Abstract: A hermetic compressor includes a closed vessel for storing lubricating oil, an electric-driving element, and a compressing element driven by the electric-driving element. The compressing element includes a cylinder block forming a compression chamber, a piton that reciprocates inside the compression chamber, and an oiling device for supplying the lubricating oil to an outer circumference of the piston. A first oil groove is concavely formed on the outer circumference of the piston, and a second oil groove is concavely formed on a side opposite to the compression chamber relative to the first oil groove. The second oil groove has a spatial volume same or greater than that of the first oil groove. An expanded clearance portion is provided such that a clearance between the piston and the cylindrical hole portion broadens from a top dead point to a bottom dead point.

Abstract: A high pressure pump including a linear actuator comprising a servo motor adapted to axially rotate a hollow rotor shaft in alternating directions, the servo motor having a stator positioned co-axially around the hollow rotor shaft with an interior of the rotor shaft being co-axially coupled to a drive member to convert axial rotation into reciprocal displacement, the drive member being constrained against linear movement and threadingly supporting a shaft (to impart linear displacement of the shaft and an encoder monitoring movement of the drive member.

Abstract: A method of controlling a fluid pump. The pump has a plurality of oscillating pistons that travel along a central axis of a piston sleeve. A plurality of pistons is of similar mass within a piston sleeve are provided, and adjacent pistons are positioned to be 180 degrees apart in phase oscillations. An electric coil is provided for each piston, and the position of adjacent pistons is determined. The current to one of the electric coils for a piston is adjusted to maintain the 180 degree difference in phase between oscillations of adjacent pistons.

Abstract: A synchronous reluctance motor comprises a stator and a rotor, the rotor comprising: a rotation shaft; a first core having a shaft hole for inserting the rotation shaft at a center thereof, and having a plurality of first flux barrier groups arranged along a circumferential direction of the shaft hole and spacing from each other; and a second core having a receiving hole larger than the shaft hole at a center thereof, and stacked at one side of the first core in an axial line direction. A length of the rotor protruding from a supporting portion can be decreased without reducing a stacked thickness thereof, and a vibration occurrence in a horizontal direction with respect to the rotation shaft can be reduced, thereby enhancing a reliability of the synchronous reluctance motor.

Abstract: In one embodiment of the disclosure, a dish insert may be installed in a pump head such that the dish insert may be removed from the reagent head side of the pump head. Port holes permit movement of hydraulic fluid through the dish insert. The dish insert may be affixed to the pump head by fasteners. The dish insert may include removal means. For example, removal holes may be provided wherein fasteners may be threaded until the fasteners “bottom out” on the pump head. In this way, fasteners may force the dish insert out of the mounted position by acting against the threads as a jack screw.

Abstract: A fluid delivery system includes a pump operably coupleable to a source of fluid. A reciprocating electromagnetic actuator is coupled to the pump and has a coil that when energized causes the actuator to drive the pump. Coil current sensing circuitry is configured to provide an indication of current flowing in the coil. A controller is coupled to the coil current sensing circuitry and is configured to calculate a coil drive parameter based upon a plurality of coil current indications from the coil current sensing circuitry. Coil drive circuitry is coupled to the controller and is configured to supply current to the coil based on the coil drive parameter.

Abstract: The present invention relates to an improved system for efficiently and accurately performing immunoassays, such as ELISAs. The invention provides an immunoassay assembly which includes a flow-through unit and an aspiration pump. The immunoassay flow-through unit includes an outer seal; at least one bed support; an inner seal; and a packed non-porous bed. The unit is releasably attached to an aspiration pump which enables the controlled flow rate of liquid passing through the packed bed of the flow-through unit. The invention also provides a method of using the immunoassay assembly to identify analytical targets of interest.

Abstract: Disclosed is a hermetic compressor. A plurality of cylinders are disposed at upper and lower sides, a communication path is formed so as to communicate inlets of the cylinders with each other, and a suction pipe connected to a system is coupled to an inlet of one cylinder. This more reduces the number of components and processes than in the conventional case that a plurality of suction pipes are connected to a plurality of cylinders. Accordingly, the fabrication costs can be reduced, and increase of vibration of the hermetic compressor due to resonation of the suction pipes can be prevented. Furthermore, the hermetic compressor can have an enhanced performance by optimizing a specification of the suction pipe and its suction path.

Abstract: A hermetic compressor includes an airtight container containing lubricating oil and having a compression element and a motor element. The compression element compresses a refrigerant by being driven by the motor element. The compression element includes a crankshaft extending in a vertical direction and having a main shaft and an eccentric part; a block forming a compression space; a piston having a cylindrical shape and reciprocating in the compression space; and a connecting rod for transmitting the rotation of the eccentric part to the piston. The piston has its center of gravity on either the upper side or the lower side in the vertical direction with respect to a plane which passes through the central axis of the piston and is perpendicular to the crankshaft.

Abstract: A chemistry analyzer precision pump is disclosed. In one general aspect, it has a pump block that defines a first pump chamber with a fluid port at a first end, an opening for a piston at a second end, and a seal mount located between the opening and the port. A second, smaller, pump chamber also has a fluid port at a first end, an opening for a piston at a second end, and a seal mount located between the opening and the port. A first seal is mounted at the first seal mount and a second seal is mounted at the second seal mount. A first piston is mounted to reciprocate in the first pump chamber, past the first seal, and a second, smaller piston is mounted to reciprocate in the second pump chamber, past the second seal. The first and second pistons and the first and second pump chambers can be conically shaped.

Abstract: A hermetic-type compressor according to the present invention has a viscous pump part by combining a spiral groove formed on the outer periphery of a main shaft with the inner periphery of a main shaft bearing, and at least one sliding section being in a sliding engagement with the main shaft bearing and at least one non-contact sliding-section having a predetermined gap with the main shaft bearing are formed on the face at the outer periphery of the main shaft opposing to the main shaft bearing where the lower end of the groove is located at the non-contact sliding-section.

Abstract: The invention relates to a pump element for installation in a pump bore of a hydraulic block, which includes a pump plunger, a restoring spring for the pump plunger, and an inlet valve having an inlet valve cover, in which a closing spring and a closing body are arranged. According to the invention, the inlet valve cover has a high pressure sealing section, which rests against the valve seat element in the axial direction with spring force support provided by the restoring spring. The valve seat element is positively connected to the pump plunger at least before installation of the pump element in the pump bore. Centering elements are provided for centering the inlet valve cover relative to the valve seat element. The invention further relates to a hydraulic block and to an installation method.

Abstract: A pump and stopper combination for vacuum or pressure sealing a container. The stopper has a pour opening and a one-way valve movable between an operative position to permit one-way flow of fluid into or out of the container when the pour opening is in the closed position, and an inoperative position when the pour opening is in the open position. A vacuum/pressure pump that connects to the stopper includes a drive adapted to convert rotational movement of a motor to reciprocating motion of a pump piston in a chamber, and one-way pump valves mounted in a selectable flow control member. The selectable flow control member is movable between pressure and vacuum positions to permit passage of fluid only into or out of the pump chamber. The pump also includes an indicator for indicating when a desired level of vacuum or pressure has been reached. The pump may be incorporated into a container lid.

Abstract: The liquid discharging device includes a driving mechanism that drives a needle, a measurement plunger member and an inlet valve member that are concentrically-arranged inside a container. The driving mechanism includes: a piezoelectric-element support plate to which piezoelectric elements are attached; a spring for biasing the piezoelectric-element support plate toward a discharge outlet; and a control device adapted to control the piezoelectric elements separately. The piezoelectric-element support plate includes: a base end to which first end sides of the piezoelectric elements are fixed; a drive unit to which second end sides of the piezoelectric elements are fixed; and a displacement expanding portion expanding and outputting a displacement of the drive unit, the drive unit being displaced in conjunction with a expansion and contraction driving of the piezoelectric elements.

Abstract: A refrigerant compressor includes a hermetic container storing refrigerant oil an electrically-driven element and a compressing element driven by the electrically-driven element. The compressing element includes a cylinder block having a cylindrical compression chamber and a cylindrical piston reciprocating in the compression chamber. The compression chamber and the piston have a diameter difference in the range of not shorter than 4 ?m to not longer than 15 ?m. The refrigerant oil has viscosity of 8 mm2/s or less at 40° C. and is prepared by mixing a first refrigerant oil having viscosity of less than 8 mm2/s at 40° C. with a second refrigerant oil having viscosity of 20 mm2/s or more at 40° C.

Abstract: Valveless piston pumps are disclosed that are magnetically driven, thereby eliminating a troublesome dynamic seal used on conventional valveless piston pumps. An exemplary embodiment includes a housing defining a bore having a bore axis. A piston is situated in the bore so as to be movable in the bore in a reciprocating manner along the bore axis and in a rotational manner about the bore axis. A magnet is situated in the bore and is coupled to the piston. The magnet is engageable magnetically with a magnet-driving device configured to cause the magnet, and thus the piston, to move in the reciprocating manner and in the rotational manner. An exemplary magnet-driving device is a stator assembly.

Abstract: Some embodiments of a medical infusion pump system include a pump device and a removable controller device. When the pump device and the removable controller device are removably attached to one another, the components may provide a portable infusion pump unit to dispense medicine to a user. In particular embodiments, the removable controller device includes a user interface to readily provide information, for example, about the operation of the pump.

Abstract: Disclosed is a pressurized internal oil management system, comprising an oil dam, at least one oil separator, at least one oil collection manifold, at least one oil pump, and one or more paths for returning the separated oil; said system integrated within the casing of a fluid displacement device to supply adequate lubrication regardless of orientations under zero to full gravity, and methods and applications related thereto. Fluid displacement devices useful herein include oil lubricated rotary or reciprocating machinery, such as compressors, expanders, pumps and engines, in the casing of which exists one or more drive mechanisms that can be utilized to operate the oil management system, in most cases without even increasing the size of the casing.

Abstract: A hermetic compressor of the present invention includes a thrust-ball bearing having balls (168) disposed in a holder (170) in a manner that the balls (168) roll along at least two tracks (182a, 182b, 184a and 184b). The invented structure decreases the number of balls (168) that roll along each of the tracks (182a, 182b, 184a and 184b), and reduces a frequency of sliding between the balls (168) and the tracks (182a, 182b, 184a and 184b), thereby alleviating wear of the tracks.

Abstract: Device for injecting a liquid additive including an additive tank connected by an additive pipe to an injector positioned in the exhaust system of the vehicle concerned, where there is provided, on the additive pipe, a positive-displacement lift-and-force pump including a cylinder and a piston which delimits within the cylinder a pressurizing chamber, and where an electric actuator is coupled to the piston to cause it to retreat, drawing additive into the chamber from the tank and simultaneously compressing a spring that acts on the piston, such that by virtue of the spring, the forward movement of the piston, delivering additive to the injector, takes place under controlled pressure.

Abstract: An alternative piston pump, able to take in and dispense a determinate quantity of a dye, paint or similar product, comprising a container having a cylindrical cavity inside which a piston is able to slide axially, and a sleeve extendible axially and rigid radially, inserted into said cylindrical cavity and having a first end connected to said piston. The sleeve extendible axially and rigid radially has a second end connected through a flange to a closing plate, able to close one end of the cylindrical cavity, and the piston and the sleeve extendible axially and rigid radially are made in a single piece.

Abstract: An electric submersible pump device having a motor part, a pump part, and a protector part. The protector part includes redundant shaft seal parts.

Abstract: When a flywheel rotates and a first magnet comes close to and opposes a fuel pump, a plunger is moved toward a partition wall of a pump chamber against an urging force of a spring by a magnetic repulsive force generated between the first magnet and a second magnet in the fuel pump. When the first magnet separates from the fuel pump, the plunger is moved and returned toward a protective cover by the urging force of the spring. As a result, the plunger in the fuel pump reciprocates with rotation of the flywheel, and the capacity of the pump chamber increases and decreases, so that fuel is sucked and discharged.

Abstract: The invention relates to a metering pump for feeding out viscous materials, which pump comprises a housing having an inlet, connectable to a viscous material source, and an outlet; a valve body of cylindrical basic shape, which is rotatable into at least two positions by means of a drive unit, a first position allowing a flow of the said material from the inlet to the housing and a second position allowing a flow of the said material from the housing to the outlet. The pump also comprises a cylinder device connected to the housing, having a controllable piston intended to achieve the said flow of material, and at least one device for cleaning the metering pump. The said cleaning device comprises at least one nozzle for cleaning agent, disposed in a valve-body-facing part of the piston. The invention also relates to a method for cleaning such a metering pump.

Abstract: An air compressor that employs splash lubrication to lubricate and cool a piston kit that includes a cylinder and a piston reciprocating in the cylinder. In one form, cooling channels can be coupled to or formed on the cylinder to direct the lubricant that is splashed onto the cylinder to drain in a desired manner, such as helically around the exterior of the cylinder, to more effectively cool the piston kit. In another form, the cylinder can include an annular flange that can be bigger in diameter than a remainder of the cylinder. The annular flange can be received into a counterbore in a cylinder block. A cylinder head, which can be fastened to the cylinder block, can apply a clamping force to the annular flange to clamp or fix the cylinder to cylinder.

Abstract: A reciprocating pump assembly comprises: a motor with a rotary motor drive shaft; a cam coupled to the motor drive shaft with an axis of rotation and a cam channel cut generally axially into a radial face of the cam; and multiple reciprocating pump units arranged radially about the cam axis of rotation, each with an inlet valve, an outlet valve, a plunger and a plunger sleeve, with a free end of its plunger coupled to the cam by way of a cam follower riding in the cam channel; wherein rotation of the motor output drive shaft causes the plunger in each pump unit to independently reciprocate in its respective sleeve.

Abstract: A machine includes at least one piston (1) reciprocally movable in a cylinder (2), at least two balancing rotors (3c, 3d) mounted for oscillating rotational movement about an axis or axes (4) transverse to the axis of motion of the piston, one balancing rotor having a centre of mass on one side of and another balancing rotor having a centre of mass on an opposite side of the axis or axes of motion of the rotors, and at least one connecting member or mechanism between the piston and rotors so that the rotors move in opposition to the reciprocal movement of the piston. The machine may be an electrical machine such as an electric motor or generator. An electronic control system may control piston motion or output waveform.

Abstract: In a hermetic compressor, aggression to an organic material is low by using a refrigeration oil using, as a base oil, an alicyclic multivalent carboxylic acid ester compound and made of an alicyclic multivalent carboxylic acid ester compound having at least two ester groups, the at least two ester groups being bound to carbon atoms adjacent to each other on an alicyclic ring. The ratio of hydrocarbon radicals in which carbon number is 4 or less among hydrocarbon radicals bound to the at least two ester groups is 15% by weight or less.

Abstract: Disclosed herein is a linear compressor, which is designed in such a fashion that oil is suctioned into a space between a cylinder and a piston by a low pressure produced between the cylinder and the piston when the piston moves backward, and then is discharged to the outside by a high pressure produced between the cylinder and the piston when the piston moves forward, resulting in a simplified oil pumping structure and low cost.

Abstract: The present invention relates to a fluid pump and a fluid-transfer plate and a sensor for a fluid pump, particularly applicable to linear compressors, for detecting the position of the respective piston and preventing the latter from colliding with the fluid-transfer plate upon variations in the compressor operation conditions, or even variations in the feed voltage. The objectives of the present invention are achieved by means of a fluid pump (1) comprising a piston (2) that is axially displaceable within a cylinder (3), the cylinder (3) comprising a cylinder closing fluid-transfer plate (40), the piston (2) being displaced toward the fluid-transfer plate (40) and capturing a gas or fluid from a low-pressure environment (11), and the fluid pump (11) comprising a sensor assembly (98), which includes an inductive sensor (8) associated with the fluid-transfer plate (40).

Abstract: Provided is a hermetic compressor in which an electric element having a stator and rotor provided therein and a compression element driven by the electric element are housed and the compression element includes a shaft which has a main shaft portion and an eccentric shaft portion, a cylinder block, a main shaft bearing which is formed in the cylinder block and supports the main shaft bearing of the shaft, a piston which reciprocates, a connection mechanism which connects the piston to the eccentric shaft portion, and a thrust-ball bearing, the thrust ball bearing having a plurality balls and a holder portion for holding the balls, and the holder portion being formed of polymer obtained by polycondensating diaminobutane and adipic acid.

Abstract: A hermetic compressor to conduct electricity to a stator coil without peeling off a coating formed on the coil while preventing the separation of the stator coil or lead wire from a compressible terminal. In the hermetic compressor including a hermetic container, a compression device to compress a refrigerant, a drive device to drive the compression device, the drive device including a stator formed by winding the stator coil on a core and a rotor to rotate inside the stator, the lead wire extending from a terminal block to receive electricity, and a compressible terminal to be compressed after the stator coil and the lead wire are inserted into the compressible terminal, the stator coil is formed by covering an aluminum wire with an enamel coating, and the compressible terminal includes electricity-conduction protrusions to piece the enamel coating so as to come into contact with the aluminum wire.

Abstract: A pumping apparatus (200) for delivering liquid at a high pressure (Psys) at which compressibility of the liquid becomes noticeable, comprises a piston (20) adapted for reciprocation in opposing directions in a pump working chamber (30), and a drive (40) coupled to the piston (20) to apply a tension force onto the piston (20) in order to move the piston (20) into a drive direction (50).

Abstract: A miniature unidirectional valve configured to restrict the free flow of fluid through the valve includes a valve body having an inlet and an outlet. A flexible membrane is movably disposed over the inlet and outlet, and movable between an open position and a closed position. The flexible membrane is movable by a pressure from the inlet to move the membrane to the open position. A control chamber is disposed in the valve body adjacent the fluid flow path, and configured to apply a pressure against the membrane to move the membrane to the closed position to restrict fluid flow through the valve. A preload structure is associated with the flexible membrane, and biases the flexible membrane toward the closed position.

Abstract: A compressor capable of surely preventing leakage of a refrigerant gas from a connection portion between an airtight container and a pipe to the outside at low cost is provided. The compressor comprises an airtight container to which a refrigerant introduction pipe is connected, and a compression element received in the airtight container to discharge the refrigerant into the same. The refrigerant introduction pipe has a cylindrical pipe main body, and a jaw-like flange portion formed in a tip of the pipe main body. A cylindrical connection sleeve is disposed between the refrigerant introduction pipe and the airtight container. A first bolt is disposed to connect the connection sleeve to the airtight container, and a second bolt is disposed to connect the connection sleeve to the flange portion of the refrigerant introduction pipe. The flange portion of the refrigerant introduction pipe hides the first bolt.

Abstract: A pump for pumping a fluid is disclosed. The pump comprises an inlet, an outlet, an internal volume disposed between said inlet and said outlet, a first pumping arrangement operable to pump a first volume of fluid from the inlet means into the internal volume, and a second pumping arrangement operable to pump a second volume of fluid from the internal volume into the outlet. In a first mode of operation of the pump, the first volume of fluid is greater than the second volume of fluid such that, in use, the pressure of the fluid within the internal volume is elevated to a level above the pressure of the fluid at the inlet.

Abstract: The invention concerns a piston compressor cylinder arrangement (1), particularly for a hermetically enclosed refrigerant compressor, with a cylinder body (2) and a cylinder head arrangement (7), the cylinder body (2) having a first front side (6) in the area of the cylinder head arrangement (7) and a second front side (8) at the other end. It is endeavoured to manufacture such a cylinder arrangement in a cost-effective manner without having to fear for a deformation during mounting. For this purpose, a cup-shaped mounting sleeve (9) surrounds the cylinder body (2) over its full axial working length with a radial distance on all sides.

Abstract: The invention relates to a refrigerant compressor having a compressor housing in which a cylinder housing (26) (FIGS. 15, 16) and an electric motor (5) (FIGS. 1, 2) are fastened to one another, the electric motor comprising a stator (6) provided with a stator bore (13) (FIGS. 5, 8), the coil core (8) of which is provided with a plurality of receiving grooves (9) for accommodating a stator winding (11, 12) having any given number of windings, coil groups, and poles, wherein the coil core (8) is preferably composed of a plurality of interconnected stator segments (16) and wherein the stator winding (11, 12) in the region of the end faces (22, 23) (FIG. 23) of the coil core (8) has winding heads (11?, 12?) which are each situated outside the receiving grooves (9).

Abstract: A solenoid actuator (1) attached to hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first bearing (7) and a second bearing (8) supporting the shaft (5) on either sides of the plunger (4). A plunger front chamber (74) is formed between the first bearing (7) and the plunger (4), and a plunger rear chamber (75) is formed between the plunger (4) and the second bearing (8). By providing a plunger exterior oil passage (63) on the outside of the plunger (4) to connect the plunger front chamber (74) to the plunger rear chamber (75), working oil flows through the plunger exterior oil passage (63) every time the plunger (4) strokes, thereby preventing a deposit of contaminant on the plunger (4) without increasing a stroke resistance of the plunger (4).

Abstract: An air compressor and tire repairing combination includes an air compressing device for generating a pressurized air, a tire repairing device having a container for receiving a repair liquid, and a tubular member having a bore for receiving the pressurized air and having an inlet port coupled to the air compressing device for receiving the pressurized air, and having an outlet port for supplying the pressurized air out through a nozzle, and having an exit for selectively supplying the pressurized air to the container and to selectively force the repair liquid to flow out of the container and into a faulty tire and to repair and to inflate the faulty tire simultaneously.

Abstract: A hydraulic pressure amplifier with a housing which has an end face at a low pressure side and an end face at a high pressure side and a circumferential wall between the two end faces, wherein an outlet valve is arranged adjacent the end face on the high pressure side, and an outlet duct for the hydraulic liquid which is under high pressure. In a pressure amplifier of the above-described type, the outlet duct opens into the circumferential wall or extends through a connection plug which is screwed into the end face on the high pressure side and closes off an assembly duct which receives the outlet valve.

Abstract: A high pressure pump for use in the injection of liquid chemicals into subsea oil or gas wells, and intended to be positioned in the subsea environment adjacent to the wellhead, comprises a piezoelectric actuator (19) for reciprocating a plunger (22) which acts to compress and expand the effective volume of a pumping chamber (29) having a valved inlet (15) connected to a source of the liquid and a valved outlet (16) to lead the liquid to the well. The device has a minimum of moving parts and in particular avoids the need for any rotating parts and attendant high performance bearings and seals.

Abstract: The invention relates to an apparatus and method of statically sealing a reciprocating-type fuel pump, such as a direct injection high pressure piston-type fuel pump. The first embodiment of the invention is a fuel pump comprising a pump body, a fuel reservoir within the pump body, wherein the fuel reservoir is capable of holding fuel and a bellows attached to the pump body, wherein the bellows is a stretchable membrane acting as a static seal. The second embodiment further comprises a diaphragm seal inside the pump body, and adjacent to the fuel reservoir, and a working fluid reservoir adjacent to the diaphragm seal, wherein the working fluid reservoir is capable of holding fluid. The diaphragm seal is a static seal separating the working fluid reservoir and the fuel reservoir.

Abstract: A compressor has a hermetic container filled with a lubricant and accommodates an electric element provided with a stator and a rotor and a compressing element, wherein the compressing element includes a shaft, a cylinder block, a piston, a connection mechanism, a bearing, and a thrust ball bearing provided between the rotor and a bearing end surface as an end surface of the bearing, and wherein the thrust ball bearing includes a plurality of balls, a holder portion for holding the balls, upper and lower races disposed on and beneath the balls, a rotation regulation portion for regulating a rotation of the lower race, and a thrust surface provided at the bearing end surface so as to contact with a lower surface of the lower race.

Abstract: A condensate pump for an HVAC system includes a reservoir, a solenoid pump assembly with a solenoid pump, and a solenoid pump electronic control module for limiting the amount of energy delivered to the solenoid pump during one half cycle from an AC current source. The solenoid pump is mounted in the solenoid pump assembly by means of shock absorbing material, and the solenoid pump assembly is mounted on a support member with shock absorbing material interposed between the solenoid pump assembly and the support member.

Abstract: In a first embodiment, an electromagnetic pump has a housing including first and second spaced apart electromagnets. A controller for controlling the magnets and a power source for powering the electromagnets within the housing. A removable cassette is in engagement with the housing between the first and second electromagnets and includes a cavity. The pump also has inlet and outlet ports in communication with the cavity and a magnetic piston disposed within the cavity. In preferred embodiments the electromagnets are capable of operating at different strengths and different polarities.

Abstract: A rotor is accommodated in a yoke housing. Six magnets are arranged at equal intervals in the circumferential direction on the inner circumferential surface of the yoke housing so as to face the rotor. The core is generally cylindrical and includes an annular portion at an anti-output side and a balance at an output side. The magnets have six poles so as to effectively narrow a basal path width of the core in which the line of magnetic force concentrates most and magnetic saturation is likely to occur most. This reduces the diameter of the core. Therefore, the motor is effectively miniaturized in the axial direction and in the radial direction without complicating the formation steps.

Abstract: A reciprocating drive apparatus has a driving device and a driven device, one of the devices comprising a reciprocating member mounted for movement along a longitudinal axis. At least one rotary member is coupled to one of the devices and a linear bearing assembly has a linear guide rail and a linear slide member with an end coupled to the other device. A connecting link has a first end pivotally connected to the rotary member and a second end pivotally linked to the slide member. Where the reciprocating member is the driven device, rotation of the rotary member will cause the reciprocating member to move back and forth along the longitudinal axis.

Abstract: A mechanical flow battery comprises a flywheel system in which a spinning axis can be driven by an air-powered motor and the structure of the gyroscope is employed in the mechanical flow battery. The structure of the gyroscope can be constructed by coupling the housing of the flywheel system with a nutation frame which couples a precession frame so that the spinning axis in the flywheel can be isolated from any outside gyroscopic torque.

Abstract: A pumping system is described comprising a bracket being vertically fixed onto the connection end of a pump basement and also connected to a wellhead in order to support multiple fixed pulleys fixed on the same plane as the top end of the bracket), an electric motor and a speed reducer also successively being fixed to a lower end of the bracket. The end head of an output shaft of a speed reducer is connected by means of a crank whose top end head is connected with a movable pulley that is on the same plane as the fixed pulleys. A flexible cable vertically hung in the center of the wellhead is successively wound across the fixed pulleys and the movable pulley and then is locked onto the pump basement. The flexible cable is downwardly connected to a plunger element of an upper wellhead canned pump and also to a plunger element of a downhole oil well pump.