Abstract: A pump dispenser where the pump assemblies does not require disassembly to be recycled in current recycling streams. The pump assembly can include a plastic spring that does not lose stiffness over time and does not interact with the liquid product.

Abstract: A wearable fluid-dispensing apparatus that includes a flexible wristband coupled to and surrounding a wrist-arm area of a user, with the wristband having a frame disposed along an outer surface of the wearable wristband and at a ventral side of the user's wrist, an enclosed cartridge coupled to the frame for housing a fluid therein, and a fluid transfer conduit disposed within the enclosed cartridge for transporting the fluid from the enclosed cartridge to a nozzle port on a finger-activatable pump assembly coupled to the frame. The pump assembly defines a nozzle port disposed above a top end of the wristband and angled toward the user's palm, defining a fluid extraction passageway fluidly coupled to the nozzle port and the fluid transfer conduit, and operably configured to translate downwardly toward the fluid extraction passageway fluidly to generate a vacuum therein and emit the fluid on the user's inner hand.

Abstract: The present disclosure relates to a system and method for pumping a feedstock slurry through a device. The system includes a pressure pump, a first sensor, a second sensor, a controller, and a control valve. The pressure pump includes a plunger configured to pressurize the slurry to a first pressure prior to the slurry entering the device. The first sensor is configured to sense a second pressure of the slurry entering the device. The second sensor is configured to sense the position of the plunger. The controller is configured to determine a change of position of the plunger based on the sensed position of the plunger and to control the movement of the plunger by setting a plunger mode based on the second pressure of the slurry and the change of position of the plunger. The control valve is configured to control the flow rate of the slurry through the device.

Abstract: A reciprocating compressor includes: a low-pressure stage compression part for compressing low-pressure working gas supplied from a supply source; two high-pressure stage compression parts for compressing the working gas compressed by the low-pressure stage compression part at two stages; and a crank mechanism for driving the low-pressure stage compression part and the high-pressure stage compression parts. The two high-pressure stage compression parts each have a plunger and a cylinder and are arranged on both sides of the crank mechanism in such a way as to extend coaxially opposite to each other. The low-pressure stage compression part has a piston and a cylinder and is located in the middle of the two high-pressure stage compression parts. The crank mechanism, the low-pressure stage compression part, and the two high-pressure stage compression parts are substantially located in the same plane.

Abstract: A two stage reciprocating compressor includes a casing. A first compressing unit is disposed in the casing and includes a first piston and a first cylinder, the first compressing unit being driven by a reciprocating motor to linearly reciprocate the first piston in the first cylinder to suck in and compress gas. A second compressing unit is disposed in the casing and includes a second piston and a second cylinder, the second compressing unit being driven by vibration of the first compressing unit to linearly reciprocate the second piston in the second cylinder to suck in and compress gas. A vibration transfer member transfers the vibration from the first compressing unit to the second compressing unit. The first and second compressing units extend in parallel and face in the same direction, the second compressing unit being located adjacent to a suction passage of the first compressing unit.

Abstract: A fuel injection pump has a stepped piston operatively disposed in a stepped bore so as to define a first pump work chamber and a second pump work chamber. A constant fuel injection quantity (h.sub.FE) is pumped to the second work chamber per pump piston stroke, and a variable fuel injection quantity is pumped out of the first pump work chamber to a common distributor groove which actuates delivery of the fuel to individual injection lines.

Abstract: An air compressor with a cylinder (1) has a stepped piston (4) movably disposed therein which performs compression in both stroke directions to provide two-stage compression. Each compression stage is associated with at least one inlet and outlet valve (34, 36 or 35, 37), whereby one outlet opening (22) of a lower compression stage is connected with an inlet opening (20) of a higher compression stage. All valves (34-37) are disposed on the upper side of the compressor in the vicinity of the cylinder head (13; 30). The compressor has few individual parts and the valves are easily accessible for maintenance.

Abstract: A distributor-type fuel injection pump for an internal combustion engine wherein the plunger has first and second portions with different diameters from each other, defining first and second pump working chambers, respectively. A communication passageway is arranged for communicating the second pump working chamber with fuel delivery passageways leading to respective fuel injection valves of the engine. A drain passageway is arranged for communicating the communication passageway with a zone under a lower pressure of the pump, and is selectively closed and opened by a selector valve. An electronic control unit is responsive to operating conditions of the engine for driving the selector valve to selectively assume closed and open positions. Fuel is pressure delivered to the fuel injection valves from one or both of the first and second pump working chambers, depending upon whether the selector valve assumes the closed position or the open position.

Abstract: A hydraulically powered compressor has infinitely variable capacity control through use of a variable displacement hydraulic pump, and a hydraulic control and power system provides the infinitely variable capacity control with a proportionate change in required power. Components may be mounted in an air duct.

Abstract: An ink liquid supply system for an ink jet system printer comprising an ink liquid reservoir for containing ink liquid therein, and a constant flow rate pump for supplying the ink liquid to a nozzle. The constant flow rate pump comprises a first chamber for introducing an ink liquid collected by a beam gutter of the ink jet system printer and for returning the ink liquid to the ink liquid reservoir. The constant flow rate pump further comprises a second chamber for introducing the ink liquid from the ink liquid reservoir and for developing the ink liquid to the nozzle. The first and second chambers include a coaxial piston disposed therein for varying the pressure created in the first and second chambers.

Abstract: A grease gun is fed from a constant supply under pressure. The gun has a hand-pumped lever for delivering shots of grease either at high pressure and low volume or low pressure and high volume depending on a changeover valve. Air bleeds from the gun through the nozzle by a single pump of the lever. The lever causes a pushrod to open a one way valve allowing grease to travel entirely through the gun to the nozzle.In another version the pushrod is replaced by a cone valve. Both versions are for single handed operation.

Abstract: A four-stage gas compressor including: a double-acting piston operable by pressurized oil and provided with first and second hollow opposed piston rods the first of which is connected to a first-stage piston and the second of which is connected to a second-stage piston; said first and second-stage pistons being arranged to slide in first and second jackets respectively and being a sliding fit upon first and second cylindrical bodies respectively; said first and second cylindrical bodies respectively being fixed to first and second opposed heads; a first axial suction and delivery duct leading to an end face of said first cylindrical body, a third stage chamber being defined between said end face and one face of the double-acting piston; and a second axial suction and delivery duct leading to an end face of said second cylindrical body, a fourth stage chamber being defined between said end face of said second cylindrical body and the other face of the double-acting piston.

Abstract: Means for capturing the vertical energy of waves and transferring this energy to air compression is disclosed. A compression shell chamber is affixed to the hull of a boat. Housed within the compression shell chamber is a float whose size is equivalent to the inner dimensions of the compression shell chamber. When a swell moves the float vertically towards the top of the compression shell chamber, air is compressed and forced into a compressed air exhaust line.The compressed air is utilized as it is forced into the compressed air exhaust feed line to a receptacle. The concept can be used to pump either water or air.

Abstract: Displacement slurry pump equipped with known piston-rod drive, in which on a piston rod expediently three pistons are arranged at a distance of at least one stroke length, they are a liquid piston moving the auxiliary liquid free of solid matter, and on both sides thereof a slurry piston each moving on one side the slurry, on the other side, however, the auxiliary liquid. The liquid piston fits sealed to the liquid cylinder provided with liquid suction valves, whereas the two slurry pistons fit by slot to the slurry cylinders provided with slurry suction valves and slurry delivery valves. The effective section of the liquid cylinder is larger than the effective section of a slurry cylinder each. The slurry pump may be of single-operation or of double-operation, of one-cylinder or two-cylinder or three-cylinder construction.

Abstract: A fluid dispenser pump having a piston extending from one end of a cylinder with resilient means urging the piston from the cylinder to its extended position for manual movement into the cylinder to its retracted position, said piston and cylinder being elastomeric plastic members, with complementary cylindrical walls forming a sequence of chambers. An inlet chamber communicates with a fluid supply. An auxiliary pressure chamber is normally sealed from the inlet chamber, but it communicates with the inlet chamber whenever the piston is at its fully extended position. An operating chamber communicates with the auxiliary pressure chamber and a first check valve means between the chamber permits flow from the auxiliary pressure chamber to the working chamber, but prevents a reversal of such flow. A discharge chamber communicates with the working chamber and a second check valve means between the chambers permits flow from the working chamber to the discharge chamber but prevents a reversal of such flow.