A tank cover lifting tool is configured to remove or attach tank covers. The tank cover lifting tool includes a handle center support, a first handle connected to one end of the handle center support, and a second handle connected to another end of the handle center support. In addition, the tank cover lifting tool includes a first lifting block that is locked on the handle center support and that is configured to engage a first tank cover handle of a tank cover. Further, the tank cover lifting tool includes a second lifting block that is locked on the handle center support and that is configured to engage a second tank cover handle of the tank cover.

There is provided a working vehicle capable of simplifying a structure and reducing manufacturing costs by realizing a configuration in which a tying-down attachment point doubles as a lifting attachment point. A working vehicle according to the present invention includes tying-down attachment points for locking a tightening member for preventing reversal at the time of transportation or parking in at least the front of a vehicle body, in which the tying-down attachment points are arranged at right-and-left two places on a front end surface of the vehicle body, capable of locking a lifting member for lifting the vehicle body upward and having strength in a vertical direction enough to withstand a load applied at the time of lifting the vehicle body upward after locking the lifting member, thereby doubling as lifting attachment points.

There is provided a working vehicle capable of simplifying a structure and reducing manufacturing costs by realizing a configuration in which a tying-down attachment point doubles as a lifting attachment point. A working vehicle according to the present invention includes tying-down attachment points for locking a tightening member for preventing reversal at the time of transportation or parking in at least the front of a vehicle body, in which the tying-down attachment points are arranged at right-and-left two places on a front end surface of the vehicle body, capable of locking a lifting member for lifting the vehicle body upward and having strength in a vertical direction enough to withstand a load applied at the time of lifting the vehicle body upward after locking the lifting member, thereby doubling as lifting attachment points.

A combination hook assembly and unmanned aerial vehicle (UAV) are adapted to tow a cable. The fuselage of the UAV includes a mounting surface. The hook assembly includes a first member and a second member. The first member has a distal end, and a proximate end mounted on and projecting transverse the mounting surface. The second member is mounted on the distal end and projects transverse thereto. The cable is engageable with the hook assembly.

A combination hook assembly and unmanned aerial vehicle (UAV) are adapted to tow a cable. The fuselage of the UAV includes a mounting surface. The hook assembly includes a first member and a second member. The first member has a distal end, and a proximate end mounted on and projecting transverse the mounting surface. The second member is mounted on the distal end and projects transverse thereto. The cable is engageable with the hook assembly.

Disclosed is an unmanned automated hook-fastening device including a device coupler, a propulsion unit, a transmitter, a receiver, hook pliers, and an unloading transmitter. The propulsion unit adjusts the position of the hoisting unit with respect to the object, on the basis of the position signal transmitted by the transmitter and received by the receiver, and adjusts the position of the hoisting unit coupled to the object, on the basis of the position signal transmitted by the unloading transmitter and received by the receiver. It is possible to easily track the position of a hook of the object to be hoisted, automatically fasten the hook pliers to the hook, and automatically fasten the hook to a crane without a monitoring system.

Disclosed is an unmanned automated hook-fastening device including a device coupler, a propulsion unit, a transmitter, a receiver, hook pliers, and an unloading transmitter. The propulsion unit adjusts the position of the hoisting unit with respect to the object, on the basis of the position signal transmitted by the transmitter and received by the receiver, and adjusts the position of the hoisting unit coupled to the object, on the basis of the position signal transmitted by the unloading transmitter and received by the receiver. It is possible to easily track the position of a hook of the object to be hoisted, automatically fasten the hook pliers to the hook, and automatically fasten the hook to a crane without a monitoring system.

A lifting hook, comprising a linear mid-section; a first curved section extending from the mid-section and ending in a generally flat distal end or toe for inserting into an aperture in a drill casing; and a second curved section extending from the mid-section opposite the first curved section and having a flattened distal end defining an eye or hole.

A lifting hook, comprising a linear mid-section; a first curved section extending from the mid-section and ending in a generally flat distal end or toe for inserting into an aperture in a drill casing; and a second curved section extending from the mid-section opposite the first curved section and having a flattened distal end defining an eye or hole.

A crane hook rotation-limiting device includes a mounting base and a plunger extending through a hole formed in the mounting base so as to be movable with respect to the mounting base. A spring first bearing portion is connected to the plunger so as to be movable with the plunger. A spring second bearing portion is positioned opposite the spring first bearing portion so as to be fixed with respect to the plunger during movement of the plunger. A spring member extends between the spring first bearing portion and the spring second bearing portion. A pair of crane hook rotation-limiting devices as described herein may be mounted to a crane hook assembly to control rotation of the crane hook during movement of the hook when the hook supports a sling spreader or a sling spreader and a die (or other item of tooling).