A rotator arrangement (10) comprising a motor (11) with a stator (13) and a rotor (12) arranged inside the stator (13) to rotate with respect to said stator (13) around an axial axis (A). The rotator arrangement (10) comprises a rotor attachment piece (15) connected to the rotor and a stator attachment piece (16) connected to the stator, wherein one of the rotor attachment piece (15) and stator attachment piece (16) is arranged to be attached to a crane arm or the like, and the other is arranged to be attached to a tool implement. An angle meter (17) is arranged to continuously monitor the rotation of the rotor (12) with respect to the stator (13), wherein the angle meter (17) comprises a stator part (18) that is arranged to rotate with the stator (13) a rotor part (19) that is arranged to rotate with the rotor (14), and wherein the angle meter (17) is arranged along the axial axis (A).

A rotator arrangement (10) comprising a motor (11) with a stator (13) and a rotor (12) arranged inside the stator (13) to rotate with respect to said stator (13) around an axial axis (A). The rotator arrangement (10) comprises a rotor attachment piece (15) connected to the rotor and a stator attachment piece (16) connected to the stator, wherein one of the rotor attachment piece (15) and stator attachment piece (16) is arranged to be attached to a crane arm or the like, and the other is arranged to be attached to a tool implement. An angle meter (17) is arranged to continuously monitor the rotation of the rotor (12) with respect to the stator (13), wherein the angle meter (17) comprises a stator part (18) that is arranged to rotate with the stator (13) a rotor part (19) that is arranged to rotate with the rotor (14), and wherein the angle meter (17) is arranged along the axial axis (A).

An impeller pump has a pump chamber with an inlet and an outlet, and an impeller in the pump chamber. An auxiliary outlet out of the pump chamber together with an auxiliary outlet flap is provided, the auxiliary outlet flap having a closed position and at least one open position and being rotatable or movable between the positions. In the closed position, the auxiliary outlet flap closes off the auxiliary outlet and, in each of the open positions, the auxiliary outlet flap at least partially opens the auxiliary outlet. The auxiliary outlet flap has an actuator and is subjected to force loading by the actuator, such that the auxiliary outlet flap is moved automatically from the closed position into one of the open positions if the auxiliary outlet flap is free from fluid flow in a direction of rotation of the impeller.

The present invention is directed to a load bearing direct-drive system for driving a fan in a cooling system such as a wet-cooling tower, air-cooled heat exchanger, HVAC system, hybrid cooling tower, mechanical tower or chiller system. The present invention includes a variable process control system that is based on the integration of key features and characteristics such as tower thermal performance, fan speed and airflow, motor torque, fan pitch, fan speed, fan aerodynamic properties, and pump flow. The variable process control system processes feedback signals from multiple locations in order to control a high torque, low variable speed, load bearing motor to drive the fan.

A system for converting a ceiling fan having blades into an air cleaning and air freshening device which fit snugly over the blades of a ceiling fan, their shape conforming to that of the blade structured and arranged to disperse a fresh and pleasing scent into a room with the fan in motion, and attract and capture dust and other allergens, while facilitating the cleaning of the fan blades when removed.

Circuits for controlling an impeller in a fluid flow distribution system to achieve a target fluid flow are disclosed. The circuit to output a signal representative of a speed value (N.sub.T) of the impeller derived from a stored power consumption value (W.sub.i) and speed value (N.sub.i) pairs to achieve the target fluid flow. The circuit to receive a power signal representative of an input power consumption value (W) of the impeller at the speed value (N.sub.T) to input fluid to the fluid flow distribution system and to compare the value (W) represented by a power signal for the speed value (N.sub.T) with the stored value (W.sub.i) and impeller speed value (N.sub.i) pairs to determine a least difference impeller speed value (N.sub.L) of the stored pair comprising a least difference between the value (W) and the value (W.sub.i). The circuit to output a speed signal representative of value (N.sub.L).

The present invention relates to a blower fan, comprising two side walls, an air duct, a handle, a motor, a wind wheel and a motor control assembly; the two side walls are arranged in parallel with each other; the air duct is arranged between the two side walls in a rotatable way; the handle is mounted on the air duct; the motor and the wind wheel are both mounted in the air duct; the motor control assembly is arranged on a side wall close to the motor and is electrically connected with the motor, installation position of the motor control assembly with respect to the side wall being at an inner side of the side wall. According to the present invention, the air blowing angle is adjustable due to the rotation of the air duct, achieving a better drying effect. Additionally, the structure of the present invention is compact, attractive in appearance and durable.

A heat dissipating device includes a bottom assembly, a first light guide positioned on the bottom assembly, a first light assembly positioned on the first light guide, and an outer cover positioned on the bottom assembly and at least partially enclosing the bottom assembly, the first light guide, and the first light assembly. The outer cover defines a first opening on a top surface thereof, at least a portion of the first light guide is received in the first opening, and light from the first light assembly is emitted from the heat dissipating device through the exposed portion of the first light guide.

The present invention relates to a BOV valve using differential pressure of air and, more particularly, to a BOV valve that is operated using differential pressure of air.

The present invention relates to a BOV valve using differential pressure of air and, more particularly, to a BOV valve that is operated using differential pressure of air.