Abstract: A hand pump includes a receptacle extended upwardly from a base, a piston slidably engaged in the receptacle for generating a pressurized air, a check valve engaged between the receptacle and a tubular member for limiting the flow of the pressurized air, a control valve device includes a barrel connected to the tubular member and connected to a pressure gauge which displays a pressure in the barrel, the barrel includes an outlet port coupled to a hose, an air storage tank includes a mouth connected to the barrel for allowing the pressurized air to flow between the barrel and the air storage tank, and a valve member is engaged in the barrel and includes a pathway for either aligning with or offsetting from the outlet port of the barrel.

Abstract: A hand pump includes a receptacle extended upwardly from a base, a piston slidably engaged in the receptacle for generating a pressurized air, a check valve engaged between the receptacle and a tubular member for limiting the flow of the pressurized air, a cover attached to the receptacle and having an arm, a manifold having an inlet port connected to the tubular member for receiving the pressurized air from the tubular member, the manifold includes a stud engaged through the hole of the arm, a pressure gauge is connected to the manifold for displaying a pressure in the manifold, and a hose is coupled to the stud of the manifold for receiving the pressurized air from the manifold, and a nozzle is attached to the hose.

Abstract: An air pump device includes an air generating mechanism, an air tube unit, an air cylinder, and a control mechanism. The air cylinder has an air-receiving space and an air channel being in fluid communication, and a valve unit. The control mechanism includes a manifold seat interconnecting a linking unit of the air generating mechanism and the air tube unit, and a control unit convertible between an air-storing position, where air advanced from the linking unit into the manifold seat is limited to flow into the air channel, and the valve unit is opened to allow entrance of the air into the air-receiving space, and an air-pumping position, where air advanced from the linking unit into the manifold seat is limited to flow into the air tube unit.

Abstract: A hand pump includes a receptacle extended upwardly from a base, a housing attached to the base and having a port connected to a pressure gauge, a hose coupled to the housing and having a nozzle for inflating tires or objects, a sleeve slidably engaged onto the receptacle, and a check valve engaged in the receptacle for controlling the pressurized air to flow only from the sleeve into the receptacle and for preventing the pressurized air from flowing backward from the receptacle into the sleeve in order to generate the pressurized air in the receptacle, and for allowing the receptacle to store the pressurized air when required. A control valve device controls the pressurized air to flow out of the housing.

Abstract: A cooling system employs a single-acting positive displacement bellows pump to transfer a cryogenic liquid such as liquid nitrogen from a storage dewar to a heat exchanger coupled to a measurement chamber of an instrument, wherein cooling takes place by vaporizing the liquid. Preferably, the capacity of the pump is greater than the maximum cooling requirement of the instrument, wherein both vapor resulting from vaporizing of the cryogenic liquid circulated through the heat exchanger and liquid that does not vaporize when circulated through the heat exchanger are returned to the storage dewar, wherein the vapor is subsequently vented from the dewar. Preferably, with the aid of a weir in a return line, the level of liquid in the heat exchanger is maintained full and constant, and the cooling demands are automatically met without the need for other control of the flow rate or level of the liquid.

Abstract: The present invention is to provide a thermo-valve which can be operated with no unnecessary work to fill fluid easily and without fail into a circuit having the fluid flow therethrough at the time of a high temperature range.

Abstract: A pump having adjustable pumping pressures includes a tube, first and second chambers and a channel extending from the first end to the second end of the tube, and an orifice extending through the tube and opening to the channel. A base connected to the second end of the tube includes a first passage opening to the first and second chambers and a second passage opening to the first passage and the channel. A switching device includes a rod disposed in the channel and a shaft received in the orifice for selectively moving the rod to a first position for permitting air flow through the second passage to the channel and a second position for preventing air flow through the second passage to the channel.

Abstract: An air pump, including: two cylinders, a big one and a small one, which are telescopically fitted to each other. A head connects with the outlet end of the small cylinder. A pressure relief valve connects with the outlet end of the big cylinder. A first piston is fixed at the inlet end of the small cylinder and placed in the big cylinder. A first pipe, has one end fixed on the outlet end of the big cylinder, and the other passes through the first piston and placed inside the small cylinder. A first chamber with a passage communicating with the first pipe forms therein between the inside wall of the big cylinder and the outside wall of the first pipe. A second pipe, one end fixed at the outlet end of the small cylinder and communicating with the head in one-way air admission, has the other fit into the first pipe in a telescopicing way and communicating with it. A second piston, which is placed inside the small cylinder, fixes at the other end of the first pipe and the second pipe goes through it.

Abstract: An air pump, including: two cylinders, a big one and a small one, is fitted to each other by a contractible way. A head connects with the out end of the small cylinder. A pressure relief valve connects with the out end of the big cylinder. A first piston is fixed at the in end of the small cylinder and placed in the big cylinder. A first pipe, one end fixes on the out end of the big cylinder, and the other passes through the first piston and places inside the small cylinder. A first chamber with a passage communicating with the first pipe forms therein between the inside wall of the big cylinder and the outside wall of the first pipe. A second pipe, one end fixes at the out end of the small cylinder and communicates with the head in one-way air admission and the other fits into the first pipe by contractible way and communicates with it. A second piston, which is placed inside the small cylinder, fixes at the other end of the first pipe and the second pipe goes through it.

Abstract: An engine having at least one displacer cylinder in which a liquid, in particular an ionic liquid, is arranged and which can be connected to a feed passage and a discharge passage for a medium, is disclosed. The liquid is operatively connected to a displacer device. The displacer cylinder is arranged in a cylindrical drum, rotatably mounted about an axis of rotation, at an angle to the axis of rotation of the cylindrical drum. In an embodiment, the displacer cylinder is arranged perpendicularly to the axis of rotation of the cylindrical drum, and the displacer cylinder is designed as a radial bore arranged in the cylindrical drum.

Abstract: A pump includes a base, a pumping set, a first joint, a gauge set, a second joint and a nozzle. The base includes a socket. The gauge set includes a gauge, a housing for receiving the gauge and a tube extending from the housing. The pumping set includes a cylinder inserted in the socket and a piston put in the cylinder. The first joint is put in the cylinder and includes a transverse channel and an axial channel communicated with the transverse channel. The second joint is inserted in the socket, the cylinder, the transverse channel of the first joint and the tube. The second joint includes an axial channel, a first transverse channel for communicating the axial channel hereof with the axial channel of the first joint and a second transverse channel for communicating the axial channel thereof with the tube. The nozzle is communicated with the second joint.

Abstract: The invention concerns a pump for compression of gases, such as air, of the type comprising a first cylinder and a second cylinder, a piston dividing said first cylinder into a first chamber located ahead of the piston and a second chamber located behind the piston, the piston and the second cylinder arranged to be displaced jointly relative to the first cylinder. A third chamber is formed between end walls of the cylinders and communicates with said second chamber via at least one opening formed in the jacket wall of the first cylinder. The pump is characterized by an inlet provided in the second end of the second cylinder in order to allow passage of air into a fourth chamber formed between the second end of the second cylinder and the end wall of the first cylinder, said fourth chamber communicating with said third chamber via a through-passage channel, wherein a valve is provided, formed in the end wall of the first cylinder.

Abstract: A pump includes a cylinder, a piston assembly, a first nozzle, a valve, a controller, a ring and a second nozzle. The cylinder defines first and second chambers and first and second channels for communication between the chambers. The piston assembly is received in the first chamber. The first nozzle defines a channel. The valve is received in the first chamber. The controller defines an axial channel and a radial channel communicated with the axial channel, and is received in the second chamber and linked to the valve through the second channel. The controller is movable between a first position for allowing the valve to seal the second channel and a second position for driving the valve to open the second channel. The ring is mounted on the controller so as to divide the second chamber into a first portion for communication between the first channel and the channel of the first nozzle and a second portion for communication between the second channel and the radial channel of the controller.

Abstract: A manual air pump with a handle includes a base member, a foot switch, an outlet cylinder, an inner cylinder and a pumping assembly. The foot switch is mounted on the base member. The outlet cylinder is mounted vertically on the base member. The inner cylinder is mounted vertically on the base member in the outer cylinder. The pumping assembly is moveably mounted in the outer cylinder and securely attached to the inner cylinder. Multiple check valves are mounted in the cylinders and the base member to form two stages to pump the air into the object to be inflated in a great quantity when the object to be inflated is in a low-pressure condition and easily pump compressed air into the object to be inflated when the object to be inflated is in a high-pressure condition.

Abstract: An air pump for a bicycle which can be stored inside the saddle post of a bicycle is disclosed. The hand air pump or foot-hand air pump are supported in the saddle post by friction generating means, latch means, support means and/or biasing means. Furthermore, a foot-hand air pump which is substantially cylindrical in shape and having no protruding parts is disclosed. Still further, the air/foot pump has certain parts thereof not only providing their intended function in pumping air but also providing the function of generating friction is disclosed.

Abstract: A hand pump includes a head, a cylinder, a piston rod, a first handle, and a second handle. The head includes a valve-engaging portion for engaging with a valve of an article to be inflated. A first end of the cylinder is connected to the head. A piston is securely mounted to a first end of the piston rod for reciprocation in the cylinder. The first handle is securely attached to a second end of the piston rod that extends beyond a second end of the cylinder. The second handle is attached to the head to provide an auxiliary grip.

Abstract: An air pump comprises an outer tube, a distribution guide tube, and a spring. The outer tube is provided in the interior with a large cylinder and a small cylinder. The distribution guide tube is disposed at the lower end of the outer tube and is provided with two air chambers, one of which is in communication with the large cylinder and is provided with a pressure leaking slide block, two leakproof rings, and an annular groove located between the two leakproof rings for forming a duct. The spring is disposed in the air chamber for providing the pressure leaking slide block with a recovery spring force. Another air chamber of the distribution guide tube is in communication with the large cylinder and the small cylinder for discharging air to inflate an inflatable object.

Abstract: A manual air pump includes an outer cylinder having a first chamber and a head provided to the second end of the outer cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. An inner cylinder is securely mounted in the first chamber of the outer cylinder and includes a first end secured in the second end of the outer cylinder and a second end, the inner cylinder defining a second chamber that is communicated with the outlet passage. A piston rod has a first end with a piston slidably received in the first chamber of the outer cylinder and a second end extended beyond the outer cylinder, the piston separating the first chamber into a first chamber section adjacent to the head and a second chamber section distal to the head, the piston rod defining a third chamber therein. A handle is secured to the second end of the piston rod to move therewith.

Abstract: A lance pump, particularly for lubricant, having a fixed plunger and a pump tube reciprocable in cycles through an outward stroke and an inward stroke on each cycle on the plunger, operable to deliver metered charges of lubricant on each outward stroke as well as on each inward stroke.

Abstract: To provide performance particularly in handling supercritical extraction systems, a specially designed pump includes a cam-driven, single-plunger with a cam having a profile that enables the pumping system to avoid destructive reverse torque on the cam, gear train and drive motor after the cam passes top dead center. The plunger includes a seal having one side in contact with the supercritical fluid and a mechanism for supporting and aligning the piston on the other side of the seal to maintain the piston in alignment. The piston drive has Hertzian contact with the piston. The fluid volume leaving the pump is determined by measuring only pressure or other parameters related to flow and movement of the plunger. Measurement of the fluid volume leaving the pump is useful for recording or indicating the flow rate while the pump is operating.

Abstract: A manual air pump includes an outer cylinder comprising a chamber therein, a head provided to an end of the outer cylinder, the head including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder reciprocatingly mounted in the outer cylinder. An outer piston is attached to an end of the inner cylinder to move therewith and includes a passage for communicating a longitudinal bore of the inner cylinder with one of the outlet passage of the head and the chamber of the outer cylinder. A piston rod is reciprocatingly mounted in longitudinal bore of the inner cylinder and an inner piston is attached to an end of the piston rod to move therewith. A handle is secured to the other end of the piston rod to move therewith. The inner cylinder is rotatable relative to the outer cylinder.

Abstract: A manual air pump includes an outer cylinder having a chamber therein, a head provided to a second end of the outer cylinder and including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder reciprocatingly mounted in the outer cylinder and including a longitudinal hole. An outer piston is attached to an end of the inner cylinder to move therewith. The outer piston includes a passage that is intercommunicated between the longitudinal hole of the inner cylinder and the outlet passage of the head. A piston rod is reciprocatingly mounted in longitudinal hole of the inner cylinder. An inner piston is attached to a second end of the piston rod to move therewith. A handle is secured to a first end of the piston rod to move therewith. A switch member is rotatably mounted to the first end of the outer cylinder and around the first end of the inner cylinder.

Abstract: A lance pump, particularly for lubricant, having a fixed plunger and a pump tube reciprocable in cycles through a downstroke and an upstroke on each cycle on the plunger, operable to deliver metered charges of lubricant on each downstroke as well as on each upstroke.

Abstract: A pump comprises a pair of coaxial pistons, one slidably positioned in the other for simultaneous compression causing similarly directed air flow, independent passages and valves for permitting air flow from each piston into the pump head for increased air flow, and a switching device for selectively opening one passage to ambient to decrease the air flow into the pump head. The pump thus has two modes, namely a high volume mode when the two pistons operate simultaneously to direct combined air flow and a high pressure mode when the passage is opened to ambient to direct air flow from only one of the two pistons.

Abstract: A hand pump includes a cylindrical member having a cap secured on top and a cover securing the cap to the cylindrical member. A large piston is slidably engaged in the cylindrical member and a barrel secured to the large piston. A small piston is slidably engaged in the barrel for pumping air into the cylindrical member and the cover. The small piston may pump a low air pressure when the barrel is not secured to the cylindrical member and may pump a high air pressure when the barrel is secured to the cylindrical member.

Abstract: The disclosed well purging and sampling pump has a hydraulically actuated rim driven cylindrical pumping piston assisted by an internal precharged gas return spring all mounted coaxially within a pump housing cylinder suitable for being lowered into and supported by the hydraulic conduits for actuation and pump delivery.

Abstract: A well pump, for pumping well fluid up a tubing string, the pump having inner and outer housings, inner and outer barrels, and upper and lower valves. A hydraulic fluid line extends downward through the casing, outside of the tubing string, from the surface to the housing, below the outer barrel and outside the inner barrel, to cause the outer barrel to move up and down. A wireline tool an be used to install and to remove the inner and outer barrels from the well pump.

Abstract: A displacement pump intended in particular for wearing and difficult to pump fluids such as concrete. It consists of a pump chamber (22) formed from a first tubular slide component (2) and a second similarly tubular slide component (4), with the second slide component being movably supported outside the first sliding component. As the sliding components move forwards and backwards in relation to each other, a cycle of compression and suction strokes will be produced. Inside the pump chamber (22) there is arranged a sleeve (6) of a soft, elastic material such as rubber covering the walls of the chamber and the contact surface between the two slides (2, 4). The sleeve (6) is free along essentially the entire distance between its attachment points (3, 5).

Abstract: Discussed herein is a rapid actuating device for a hydraulic actuator utilizing two or more relief valves to control the hydraulic flow of the actuator for various loading or no loading conditions in order to speed up the required operation time.

Abstract: An intravenous and intra arterial delivery system is described having a disposable cassette actuated by a pump and control electronics for providing positive but variable delivery rates. The cassette is self-priming and provides protection against the delivery of air by being unable to impel air, and means provide an indication of excessive air in the cassette. The electronics has low power consumption so as to be suitable for battery operation, such as by way of rechargeable batteries. A pressure sensor in the delivery line may be used to sense infiltration. The system further features a provision for predetermining the amount of fluid to be delivered, and a detection system for detecting an empty supply bottle.