Abstract: A pump which is adapted to be operably moved or to use a high-pressure air cartridge to inflate an object includes a cylinder assembly, a first nozzle head assembly, and a second nozzle head assembly. The pump that is operably moved will induce external air in a chamber defined in the cylinder assembly. The first nozzle head assembly is engagable with the air cartridge and the object and allows high-pressure air in the air cartridge to flow into the object. The first nozzle head assembly is not in fluidal communication with the chamber. The second nozzle head assembly is engagable with the object and allows the air in the chamber to flow into the object by operably moving the pump.

Abstract: Systems and methods for providing a hydraulic lift device for use in producing a subterranean well. In some cases, the hydraulic lift device includes a hydraulic cylinder having a first cylindrical sleeve slidably coupled to a second cylindrical sleeve, wherein the first and second sleeves define a hollow channel to accommodate passage of a polished rod. In some cases, the first cylindrical sleeve includes a surface for securing a portion of the polished rod. Additionally, in some cases, the lift device includes a port in fluid communication with the hollow channel, wherein the port is configured to receive an inlet line from a hydraulic pump. In some cases, the lift device also includes a guidance system disposed at least partially outside the hydraulic cylinder, wherein the guidance system is configured to prevent axial rotation of the first cylindrical sleeve with resect to the second cylindrical sleeve. Other implementations are described.

Abstract: A mini pump has a head including a connective end, a nozzle and an air channel communicating the connective end with the nozzle. A cylinder assembly is removably engaged with the connective end of the head. A tube is selectively received in the cylinder assembly and has an end connected to the connective end. The head is locked to the cylinder assembly and the tube is concealed in the cylinder assembly when the head is in a first position. The head is disengaged from the cylinder assembly and the tube extends out of the cylinder assembly when the head is in a second position.

Abstract: A floor pump includes a base; and a cylinder assembly having a first end coupled to the base and a second end, with a cross-sectional area of the first end of the cylinder assembly being larger than the second end of the cylinder assembly. A linkage assembly is partially disposed in the cylinder assembly and communicates with the base. A hose has a first end coupled to the base and communicating with the linkage assembly and a second end coupled to a thing desired to be inflated.

Abstract: A rotary compressor includes a compression mechanism, an electric motor and a controller. The compression mechanism includes a piston and a cylinder having two cylinder chambers. The electric motor is configured to change volumes of the cylinder chambers by eccentrically moving the cylinder and the piston relative to each other. The controller is configured to change an output torque of the electric motor in accordance with a variation in a load torque of the compression mechanism in one turn of rotation.

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 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: Fluid displacement apparatus with a set of opposing pistons in traveling chambers and a set of opposing pistons in stationary bores; a second embodiment with all pistons in traveling chambers; a third embodiment with all pistons in stationary bores. In each embodiment the displacement of the pistons can be different and the displacement can be variable. The apparatus is connected to a fuel cell stack to supply compressed gaseous fluid from a portion of the chambers and receive exhaust from the fuel cell stack in other chambers to perform an expander function. The apparatus can also be connected to a fuel cell stack and a reformer to supply compressed gaseous fluid to both and to receive exhaust from both as an expander. The chambers are sized differently to provide a pressure ratio across the fuel cell stack.

Abstract: A clamp device for a hand air pump includes a sleeve including a first end securely attached to an output end of a cylinder of the hand air pump and a second end for receiving a valve of an article to be inflated, a plug mounted in the sleeve, a protective ring mounted between the sleeve and the plug such that the plug does not move when the sleeve rotates, and a nozzle communicating the output end of the cylinder with an interior of the sleeve.

Abstract: A manual air pump includes a cylinder having a first chamber and a head provided to the second end of the cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. A first piston rod has a first end with a first piston slidably received in the first chamber. The first piston separates the first chamber into a first chamber section adjacent to the head and a second chamber section distal to the head. The first piston rod defines a second chamber therein. A second piston rod has a first end with a second piston slidably received in the second chamber. The second piston separates the second chamber into a third chamber section adjacent to the first piston and a fourth chamber section distal to the first piston. A handle is secured to the second end of the second piston rod to move therewith.

Abstract: A pump includes a first cylinder with a first valve member connected to a first end of the first cylinder and a first handle disengagably connected to a second end of the first cylinder. A first piston is movably received in the first cylinder and a second cylinder fixedly connected between the first handle and the first piston. A second piston is movably received in the second cylinder and a rod is connected to the second piston. The rod extends through the first handle and connected to second handle which is disengagably connected to the first handle. The movement of the first piston is used to pump tires and the movement of the second piston is used to pump a cylinder of air suspension device.

Abstract: A tire pump includes a head portion with a tubular portion extending therefrom and a main passage is defined through the head portion and communicates with the tubular portion, a connecting member slidably mounted to the tubular portion and having at least one first passage defined therethrough, a first cylinder retractably mounted to the tubular portion and having one of two ends fixedly connected to the connecting member and a first member slidably received therein which is fixedly connected to a free end of the tubular portion and detachably connected to the connecting member by an actuating device and has a uni-directional valve disposed therein. At least one second cylinder is retractably mounted to the first cylinder and has a second member slidably received therein which has a uni-directional valve disposed therein and a portion fixedly received in the other end of the first cylinder. A third member is fixedly received in the second cylinder and has a uni-directional valve disposed thereto.

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: A telescopic manual pump has a first cylinder, a second cylinder received in the first cylinder, a third cylinder received in the second cylinder, a piston slidably received in the third cylinder and a stem linked to the piston. The first cylinder defines a nozzle through a first end and an opening through a second end. The second cylinder defines a first opening through a first end, a second opening through a second end and a piston about the second end thereof. A first limit is attached to the second end of the first cylinder for retaining the piston of the second cylinder in the first cylinder. The third cylinder defines a first opening through a first end, a second opening through a second end and a piston about the second end thereof. A second limit is attached to the second end of the second cylinder for retaining the piston of the third cylinder in the first cylinder. The piston has first and second disks spaced from each other. A plurality of holes are defined through the first disk of the piston.

Abstract: A manually operable hand-held unit for eliminating air from a hose to be used as a pool vacuum hose having a quick coupling adaptor for connecting the air-evacuated hose to the inlet of a powered pool skimmer pump to eliminate the necessity of evacuating air from the hose by manually sucking pool water with the mouth.

Abstract: A positive displacement apparatus of the general type used as superchargers on internal combustion engines has two or more compression chambers capable of lateral movement to accommodate circular motion of the pistons. The driving forces for the chambers are derived from forces originating independently of the movement of the pistons, that is, the chambers, instead of being driven by the pistons, are driven directly from the eccentric mechanism that drives the pistons. A lateral reciprocating motion is imparted to two transfer members that are mechanically secured to the end of, or form part of, the chamber. Preferably, each of the end plates of the chamber forms an integral part of the chamber drive structure. An orbitally-driven, non-rotating, rigid drive sleeve encompasses two spaced eccentric drive members on a drive shaft and supports the piston drive structures. Rotational forces generated by the chamber drive arrangement are resisted by sets of guides rails and slidably mounted pads.

Abstract: Rectangular pistons are driven in a circular orbit by two spaced eccentrics on a common crankshaft. The displacement chambers reciprocate with a lateral motion parallel with the crankshaft. The radial forces created by the fluid pressure in the displacement chambers are balanced by a connection to the crankshaft through rotatable and slidable antifriction bearings. During the reciprocating lateral motion of the chambers, port openings located in the outer ends of the chambers are connected alternately to matching intake and exhaust port openings in the adjacent surfaces of the casing to provide a reversible valveless control of the fluid to and from the chambers. The apparatus can be used either as a pump or motor without internal modifications. The pistons are secured together as one piece and follow identical orbital paths. Each pair of opposing displacement chambers are secured as one piece and radially connected to the crankshaft.

Abstract: In a radial piston engine, in order to reduce the friction forces appearing at the pistons, a guide part is provided which engages a hollow piston through a guide section and which includes a bearing section at its outer end, by means of which the guide part is pivotably mounted in the cylinder cover.

Abstract: A fluid pumping apparatus includes at least two counter-balanced, counter-reciprocating pump assemblies. Each pump assembly includes at least two generally vertical, balanced, reciprocating pumps.

Abstract: A wave driven pump includes a buoyant wave follower having an elongated hollow body member depending therefrom with a piston in the body member. The remote end of the body member or cylinder is moored to the sea floor, and the piston is also moored so as to maintain its vertical position generally constant. Means are provided to permit the portion of the cylinder containing the piston to move up and down with respect to the piston in response to wave movements so that a pumping action results to pump water from a pumping chamber in the cylinder upstream from the piston.