A pump including an inlet one-way valve; a pump chamber downstream of and in fluid communication with the inlet one-way valve; a piston slideably engaged with the pump chamber; a piston cavity within the piston and in fluid communication with the pump chamber; a liquid accumulator operable within the piston cavity; an actuator engaged with piston; and an outlet one-way valve downstream of and in fluid communication with the pump chamber.

A fluid pump system includes a housing, a motor, a fan, and a fluid conduit. The housing includes a wall having a first end and a second end, and the housing defining a first axis extending between the first end and the second end. The wall extends at least partially around the first axis and at least partially encloses a chamber. The motor is at least partially positioned within the chamber. The fan is positioned proximate the first end, and the fan generates air flow through the chamber. The fluid conduit is configured to be in fluid communication with a fluid reservoir, and at least a portion of the fluid conduit is positioned within the chamber.

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.

A pressurized infusion device and a liquid cooling system are disclosed. The pressurized infusion device includes a liquid storage tank and a pump. The liquid storage tank has a first end and a second end opposite to the first end. The first end has a first connecting structure, and the second end has a second connecting structure. The pump is connected with the first end of the liquid storage tank and has a third connecting structure, a first connecting port, a second connecting port, a third connecting port and a fourth connecting port. The third connecting structure corresponds to the first connecting structure. A pump flow channel from the first connecting port to the second connecting port is formed inside the pump, and a bypass flow channel from the third connecting port to the fourth connecting port is also formed inside the pump.

A pump assembly for generating and dispensing of particles of a solid material with or without dispensing of a fluid. The pump assembly preferably includes a fluid pump which in a cycle of operation draws the fluid through a fluid inlet and dispenses the fluid out a fluid outlet. The pump assembly carries a block of the solid material coalesced together and a rasp member, which during the cycle of operation, moves relative the rasp in engagement with the block whereby the rasp member disengages particles of the solid material from the block which particles drop under gravity downwardly adjacent the fluid outlet, for example, onto a user's hand as in the case that the fluid is a hand cleaning fluid and the solid is a solid soap.

Provided is a chemical injection system for connection to a chemical tank and a process line. The system includes a pump box configured to attach to the tank, the pump box including a body defining an interior, a pump assembly disposed within the interior of the body of the pump box, and an injection assembly configured to be fluidly coupled to the pump box. The injection assembly includes an injection lance having a flange and a stem, a first seal abutting a first side of the flange of the injection lance, and a second seal abutting a second side of the flange of the injection lance.

A fluid pump apparatus includes a multi-chamber pump mechanism, with an actuator having a nozzle portion defining a nozzle chamber that has a controlled opening through a discharge valve, which is calibrated to open in response to a fluid pressure in the nozzle chamber exceeding the threshold pressure.

A brake fluid feeding device includes a fluid container, a cap, and an inflator. The cap is assembled on the fluid container. The cap has a first hole and a second hole opened thereon. A gas inlet hose is connected to the first hole and extending outward. A fluid-supplying hose is connected to the second hole. The inflator has a gas-supplying portion for gas output. One end of the gas inlet hose is detachably connected to the gas-supplying portion. When the gas inlet hose is connected to the gas-supplying portion, the gas output from the gas-supplying portion enters into the fluid container via the gas inlet hose. Accordingly, the brake fluid feeding device has a simple structure and can be operated conveniently.

A pump for a receptacle (10), in particular a bottle intended to contain a cosmetic product. The pump (1) has a pumping chamber (8) with a variable volume defined at least partly by a deformable membrane (3). The pump (1) functioning by varying the volume of the chamber (8) by elastic deformation of the membrane (3) between an initial state in which the chamber (8) has a maximum volume and a deformed state in which the volume of the chamber (8) is minimum. The chamber (8) being provided with an inlet orifice (22) and an outlet orifice for the product. The pump (1) has a means for deforming the membrane configured to exert a pressure on the membrane (3) and a guide rod (20) passing through the membrane (3). The membrane (3) slides along the rod (20) when it undergoes said deformation.

The present invention involves a combination bucket lid and pump apparatus for pumping fluids out of a bucket having an open end, the pump mounted on the bucket lid, and the bucket lid extending over the open end of the bucket and having a circumferential clamp for clamping onto the bucket exterior and sealing the open end.