A paint sprayer includes an end bell, a motor connected to the end bell, a pump drive connected to the end bell, a pair of protrusions attached to an extending from the end bell such that each protrusion is cantilevered from the end bell, and a pump assembly comprising a pair of mounting holes and containing a piston. The pair of mounting holes is adapted to receive and slide onto the pair of protrusions to mount the pump assembly on the end bell as well as slide off of the pair of protrusions to remove the pump assembly from the end bell. The pump drive is configured to covert rotational motion output by the motor to reciprocal motion. The pump assembly is configured to pump paint when reciprocated by the pump drive while mounted on the end bell.

A spray system for spraying a fluid, the spray system including a tank for holding the fluid; and a sprayer including a fluid conductor, a fluid mover, at least one first nozzle and a second nozzle, the fluid conductor including an inner diameter, a first end configured to be connected to the tank, a second end configured to be selectively connected to one of the at least one first nozzle and a second nozzle, wherein the second nozzle including a through opening at least about the same size as the inner diameter, wherein the fluid mover is configured to draw the fluid from the tank through one of the at least one first nozzle to create a spray of the fluid and the second nozzle to return at least a portion of the fluid to a storage tank.

A handheld computer device is configured to selectively receive a plurality of fluid output values from a paint sprayer and configured to operate in an accessible mode in which the handheld computer device is in a first location where wireless connectivity, via a continuous or near continuous communication path, to at least one of a network server or the paint sprayer is accessible or operate in an inaccessible mode in which the handheld computer device is in a second location out of range of the continuous or near continuous communication path to at least one of the network server or the paint sprayer.

A vehicle cleaner (1) includes: a cylinder (2) provided in an opening (101) formed in a part of a vehicle body panel (100) of a vehicle; a piston (3) supported to be movable forward and backward with respect to the cylinder (2); a nozzle holder (10) provided near the front end of the piston (3); a nozzle (4) which is supported by the nozzle holder (10) and which, with the piston (3) protruding from the opening (101), sprays a cleaning liquid onto a vehicle item to be cleaned; and a nozzle cover (20) which is provided on the front end of the nozzle holder (10) and which, with the piston (3) having been pulled back into the cylinder (2), closes the opening (101). The nozzle cover (20) has a cover part (21) for closing the opening (101), and an engagement part (30) that protrudes from the cover part (21) toward the piston (3) and is engaged with the nozzle holder (10). One surface of the engagement part (30) is provided with a recessed part (31) for lance engagement, and another surface thereof is provided with contact ribs (34, 34). One surface of the nozzle holder (10) is provided with a protruding part (13a) that engages with the recessed part (31), and another surface thereof is provided with a first contacted rib (16a) with which the contact ribs (34, 34) come into contact.

A fluid dispensing device includes a housing and a reciprocating piston fluid pump coupled to the housing. The reciprocating piston fluid pump includes a piston. The piston is configured to pressurize at least one pumping chamber. A motor is connected to the reciprocating piston fluid pump to actuate the piston. A spray tip connected to an outlet of the at least one pumping chamber.

A piston rod (27) for a spray fluid pump includes an interior pumping chamber (40), one or more channels (50) formed on the exterior of the piston rod, and one or more side bores (32) extending through the piston rod and in fluid communication with the interior piston chamber and one or more channels. The one or more channels (50) extend at least partially axially and are open along a length of the channel. The one or more channels are angled offset with respect to the reciprocation axis for imparting a rotational moment on the piston rod to cause rotation of the piston rod during reciprocation of the piston rod. A spray fluid pump comprising such piston rod is also disclosed.

An animal behavior modification device is provided. The device includes a sound, vibration or motion sensor that is configured to generate electrical signals in response to an occurrence. The device may include a filter, which is tuned to recognize a dog barking event, and generate an electrical signal in response to recognizing an input signal indicative of a dog's bark. The device further includes a canister that holds a deterrent fluid under pressure. The device additionally comprises a motor module configured to rotate a shaft in response to the electrical signal from the filter. The canister has a spray nozzle for releasing fluid that affects the dog's senses. In response to rotating the shaft, the spray nozzle is depressed. A method of modifying the behavior of an animal using the device is also provided herein.

Disclosed herein are nano-encapsulated compositions and systems and methods of preparing the same. The compositions may be obtained through co-axial electrospraying with pulsating voltage. The nano-encapsulated composition exhibit improved pharmacokinetic properties. Various embodiments include systems and methods that apply a constant voltage and/or a pulsating voltage at a frequency to a plate having co-axial outlets through which a core solution and capsule solution flow. In some implementations, the pulsating voltage fluctuates between a minimum pulsating voltage and a maximum pulsating voltage, wherein the minimum pulsating voltage is 0 KV or greater and the maximum pulsating voltage is greater than 0 KV and the minimum pulsating voltage. The constant voltage is greater than 0 KV, and a total maximum applied voltage to the plate is the sum of the maximum pulsating voltage and the constant voltage.

A foreign matter removal device (1) is configured to remove foreign matters on a lens (101) of an in-vehicle camera (100) attached to a vehicle so that the lens (101) of the in-vehicle camera (100) is exposed toward an outside of a body panel of the vehicle. The foreign matter removal device includes a single-cylinder type reciprocating pump (5) configured to generate high-pressure air and a nozzle (22) configured to inject the high-pressure air toward the lens (101). A volume of an internal space of the pump is 10 cm.sup.3 or less. Exhaust time (t1) per cycle required for exhausting the air in the internal space is 0.03 seconds or less.

A sprayer for spraying fluid includes a pump, a motor that drives the pump, a drive cycle indicator, a wireless module configured to send and receive information, and control circuitry. The drive cycle indicator outputs an indication of cycle status of the pump. The control circuitry is configured to receive the plurality of cycle status indications of the pump, determine a plurality of output values representing paint spray fluid output volume over a plurality of time windows based on the plurality of cycle status indications of the pump, store the plurality of output values in memory, and cause the wireless module to transmit one or more of the stored plurality of output values externally from the sprayer.