Abstract: A heater pump includes a motor and a pump assembly. The pump assembly includes a pump housing having an inlet and an outlet. An impeller and a heater are disposed within the pump housing. The heater includes a heater housing having an inner wall, an outer wall, a lower wall and an upper wall forming a heating chamber. A heating element is disposed within the heating chamber. The inner wall defines an inlet channel connecting the impeller with the inlet of the water pump. Water flowing through the pump is heated by contact with the heater housing and/or the heating element.

Abstract: A heater pump includes a motor and a pump assembly. The pump assembly includes a pump housing having an inlet and an outlet. An impeller and a heater are disposed within the pump housing. The heater includes a heater housing having an inner wall, an outer wall, a lower wall and an upper wall forming a heating chamber. A heating element is disposed within the heating chamber. The inner wall defines an inlet channel connecting the impeller with the inlet of the water pump. Water flowing through the pump is heated by contact with the heater housing and/or the heating element.

Abstract: A brush direct current motor has a stator with a plurality of coils that correspond to a number of stator windings, a rotor with a number of poles, and a commutator. The commutator is connected to a first terminal of a direct current power source to convert the power into N phase alternating current. One end of each stator winding is connected to a respective phase of the alternating current via a brush and the other ends of the stator windings are connected to the second terminal of the direct current power source.

Abstract: A brush direct current motor has a stator with a plurality of coils that correspond to a number of stator windings, a rotor with a number of poles, and a commutator. The commutator is connected to a first terminal of a direct current power source to convert the power into N phase alternating current. One end of each stator winding is connected to a respective phase of the alternating current via a brush and the other ends of the stator windings are connected to the second terminal of the direct current power source.

Abstract: A bending device includes a bendable unit which has a bendable body extending in a direction and a soft pipe extending in the same direction and fixed to the bendable body. The soft pipe is stretchable in said direction relative to the bendable body in response to changes of pressure inside the soft pipe, which results in the bendable body and the soft pipe bending.