A crane hook block includes a frame, at least one pulley rotatably connected to the frame, a load hook connected to the frame, at least one sensor arranged on the crane hook block and designed to detect at least one ambient parameter and/or at least one status parameter of the crane hook block, and an interface connected to the at least one sensor and designed to transmit the data received from the at least one sensor.

A hydraulic system for controlling bleed down and retraction of a boom within a safety envelope includes a backup battery power supply, and at least a first boom lift hydraulic cylinder configured to raise and lower the boom. The first boom lift hydraulic cylinder includes a solenoid bleed valve electrically connected to the backup battery power supply. The hydraulic system also includes an input device controllable by an operator of the boom. The input device may, for instance, be used by the operator to initiate bleed down and retraction of the boom from an elevated position. To accommodate independent failsafe features of the system, the input device is configured to selectively actuate the solenoid bleed valve using electrical power supplied from the backup battery power supply.

The present invention addresses the problem of providing a crane capable of detecting a suspension location of a payload, in order to enable accurate positioning of a hook at the suspension location of the payload. This crane comprises: a freely derricking boom provided to a swivel; and a sub-hook block and a sub-hook suspendedly provided from the boom. The crane also comprises: a boom camera capable of imaging a payload that is to be carried by the crane; hook cameras capable of imaging the payload from different viewpoints than the boom camera; and a control device for controlling the crane. The control device acquires images obtained by imaging the payload with the boom camera and the hook cameras, runs image processing on the images, and calculates a suspension location of the payload.

Crane assembly including a crane base, a column, and a first actuator for rotating the column in relation to the crane base. A crane boom system includes a liftable and lowerable crane boom which is articulately connected to and movable in relation to the column by a second actuator. A support arrangement includes a stabilizer beam and two stabilizer legs, wherein the two stabilizer legs are arranged to be extended from the stabilizer beam and set to ground during operation of the crane boom system to support the stability of the vehicle and crane assembly. A battery arrangement includes a battery cell, and a battery circuitry unit provided with an electrical power take off, and a battery mounting assembly structured to fixedly mount the battery arrangement to the stabilizer beam. The battery arrangement is configured to electrically operate the first actuator and the second actuator via the electrical power take-off.

A crane is disclosed, the crane includes detachable hydraulic cylinder including a head side oil chamber and a rod side oil chamber both to be connected to a control valve through a joint, in which a head side hydraulic detecting section and a rod side hydraulic detecting section are each provided to the hydraulic cylinder, and a connection state between the hydraulic cylinder and the control valve is determined based on a head side hydraulic pressure and a rod side hydraulic pressure in a period until a predetermined time elapses after supply of electric power to the head side hydraulic detecting section and the rod side hydraulic detecting section is started and an operation tool for hydraulic cylinder switches the control valve to a state of supplying hydraulic fluid to the hydraulic cylinder.

The present invention addresses the problem of providing a crane capable of detecting a suspension location of a payload, in order to enable accurate positioning of a hook at the suspension location of the payload. This crane comprises: a freely derricking boom provided to a swivel; and a sub-hook block and a sub-hook suspendedly provided from the boom. The crane also comprises: a boom camera capable of imaging a payload that is to be carried by the crane; hook cameras capable of imaging the payload from different viewpoints than the boom camera; and a control device for controlling the crane. The control device acquires images obtained by imaging the payload with the boom camera and the hook cameras, runs image processing on the images, and calculates a suspension location of the payload.

A hydraulic system for controlling bleed down and retraction of a boom within a safety envelope includes a backup battery power supply, and at least a first boom lift hydraulic cylinder configured to raise and lower the boom. The first boom lift hydraulic cylinder includes a solenoid bleed valve electrically connected to the backup battery power supply. The hydraulic system also includes an input device controllable by an operator of the boom. The input device may, for instance, be used by the operator to initiate bleed down and retraction of the boom from an elevated position. To accommodate independent failsafe features of the system, the input device is configured to selectively actuate the solenoid bleed valve using electrical power supplied from the backup battery power supply.

A crane is disclosed, the crane includes detachable hydraulic cylinder including a head side oil chamber and a rod side oil chamber both to be connected to a control valve through a joint, in which a head side hydraulic detecting section and a rod side hydraulic detecting section are each provided to the hydraulic cylinder, and a connection state between the hydraulic cylinder and the control valve is determined based on a head side hydraulic pressure and a rod side hydraulic pressure in a period until a predetermined time elapses after supply of electric power to the head side hydraulic detecting section and the rod side hydraulic detecting section is started and an operation tool for hydraulic cylinder switches the control valve to a state of supplying hydraulic fluid to the hydraulic cylinder.

A linkage assembly for a machine is disclosed. The linkage assembly includes a boom and a stick pivotally coupled to a front end of the boom. The boom includes a base plate having a first portion and a second portion. The second portion is inclined at angle with respect to the first portion. The boom further includes a pair of side plates attached to the base plate, and a top plate attached to the pair of side plates. The base plate, the pair of side plates, and the top plate together define a box structure. A baffle plate is disposed within the box structure at a predefined distance from the front end of the boom. The boom further includes a mounting member attached to the base plate of the boom. The mounting member is configured to couple with a first hydraulic actuator and a second hydraulic actuator.

A crane (100) comprises a boom (110) rotatable about a pivot (120) between a crane base (130) and the boom (110) and a winch arrangement (150) mounted movable with respect to the boom (110). A load weighting element (160) is mounted between the boom (110) and the winch arrangement (150).