A downhole pump used for a reciprocating pump system includes a barrel and a plunger. The barrel couples to a tubing string and has a standing valve. The plunger couples to a rod string and has a traveling valve. One or both of the valves can include an assembly comprising a housing, an insert, a ball, and a seat. The insert allowing for flow therethrough defines a ball stop at one end has a ball passage at the other end. The insert positions in flow passage of the housing, and one of the ends engages a shoulder in the passage. The insert is secured in the flow passage with metallic material metallurgically affixed between at least a portion of the insert and the flow passage. For example, brazing material can be brazed at the end of the insert to metallurgically affix the insert in the passage. The ball is positioned in the insert, and the seat is positioned adjacent an end of the insert. The assembly is then incorporated into components of the pump.

A piston pump assembly of an electronic controlled brake device for a vehicle includes: an inlet housing configured to accommodate a reciprocating piston and elastically support the piston; an outlet housing configured to accommodate the inlet housing and form a working chamber that allows a working fluid to be introduced from the inlet housing; an outlet ball valve accommodated in the working chamber to open and close a flow passage of the working fluid that is introduced from the inlet housing to the outlet housing; an outlet spring accommodated in the working chamber to elastically support the outlet ball valve toward the inlet housing; and a damper accommodated in the working chamber and mounted within the outlet spring to allow shape deformation while contacting the outlet ball valve. When the outlet ball valve is pushed and pressed toward an end of the working chamber, the damper generates viscous damping while discharging the accommodated working fluid into the working chamber. Accordingly, it is possible to actively reduce noise or vibration upon initial operation of the electronic controlled brake device or in a low frequency section, thereby improving ride comfort.

An electric oil pump with an one-way valve is provided, which includes a control box. The control box is provided with a communication pipe and a control board, one end of the communication pipe is connected with an oil-extracting pipe, the other end is connected with an oil outlet pipe, a pump body is arranged in the oil outlet pipe, and a bottom of the control box is rotatably installed with a threaded cap. When the oil pump is, working, the gasoline is blocked by the one-way valve and transported to the oil outlet pipe via the oil-extracting pipe during the oil delivery process, and the negative pressure in the oil drum makes the outside air enter into the oil drum through the one-way valve when the oil pumping is completed, so as to maintain the pressure balance between the inside and outside of the oil drum.

A chain saw has a fluid pump. The fluid pump has a pump rod, a pump core assembly defining a pumping channel, and a pump body. The pump core assembly has an inner pump core and an outer pump core. The pumping channel is formed at least by a first hole defined in the inner pump core and a second hole defined in the outer pump core and the first hole is in communication with the inlet and the outlet. The pump rod is arranged to do a straight reciprocating motion in the pumping channel along a first axis so as to force fluid to flow from the inlet to the outlet by passing through the first hole.

A pump module and a device for producing a fluid jet with a pump module are disclosed. In an embodiment the pump module may include a pump housing in which at least one pump piston is mounted in a reciprocatingly movable manner and is provided with at least one sealing element which during a pumping operation interacts with a cylinder. For creating such a pump module producible in a simple manner and nevertheless exhibiting the functionality necessary for the pumping operation, embodiments disclose a valve block, which receives at least one valve associated with the cylinder, wherein the cylinder is sealed against the valve block. Furthermore, a cover element may abut against the valve block on a side opposite to the cylinder and between itself and the valve block forms an inlet passage leading to the cylinder and/or an outlet passage communicating with the cylinder.

Automatic electric actuation of the pump of a liquid dispenser apparatus is provided by a stepper motor having a threaded hollow liquid-conducting tube positioned therein and configured such that motor drives the hollow tube up and down in response to supply of a plurality of electrical pulses thereto. A lower end of the hollow tube is constructed to inter-fit with a stem of the pump such that driving the hollow tube up and down creates a pumping action.

An exemplary refill unit for an dispenser includes a container for holding a liquid. The container has bottom side with a neck extending from the bottom side. A pump is connected to the neck of the container. The pump has a liquid pump portion that has a liquid pump inlet. The liquid pump inlet is located above the bottom of the container. A shroud is located over the liquid pump inlet and extends downward toward the bottom of the container. An air bleed valve is included and located in the top of the shroud.

A pneumatic reciprocating fluid pump for pumping a fluid at least one check valve assembly that includes a check valve body insert, a ball within the valve body insert, and an annular sealing ring member disposed within a seat ring receptacle. The sealing ring member has dimensions smaller than corresponding dimensions of the seat ring receptacle, such that the sealing ring member is capable of moving within the seat ring receptacle. The ball is configured to slide back and forth between a first position and a second position within the check valve body insert responsive to forward and reverse flow of fluid therethrough. In one position, the ball is seated against the sealing ring member and prevents reverse flow of the fluid through the check valve assembly, and forward flow of the fluid through the check valve assembly is enabled when the ball is in another position.

An electric priming pump device detachably couples to a centrifugal water pump on the suction side of the water pump, for priming thereof. The device comprises an enclosure and a base, wherein the enclosure contains a rotary vane peripheral bypass vacuum motor which is pressed against the base to form an air-tight seal. The device generates a vacuum for priming through use of a rotary vane peripheral bypass vacuum motor, which can remove large volumes of air quickly. An opening in the base receives a check valve fitting to protect the motor from water and slows loss of vacuum pressure after use. Additionally, a cone shaped protective cover protects components in the device and provides space for branding or advertisement.

A pump with an outer housing defining an enclosure, an inlet for admitting fluid into the outer housing and an outlet for expelling fluid from the outer housing, a piston for selectively modulating a first fluid pressure, such that the first fluid pressure is associated with a location proximate the inlet, and a member that selectively isolates a second pressure associated with a location proximate the outlet from the first fluid pressure. The pump may also include a first chamber within the outer housing for receiving fluid admitted into the pump from an ambient environment and through an inlet to the pump, a second chamber within the outer housing for receiving fluid from the first chamber, and a piston that both (i) selectively controls the flow of fluid from the first chamber to the second chamber and (ii) selectively expels the fluid from the second chamber into the ambient environment.