A piston rod and piston head are the driven components within a pump. An upstream end of the piston rod is attached within an aperture of the piston head. At least one flute extends between the upstream end of the piston rod and the aperture, and the at least one flute is configured to provide a flowpath for a fluid, such as paint, to flow downstream of the piston head and piston rod. The flutes facilitate a smooth downstream flow of the fluid, thereby reducing hydraulic resistance and reducing wear caused by the fluid.

A piston is the driven component within a pump. The piston is driven along a longitudinal axis to pump a fluid through the pump. The fluid flows through the piston between an upstream end of the pump and a downstream end of the pump. The piston outputs the fluid into the downstream end of the pump at a vector offset from the longitudinal axis, thereby inducing rotation of the piston throughout the pumping process. Rotating the piston encourages even wear on various components within the pump, such as sealing rings surrounding the piston, thereby increasing the lifespan of the components and increasing the efficiency of the pump.

A striper can apply a polymer-based marking material comprised of a mixture of a material solution and a catalyst. The material solution and catalyst are mixed according to a desired ratio. A first pump drives the material solution and a second pump is slaved to the first pump and drives the catalyst. The second pump includes dual check valves within its piston, thereby ensuring that the second pump drives fluid during both its upstroke and its downstroke to maintain the desired ratio.

A reciprocating pump, in particular a hydraulic pump of a slip-controlled vehicle braking system, includes a step piston, a differential pressure valve, and a pump outlet. The step piston includes a piston step that delimits a stepped space which is in communication with the pump outlet via the differential pressure valve. The piston step is configured such that the step space undergoes suction and displacement in a direction opposite to a displacement space, and in smaller quantities than suction and displacement in the displacement space, such that brake fluid volume flow in the pump outlet is evened out, and such that pressure pulsations are inhibited.

A well pump assembly has a barrel, a standing valve at an upper end of a standing valve chamber, and a plunger. A travelling valve admits well fluid into the barrel during a fill stroke. The travelling valve closes during a power stroke so that the plunger pushes well fluid from the barrel into the standing valve chamber. A gas release port extends from the standing valve chamber to the exterior of the pump assembly. A check valve in the gas release port has an outward flow blocking position for blocking liquid well fluid in the standing valve chamber from exiting through the gas release port while the plunger is in the power stroke. The cheek valve has a gas release position that enables gas present in the standing valve chamber to flow out the gas release port while the plunger is in the power stroke.

There is provided an airless paint spray pump wherein the pump is a double acting piston pump having an inlet communicating with a source of paint, a motor for driving the pump, a pressure controller for controlling the pressure of the pressurized paint delivered by the pump, and a filter for filtering the paint delivered by the pump. The pump includes features which increase the accessibility of the components thereof, prevent the incorrect installation of the seal packings in the pump cylinder, and allow the assembly of the piston in the pump cylinder properly aligned with the cylinder so as not to damage the seal packings therein.

A piston is the driven component within a pump. The piston is driven along a longitudinal axis to pump a fluid through the pump. The fluid flows through the piston between an upstream end of the pump and a downstream end of the pump. The piston outputs the fluid into the downstream end of the pump at a vector offset from the longitudinal axis, thereby inducing rotation of the piston throughout the pumping process. Rotating the piston encourages even wear on various components within the pump, such as sealing rings surrounding the piston, thereby increasing the lifespan of the components and increasing the efficiency of the pump.

An injection assembly (100) configured to supply an additive from a reservoir (12) to a fluid in a pipe (1) comprises: a pipe portion (3) and an injection pump comprising: an linear motor (21) comprising a stator (4) and an armature (5) reciprocatingly driven by the stator (4), a pump portion (23) comprising an additive inlet chamber (11), wherein a piston (10) coupled to the armature (5) is configured to reciprocate in said inlet chamber (11), thereby alternatingly compressing and decompressing a volume of said inlet chamber (11), an additive outlet chamber (24) in fluid communication with the pipe portion (23), and a bypass channel (25) between inlet and outlet chambers;

Systems and methods provided herein relate to a pump system. The pump system includes a pump disposed within a well, an actuator operable to move a rod including a surface end coupled to the actuator and a downhole end coupled to the pump, and a controller. The controller is configured to identify a first impulse response and a second impulse response associated with the pump system based on a first model of the pump system. The controller is further configured to generate a second model of the pump system based on the first impulse response and the second impulse response. The controller is further configured to operate the pump system based on the second model.

Present disclosure relates to an E-liquid supply mechanism and an electronic cigarette having the same. The E-liquid supply mechanism includes a stationary portion, a movable portion, and an E-liquid bottle. Stationary portion includes an E-liquid bottle lid, an E-liquid supply mechanism body, and an E-liquid supply intake tube. E-liquid supply mechanism body is attached to E-liquid bottle lid. E-liquid supply intake tube is attached to a low end of E-liquid supply mechanism body. Movable portion is positioned inside of E-liquid supply mechanism body and includes a press button, a first E-liquid tube, a supply piston, a second E-liquid tube, a spring, and a steel ball. First E-liquid tube is attached to the press button. The supply piston is attached to the first E-liquid tube. The second E-liquid tube is attached to the supply piston. The spring positioned under the second E-liquid tube, and the steel ball positioned under the spring.