turn rotates the winding member and rewinds the strap around it.

The present disclosure describes a winch comprising a recoiling mechanism engaged to a winding member having a strap installed on, and wound around, the winding member. By rotating the strap away from the winding member to secure an object to the winch, a coil, which is positioned within the recoiling mechanism, is rotated from an unbiased position at rest to a biased position not at rest. Once the strap is disconnected and a locking gear is disengaged, the coil is naturally rotated back to its original unbiased position at rest, which in turn rotates the winding member and rewinds the strap around it.

The present disclosure describes a winch comprising a recoiling mechanism engaged to a winding member having a strap installed on, and wound around, the winding member. By rotating the strap away from the winding member to secure an object to the winch, a coil, which is positioned within the recoiling mechanism, is rotated from an unbiased position at rest to a biased position not at rest. Once the strap is disconnected and a locking gear is disengaged, the coil is naturally rotated back to its original unbiased position at rest, which in turn rotates the winding member and rewinds the strap around it.

Embodiments of a top-mounted hoisting system include a single-layer winch drum located at an uppermost end of a derrick or drilling mast, a drill string handling tool, and one or more drill lines extending from the single layer winch drum to the drill string handling tool. The drill string handling tool may be a top drive. When the drill line is connected directly to the lifted load, the drill line experiences far less load cycles than when the line runs through crown and traveling blocks. If the drum diameter is large enough, cut-and-slip operations may be eliminated, and the drill line may be replaced at longer time intervals. Embodiments provide for lower weight and may provide lower cost as a result. The top-mounted drum does not take up any space on the drill floor and less total length of drill line is also required than if the drum was floor-mounted.