Abstract: A system and method for concentrating a slurry is disclosed. A preferred embodiment comprises a filter that is used to filter a slurry into a concentrate and a permeate. A portion of the permeate is used in a backflow operation of the filter once a pressure differential of 0.8 bar is obtained from the filter inlet to the permeate outlet of the filter.

Abstract: A system and method for concentrating a slurry is disclosed. A preferred embodiment comprises a filter that is used to filter a slurry into a concentrate and a permeate. A portion of the permeate is used in a backflow operation of the filter once a pressure differential of 0.8 bar is obtained from the filter inlet to the permeate outlet of the filter.

Abstract: The creative product relating to a “power bicycle's dual-drive device”, which contains a pedal-driven part, a motor-driven part, a gearing mechanism, and a controller; the electric motor axis of the motor-driven part has a drive-gear and the relay-gear, the first and second transmission member connect the gear plate with the relay-gear and the drive gear with the transmission gear disc respectively, through the dual-drive device, either alone or mixed selection; by the driven pedal to control the electric driven motor and to drive the driven gear for operation, to produce large torque output in order to drive the transmission gear disc, to correspond with the transmission to control the second transmission member to the transmission gear disc of different outside diameters for changing the gear, for satisfying the riders to choice their own mode of laborsaving or exercise demand in different terrains.

Abstract: An improvement to electrical bicycles is provided. The bicycle is improved by directly securing a one-way driving assembly to the left side of the driving wheel's hub and forming a one-piece unit with the hub. By having an inserting body protruding from a rotating body, a large bevel gear wheel of the driving assembly is joined with the rotating body. An output bevel gear wheel of a D.C. motor is engaged with the large bevel gear wheel to directly drive the hub in a forward direction. The hub may also be pedal driven so the function of the pedals is not changed.

Abstract: An electrical bicycle comprises a frame body, a battery and a rotation controller. Characterized in that a driving mechanism is disposed at the rear triangle supporter and one side of the spindle. The transmission collar and fly-wheel are disposed at both ends of the spindle respectively. The transmission collar is rotated by means of the DC motor, the first and second bevel pinions. The output of the DC motor is reduced by the combination of the first and second bevel pinions. No chain is needed, consequently the defects inherited thereof are omitted. This electrical bicycle is free from noise and pollutant emissions. The driving mechanism can be switched on easily as necessary.