Abstract: A water pump assembly includes a lower housing configured for being positioned within a well. The lower housing includes a bladder therein. The bladder expands to force water within the housing into an outlet of a valve apparatus and the bladder contracts to draw water into the housing. A cylinder and piston fluidly coupled to an inlet of the valve apparatus and the inlet is fluidly coupled to the bladder. A one way valve is positioned within the valve apparatus and fluidly connects an inlet chamber including the inlet to an outlet chamber including the outlet. The one way valve allows water to flow from the outlet chamber into the inlet chamber and restricts water from flowing from the inlet chamber into the outlet chamber. An outlet conduit is fluidly coupled to the outlet of the valve apparatus to carry the water where desired.

Abstract: Embodiments relate to a multi-functional, hand-operated, modular hand pump apparatus capable of drawing in a pumping medium through an intake point, nozzle, filter cap, or combination thereof into a pump housing by means of a plunger rod assembly and discharging the pumping medium through a plurality of discharge points, wherein the entire apparatus is extendable by attachment of a plurality of extension units and can be easily assembled and disassembled without tools.

Abstract: A leverage device includes elongated body connected to a pivoting base, and a means for attaching the elongated body to the “T” handle of a pump used in filling air tanks. In use one securely connects the pivoting base to a stationary vertical surface, connects the attachment assembly to a pump, and repeatedly moves the elongated body in an up-and-down motion. This action moves the attached pump's “T” handle, thereby causing the pump's piston to move with decreased effort and increased speed over the conventional motion of pumping. In this manner a compressed air tank can be filled to approximately 3,000 psi using human power only.

Abstract: A human-powered pump assembly includes a frame and a treadle pivot attached to the frame, such that the treadle pivot defines a horizontal rotational axis. The pump assembly includes a pair of treadles coupled to the treadle pivot and a rocker pivot attached to the frame, such that the rocker pivot defines a separate horizontal rotational axis. The pump assembly includes a reciprocating rocker coupled to the rocker pivot and to the pair of treadles to constrain the motion thereof, such that the rocker pivot axis is located below the treadle pivot axis.

Abstract: A measurement fluidic channel (17) is formed at almost the center of a flow cell (1). In general, the measurement region of a measurement apparatus is set to focus on almost the center of a measurement chip. When the flow cell (1) is mounted in the measurement apparatus, the focus of the measurement region is positioned just above the measurement fluidic channel (17). The measurement apparatus can more reliably measure a sample solution flowing through the measurement fluidic channel (17). A suction pump (18) is formed in regions around the measurement fluidic channel (17). When the flow cell has the same planar shape as a conventional one, the amount of sample solution which can be supplied can be increased, compared to a conventional structure in which components are formed in line. The time during which a sample solution flows through the fluidic channel can be prolonged, the amount of sample solution can be increased, and the measurement time can also be prolonged.

Abstract: The pump horn includes a chamber that can be filled continuously and indefinitely by a push/pull slide that when pushed into the chamber forces pressurized air through an attachable member, a tube, a sound producing device, and an amplifying unit to produce a loud blast sound. The push/pull slide includes a screw in piece at the end which is secureable to the attachable member within the chamber for releasable securement of the push/pull slide. This allows compact carrying and storage.

Abstract: A high-pressure fluid is continuously generated with high efficiency without causing pulsation of pressure by reciprocally moving a piston having first, second and third chamber sections under the control of an actuator including an operating pressure source and a directional control valve. With the reciprocating motion of the piston, liquid or fluid such as gas is fed into the first, second and third chamber sections in sequence through check valves and finally discharged outside at high pressure. The actuator is operated hydraulically, mechanically or electrically.

Abstract: An air pump is provided with a motor body having an air slot to allow air to flow from the air slot to air inlets positioned in a front sealing cap of the motor body. The air inlets are aligned with air holes in a closed housing. A shaft of the motor body extends into the closed housing which houses a piston. The shaft of the motor body is connected to gearing mechanisms in the closed housing to provide reciprocating motion of the piston. The piston includes an air inlet and a valve. The reciprocating movement of the piston causes air to travel through the piston into a cylinder above the piston. The design of the pump affords a cooling function to both the motor body and cylinder while reducing the noise of the pump.

Abstract: In the present invention, a pump includes a cylinder, a plunger for compressing air in the cylinder, a reservoir formed around the cylinder so as to define a space for storing a portion of the compressed air, a valve device installed in the cylinder for permission of the compressed air from the cylinder into the reservoir and a base connected with the cylinder for stabilizing the pump. The base includes two pedals extending in opposite directions from the cylinder.

Abstract: A compact manually operated air compression device for precompressed air guns has been disclosed, wherein two operating levers, positioned on opposite sides of a cylinder, are connected to a piston rod by means of connecting links. Lightweight connection of operating levers to the cylinder provided. Configuration of the device affords adjustment position of the piston in the cylinder.

Abstract: A fluid delivery apparatus provides for controlled delivery of fluids into a fluid system. The fluid delivery apparatus can allow a defined volume of fluid to be delivered to the fluid system cleanly, minimizing fluid waste and spillage. The fluid delivery apparatus can provide a mechanical advantage allowing the fluid to be delivered easily and efficiently to a pressurized fluid system. The apparatus can have a piston and handle arrangement that can reduce wear of the apparatus.

Abstract: A vacuum pump useful in penile erection systems is provided. The vacuum pump comprises a piston in a cylinder with intake and exhaust valves. The vacuum producing outstroke is powered by a spring having sufficient force to draw a vacuum no higher than the desired upper safety limit, and the reset stroke is powered manually. The pump is constructed to provide an inherent vacuum limit by selecting a spring which, when fully compressed during a reset stroke, exerts a force against the piston which is less than the force exerted against the piston head by the differential pressure between atmospheric pressure and a preselected maximum vacuum pressure inside the cylinder. Thus, when the maximum vacuum pressure is reached, the piston is not returned for successive pumping.

Abstract: A manually operated refrigerant recovery device is disclosed that includes a piston/cylinder pump combination, wherein the piston defines opposing fluid chambers in the cylinder. A handle is attached via a connecting rod to the piston. First and second one-way check valves are provided at the pump inlet and outlet to ensure that fluid flows in only one direction through the pump. A pressure relief valve is in fluid communication with the fluid chamber opposite the pump chamber and is continuously manually adjustable between an open position and a closed position. The pressure relief valve is closed upon initial pressurization of the pump to dampen sudden upward movement of the handle and is open during pumping to facilitate manual pumping. In another embodiment, a manually operated refrigerant recovery device is disclosed which includes a piston/cylinder pump combination, wherein the piston defines opposing fluid chambers in the cylinder.

Abstract: A device for evacuating and charging refrigerant in a refrigerant circuit (64) includes a hand pump to evacuate the circuit. The pump has a pump cylinder (10), in which a pump piston (12) is movable to and fro by a piston rod (16) which has a pump handle (14) mounted thereon. The circuit is charged with refrigerant from a container (18), which extends in the longitudinal direction of the pump cylinder (10) and is fastened to the cylinder.

Abstract: A manually operated refrigerant recovery device is disclosed that includes a piston/cylinder pump combination, wherein the piston defines opposing fluid chambers in the cylinder. A handle is attached via a connecting rod to the piston. First and second one-way check valves are provided at the pump inlet and outlet to ensure the fluid flows in only one direction through the pump. A pressure relief valve is in fluid communication with the fluid chamber opposite the pump chamber and is continuously manually adjustable between an open position and a closed position. The pressure relief valve is closed upon initial pressurization of the pump to dampen sudden upward movement of the handle and is open during pumping to facilitate manual pumping. In another embodiment, a manually operated refrigerant recovery device is disclosed which includes a piston/cylinder pump combination, wherein the piston defines opposing fluid chambers in the cylinder.

Abstract: A manually operable water well pump includes a baseplate with a casing thereon, a rocker arm pivotally mounted in the casing for reciprocating movement therein, a chain on one end of the rocker arm outside the casing for reciprocating vertical movement with the rocker arm, a connector on the free end of the chain for connecting the latter to a pump rod, whereby the rod can be reciprocated in a well casing, the transmission in the casing including a pair of gears interconnected by an endless chain, a crank for rotating the smaller of the gears and a linkage between the larger of the gears and the other end of the rocker arm for reciprocating the latter, and a tank suspended from the baseplate concentric with the pump rod for mounting on a well casing to receive and discharge water from the well.

Abstract: The device of the present application, a hand held vacuum and pressure pump having an improved handle, provides a hand held pump with a handle suitable to be used by a person with a smaller hand without significant loss of stroke length or leverage. The handle having a movable arm which is compressible toward a fixed arm, at least one of the arms having an angled corner such that distal ends of the arms when not compressed are closer together than they would be without the corner, and at least one of the arms having a taper at the distal end of the arm such that the arms may compress together in a full stroke.

Abstract: A trigger operated dispenser includes a plurality of expansible chambers, with one of the chambers comprising a pumping chamber connected to be operated by the trigger, and another chamber connected to receive product from the pumping chamber and operative to expand and accumulate an amount of product for continuous discharge of the product through the nozzle, whereby continuous discharge of the product is obtained during both pressurization and intake modes of operation of the trigger operated pumping chamber.

Abstract: A trigger operated dispenser includes a plurality of chambers with movable members therein, and operable to draw material from a container, pressurize it, accumulate a quantity of material under pressure, and discharge the material to a point of use. An adjustable member communicates with the chambers for selectively obtaining either continuous or intermittent discharge of the material.

Abstract: A mechanically operable bellows for feeding anesthetic and/or life sustaining gases to a patient during a surgical procedure.

Abstract: A finger operable pump for dispensing liquid from a container in a generally continuous manner includes a pump housing having an inner pump body and an outer sealing element. The inner pump body has a liquid receiving chamber, divided into primary and secondary portions by a reciprocatable piston, and an inlet conduit to the primary chamber portion. The inner pump body further includes first and second lead passages that respectively communicate with the primary and secondary chamber portions. The outer surface of the inner pump body is recessed to form a channel interconnecting the first and second lead passages, and an air dome communicating with the channel that is designed to confine air as a pressure head above liquid flowing through the channel. The outer sealing element is shaped and sized to tightly nest about the inner pump body and seal the channel and the air dome.