Abstract: This invention provides a wheelchair with four wheel independent suspension and modular seating, allowing for customized seat selection and a variable ride. It includes a chair assembly, a chassis assembly and a suspension assembly. The chair assembly includes a seat; a seat mount; a seat angle adjuster; and a pillar. The chassis assembly includes a chassis; and a handle assembly. The suspension assembly includes a forward suspension assembly and a rear suspension assembly. In another embodiment, the wheelchair includes a chair assembly with handles, a main cross beam and a suspension spring assembly.

Abstract: An apparatus to block an access port of a pump includes a cover having a distal end and a proximal end, wherein the distal end is configured to be received into the access port, an indexing device to prevent rotation of the cover with respect to the access port, a first component of an anti-rotation mechanism located upon the proximal end of the cover, a retainer configured to rotatably engage and abut the proximal end of the cover to resist removal of the cover from the access port, a key to engage the proximal end of the cover through a profiled keyway of the retainer, wherein the key comprises a second component of the anti-rotation mechanism, and at least one magnet to retain the key against the proximal end of the cover, wherein the profiled keyway is configured to restrict rotation of the key with respect to the retainer.

Abstract: The invention relates to a lubricating pump which contains screw pistons of which one is in compression operation and the other is in suction operation in alternation. The invention further relates to a method for supplying lubricant, wherein a first screw piston is in a suction operation while a second screw piston is in a compression operation and vice versa, and wherein the two screw pistons are driven by means of a common gear train, which contains one piston gear for each screw piston.

Abstract: A pump driver, a disposable pump cartridge for use with the pump driver and a beverage dispenser employing the pump drive are disclosed. The disposable pump cartridge comprises at least one barrel 20 having an inlet valve 24 and an outlet valve 26 associated therewith. A piston 28 movable within the barrel 20 is retained in a minimum volume position during transit by a protrusion 22 on the internal surface of the barrel 20. The piston 20 has a piston shaft 28 with a hollow end arranged, in use, to releasably engage a piston driver to drive the piston 28 from its minimum volume position to an operative position, and to reciprocate the piston 28 within the barrel 20 in its operative position to draw fluid into and pump fluid from the barrel 20 via the inlet valve 24 and outlet valve 26 respectively. Methods of engaging, disengaging and changing the disposable pump cartridge are also disclosed.

Abstract: A quintuplex mud pump includes a pair of motors (18), a crankshaft (40) supporting five eccentric lobes (44), and first and second bull gears (30). Each of two pinion shafts (20) are rotationally independent, and has a pinion gear interfacing with a respective bull gear on the crankshaft (40). Five connecting rods (46) interconnect a respective eccentric lobe and a respective piston.

Abstract: A reciprocating apparatus for pumping pressurized fluid. The reciprocating apparatus comprises a plunger disposed within a cylinder, wherein the plunger is hollow and ported for enabling fluid within the cylinder to flow into the plunger. The plunger includes at least one outlet through which fluid within the plunger flows out of the plunger. In operation, the plunger retracts to displace fluid from the hollow body and into a discharge chamber, and the plunger extends towards the discharge chamber to discharge the displaced fluid. As the plunger alternately retracts and extends, fluid within the plunger continuously flows towards the discharge chamber.

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: A home care oxygen system includes an inline compressor that has all the check valves and gas flow passages between cylinders located in the cylinder head. Only a single check valve is used for each cylinder. The crankshaft is built up from a shaft with eccentrics and spacers.

Abstract: Pump, comprising a casing that is generally cup-shaped intended to be fixed to a driving motor (3), and containing a drive shaft (6) suitable for being coupled with said motor, and having a tilted surface for the actuation of one or more pistons (7) that move parallel to the axis of said drive shaft, where said casing consists of a monolithic body (2) that comprises means (4) for its attachment to said motor, a system for supporting and holding said drive shaft, and the guide and sliding seats of the quoted pistons.

Abstract: A liquid well pumping arrangement, especially for oil wells, comprising a pair of adjacent downhole reciprocating pumps each having a barrel, a piston rod connected to a piston slidable within the barrel, and valves adapted to cause liquid to flow from a lower inlet of the barrel to an upper outlet from the barrel when the piston is reciprocated in the barrel. The arrangement includes a well head pumping mechanism for applying reciprocating movement to sucker rods to cause movement of the pistons, the well head pumping mechanism being arranged to reciprocate each of the pistons at the same cyclic rate but with the motions of the two pistons being out of phase by 180°. A single delivery tube is connected to both of the outlets from the barrels such that, with the pumping mechanism operating, a substantially continuous flow of liquid can be produced from said delivery tube.

Abstract: A liquid well pumping arrangement, especially for oil wells, comprising a pair of adjacent downhole reciprocating pumps each having a barrel, a piston rod connected to a piston slidable within the barrel, and valves adapted to cause liquid to flow from a lower inlet of the barrel to an upper outlet from the barrel when the piston is reciprocated in the barrel. The arrangement includes a well head pumping mechanism for applying reciprocating movement to sucker rods to cause movement of the pistons, the well head pumping mechanism being arranged to reciprocate each of the pistons at the same cyclic rate but with the motions of the two pistons being out of phase by 180°. A single delivery tube is connected to both of the outlets from the barrels such that, with the pumping mechanism operating, a substantially continuous flow of liquid can be produced from said delivery tube.

Abstract: A pumping device is provided for pumping fluid from an inlet to an outlet. The pump comprises a piston reciprocable between an inlet chamber and an outlet chamber, a first valve between the inlet and the inlet chamber and responsive to reciprocation of the piston in a first direction to communicate the inlet to the inlet chamber, and a second valve between the inlet chamber and the outlet chamber responsive to reciprocation of the piston in a second direction to communicate the inlet chamber to the outlet chamber, whereby fluid is received in the inlet chamber when the piston reciprocates in the first direction and pumped from the outlet chamber when the piston reciprocates in either direction. Also provided is a pump assembly for pumping fluid for an anti-lock braking system. The pump assembly is a dual action pump including two pistons which are stroked 90.degree. out of phase with respect to each other by a common drive member.

Abstract: A high pressure liquid pump has a drivable swash plate and a plunger which is acted on by the swash plate and guided in a cylinder bore of the pump housing. In the region of the front end of the plunger facing the swash plate a valve arrangement is provided between a low pressure chamber and a pump chamber. A second valve arrangement is arranged between the pump chamber and a high pressure chamber. The plunger has a transverse bore which stands in communication with the low pressure chamber during the pump movement and also has an axial bore extending from the transverse bore to the front end of the plunger, with the axial bore being enlarged towards the front end while forming a ring-like valve seat, with a valve insert being arranged in the broadened section of the axial bore.

Abstract: The present disclosure is directed to a water/air pumping system comprising essentially a substantially flat primary reservoir, a header tank and a pump. At least one reciprocating piston is powered through the tank. Eccentric drive cams are directly connected to the motor driven shaft and are connected to drive the pistons to pump water or air from the reservoir into the tank. A water and or air supply connection is horizontally connected to the reservoir and is provided with a water/air control valve proximate the reservoir. A tank discharge connector is connected to a water or air service system through the side wall of the tank externally thereof, above the motor driven shaft and its direct drive connection with the pistons for lubricating the driving mechanism. An air inlet valve is situated in the external wall of the primary reservoir beneath the piston intake so that the pump may pump either air or water.

Abstract: A high-pressure plunger pump which is designed for maximum pressures in the range between 1,000 and 4,000 bars includes a pump housing centered on an axis and including a main body having two axially spaced ends, and a pump head mounted on one of the ends of the main body. A plunger coaxially extends into the pump housing, and a sleeve is floatingly supported on the plunger. The sleeve has two end portions one of which is closer to the pump head than the other, converges toward the pump head and has an axial end face. Pressure and suction valves are coaxially arranged within the housing. The pump head includes a tube which forms a collecting container for a pressurized medium being pumped. This tube has a bore extending transversely of a longitudinal axis of the tube and around the axis of the housing and receiving a sleeve-shaped end portion of a pressure valve holder, and an external contact surface surrounding one end of the bore and engaging a corresponding sealing surface of the holder.

Abstract: A dryer for the drying of clothing and other articles by use of a vacuum. A vacuum is applied to the internal chamber of the rotating drum by means of a swash plate which rotates simultaneously at an inclined angle with respect to the rotational axis of the drum. Suction assemblies, which include the use of one-way valve assemblies are provided between the internal chamber of the drum and the swash plate. A motor is to cause rotation of the drum which also simultaneously rotates the swash plate. The air and moisture particles from within the internal chamber of the drum are discharged into the ambient by the suction means.

Abstract: Unique constructional improvements in constructions involved in pumping. The invention is particularly adapted in deep well pumps which may be water or oil pumps or otherwise. The invention greatly reduces the mass of moving parts thereby proportionately reducing the energy required for pumping operations. Dual pistons are utilized which reciprocate oppositely, being connected by a cable passing over a pulley. Heavy sucker rods and pistons are eliminated. The pistons are light-weight with light-weight bellows-type seals. The pistons are activated by way of cables rather than sucker rods. Further gains are realized by minimizing the size of the piping utilized. This end is realized by way of an offset staggered relationship of the operating pistons in a smaller pipe or by way of plural pistons arranged in vertical array or assembly.

Abstract: A hand-operated hydraulic pump utilized to lift or trim an outboard marine engine. A wobble-action handle connects with a pinion gear which in turn drives a rack on a double-ended piston forming two cylinder chambers on opposite ends thereof. Reciprocal movement of the piston alternately pumps fluid from each cylinder chamber both of which are supplied by a common longitudinal passage in the piston across a pair of check valves located at each end of the piston. The pump housing includes the reservoir, discharge port and needle valve for relieving fluid from the discharge port back to the reservoir.

Abstract: An apparatus for compressing gaseous fluid including a reciprocating compressor and a receiver or tank connected with the compressor for receiving the compressed gaseous fluid. The compressor includes one or more cylinders supported on a crankcase having a rotating crankshaft therein with throws connected by connecting rods with pistons reciprocating in the cylinders. Discharge valves are reciprocably mounted at ends of the cylinders and are of a size substantially that of the cross-section of the cylinder bore and opening in response to pressure in the respective cylinders.