An aircraft windshield wiper system includes a wiper arm, a wiper blade coupled to a first end of the wiper arm, and an output shaft coupled to a second end of the wiper arm. The wiper blade includes a fluid dispensing system including nozzles, a fluid control unit, fluid lines, fluid source, and a user interface. The wiper blade with the fluid dispensing system is configured to dispense a variety of fluids directly from the wiper blade onto the windshield of an aircraft.

A water tank assembly including a tank body and a one-way valve is provided. The tank body is defined with a clean water cavity communicated with an external pipeline through a water inlet channel, the external pipeline is capable of transporting water to the clean water cavity. The one-way valve is arranged in the water inlet channel and has a first and a second state. During delivering clean water to the clean water cavity, the one-way valve is in the first state to allow water in the external pipeline to be delivered to the clean water cavity, and when clean water is stopped to supply to the clean water cavity, the one-way valve is changed to the second state to restrict the water in the water inlet channel flowing out, such that outflow of the clean water from the water inlet channel is blocked when the external pipeline is removed.

The invention provides a pump unit for a miniature cleaning machine, and belongs to the technical field of cleaning machines. The problem that an existing pump unit is frequently maintained is solved. The pump unit for the miniature cleaning machine comprises a motor, a pump shell, a plunger and a transmission assembly, the plunger and the transmission assembly are arranged in the pump shell, a reset spring enabling the plunger to always have the upward moving trend is arranged in the pump shell, the transmission assembly comprises a pump main shaft, an eccentric shaft and a ball bearing, one end of the pump main shaft is in transmission connection with the motor, and the other end of the pump main shaft is in transmission connection with the eccentric shaft. The other end of the pump main shaft is in transmission connection with one end of the eccentric shaft, the other end of the eccentric shaft is connected to the pump shell, the eccentric shaft is sleeved with the ball bearing, and a peripheral face of the ball bearing is attached to an upper end face of the plunger. The structure solves the problem of frequent maintenance of the pump unit.

Disclosed is a method for treating a substrate in a plurality of chambers. The substrate treating method may include performing liquid treatment on a substrate located in a chamber through a supply line for connecting a circulation line and each of the plurality of chambers while the liquid circulates in the circulation line, wherein a flow rate per unit time of the liquid flowing downstream of a valve provided in the supply line is constantly maintained at a reference flow rate, and controlling an upstream flow rate which is a flow rate per unit time of the liquid flowing upstream of the circulation line rather than the supply lines or a downstream flow rate which is a flow rate per unit time of the liquid flowing downstream of the circulation line rather than the supply lines based on a distribution flow rate which is a flow rate per unit time of the liquid flowing upstream of the valve to maintain the reference flow rate.

A pressure washer includes a pump for pressurizing a primary fluid flow, the pump including a pump inlet for receiving fluid from a common fluid source and a pump outlet for supplying a pressurized primary fluid and a jet pump including a primary fluid inlet fluidly coupled to the pump outlet, a secondary fluid inlet configured to receive fluid from the common fluid source, and a fluid outlet. In a high pressure operating mode, all of the pressurized primary fluid flows through the jet pump and exits through the fluid outlet of the jet pump. In a high flow operating mode, all the pressurized primary fluid flows through the jet pump and entrains a secondary fluid supplied through the secondary fluid inlet from the common fluid source so that the secondary fluid also flows through the jet pump, resulting in a combined fluid flow of the primary fluid and the secondary fluid that exits through the fluid outlet of the jet pump.

A paint brush cleaning system includes a housing and a paint brush cleaner attached to the housing. The housing contains solvent that helps clean a paint brush. The paint brush cleaner rotates a wire brush against the bristles of the paint brush and actuates a pump to eject solvent drawn from the housing as the paint brush is moved in translation. The wire brush is coupled to a retractable cord, which rotates the wire brush. A holder is simultaneously coupled to the retractable cord and the pump. When force is exerted on the holder, the retractable cord rotates the wire brush and the pump ejects solvent. A user can insert a paint brush handle through the holder, thus actuating the pump and rotating the wire brush by applying force to the handle. The housing attaches to a user's belt, providing easy access to the paint brush cleaning system.

The present invention provides a pump for supplying a liquid. The pump comprises: a tube member having a hose communicating with a chemical liquid inlet and a chemical liquid outlet, and a cylindrical drum provided to wind the hose, and configured to discharge a chemical liquid through a volume change caused by contraction of the hose wound around the drum; and a driver configured to provide a rotational force such that the hose is wound around the drum.

The present invention refers to a device for the discharge of a pressurised liquid comprising: a liquid intake section (2400), a liquid discharge lance (2300), a pump (2200), which can be connected to a motor (2100), the pump having an inlet connected to the intake section and an outlet connected to the discharge lance, where the discharge lance and the pump are connected by a connection (2800, 2801, 2802, 2803, 2804), with at most three rotational degrees of freedom and/or one translational degree of freedom.

In an embodiment, a pump assembly may include a mounting structure and a pump mechanism and a starter motor coupled to the mounting structure. The pump mechanism may include an input shaft configured to be rotatably coupled with an output shaft of a prime mover engine. The starter motor may be coupled with the input shaft of the pump mechanism for rotatably driving the input shaft of the pump mechanism.

An example cleaning system includes an engine, a high-pressure pump, and an electromagnetic clutch assembly. The electromagnetic clutch assembly selectively couples the engine to the high-pressure pump such that actuation of the electromagnetic clutch assembly controls a supply of power from the engine to the high-pressure pump. An example electromagnetic clutch assembly is also disclosed.