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Pumps > Motor Driven > Electric Or Magnetic Motor > Reciprocating Rigid Pumping Member Reciprocating Rigid Pumping MemberReciprocating Rigid Pumping Member patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.06/28/07 - 20070148016 - Reciprocating drive apparatus and method 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 ... 06/14/07 - 20070134107 - Feeding pump device of volume tube continually metering type A feeding pump device of volume tube continually metering type comprises: a volume tube (1) provided with metering volume section (11), a dragging mechanism (2), and an unilateral inlet valve (8) and an unilateral outlet valve (7). Said volume tube (1) particularly have two unilateral inlet valves (8) and two ... 06/07/07 - 20070128056 - Highly efficient durable fluid pump and method A highly efficient fluid pump and pumping method are disclosed. The pump includes a cylinder, a piston in the cylinder defining a first and second volume in the cylinder, and a motive actuator for driving reciprocatively a rod attached to the piston at a rate of substantially sinmx for x=0 ... 05/17/07 - 20070110599 - Plunger piston compressor for refrigerants The invention concerns a plunger piston compressor (1) for refrigerants, particularly for CO2, with a case-like housing, having a compressor block (2) with a compression section comprising a cylinder (13) as first housing element and a bottom part (3) as second housing element, the compressor block (2) and the bottom ... 05/03/07 - 20070098575 - Pumping system 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 ... 04/12/07 - 20070081909 - Hydraulic lock for axial motion output device A system for locking the axial position of an axial motion output device upon the loss of an electrical input signal includes a locking device operatively associated with the output device and adapted for movement between a neutral position in which the output device can move freely relative to the ... 04/12/07 - 20070081908 - Compressor An oil pump is provided with helical grooves 142 and 142′ carved on the outer periphery of the shaft 125, with an approximately cup-shaped sleeve 146 loosely fit to the outer periphery of the shaft such that the bottom part of the shaft and the bottom plate of the above-mentioned ... 03/22/07 - 20070065311 - Air compressor having changeable structure An air compressor includes a piston slidably received in a cylinder housing, and a motor coupled to the piston for moving the piston relative to the cylinder housing in a reciprocating action, in order to generate pressurized air. A cover is detachably secured on top of the cylinder housing, and ... 03/15/07 - 20070059189 - Hermetic compressor and manufacturing method of suction muffler This relates to a hermetic compressor and a manufacturing method of a suction muffler, and discloses a technique for making energy efficiency higher and reducing noise. According to that technique, in a suction muffler 140 having a sound attenuation space 143, by foam-molding a wall 147, such as an opposite ... 02/01/07 - 20070025864 - Hermetic compressor A hermetic compressor includes: a hermetic container having an oil sump defined in a bottom thereof; a frame arranged in the hermetic container and including a hollow portion; a rotating shaft rotatably inserted in the frame to penetrate through the hollow portion, the rotating shaft having an oil channel array ... 01/25/07 - 20070020127 - Hermetic type compressor A hermetic type compressor that includes a cylinder having a compression chamber with a cylinder head coupled to the cylinder to seal the compression chamber. A fastener fastened to the cylinder couples the cylinder head to the cylinder. A fastening hole is formed in the cylinder into which the fastener ... 01/25/07 - 20070020126 - Hermetic compressor A hermetic compressor includes: a hermetic case; a frame configured to be received in the hermetic case, a drive unit and a compression unit arranged at lower and upper sides of the frame, respectively; a rotating shaft mounted to the frame and configured to transmit a rotational force of the ... 01/25/07 - 20070020125 - Motor with eccentric part and pump device using the same In the present invention, without forming a rotational shaft (30) per se in an eccentric manner, the eccentric structure is provided to the whole structure including a ball bearing (50). Accordingly, in place of cutting a side of the rotational shaft (30), the eccentric ball bearing (50) is joined to ... 12/07/06 - 20060275161 - Reciprocating pump with screw actuator A reciprocating pump includes a stationary housing and a travelling housing. The travelling housing is telescopically received within the stationary housing and is movable from a retracted position to an extended position. A screw is provided having a lower end and an upper end. The screw is housed within the ... 12/07/06 - 20060275160 - Pump improvements A pump has a boltless cover that is held on the end of a housing of the pump by only a compressed ring between the cover and the housing. The pump has a flageless valve plate, meaning that the valve plate has no flange through which bolts that secure the ... 12/07/06 - 20060275159 - Pump for fluid supply and method for supplying fluid The present invention includes a fixed member provided the drive motor, drive gear and transmission gear which move an output shaft of the drive motor in concert and a clutch mechanism having a clutch which engages with said gears, a driven gear which is provided at an end portion of ... 12/07/06 - 20060275158 - Refrigerating compressor A refrigerating compressor includes a compressing element and a hermetic container accommodating the compressing element, which includes a compressing chamber where refrigerant gas is compressed, and a suction muffler (118) having a sound deadening space (119) and communicating with the compressing chamber. The suction muffler (118) includes a tail tube ... 12/07/06 - 20060275157 - Electric compressor An electric compressor includes a shaft with a forward leading groove and a reverse leading groove both engraved on its outer wall. When a motor rotates forward, the forward leading groove pumps up lubricant through a centrifugal pump thereby lubricating sliding sections of the compressor. The reverse leading groove has ... 11/30/06 - 20060269428 - Hermetic-type compressor 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 ... 11/16/06 - 20060257274 - Hermetic compressor A hermetic compressor including a housing containing oil and a compression mechanism for compressing a refrigerant gas. In this configuration, a cylindrical piston has under cuts which do not communicate with at least a top surface at a cylinder side of the piston and are formed on an outer circumferential ... 11/02/06 - 20060245954 - Membrane piston pump or piston pump, respectively Membrane piston pump or piston pump, respectively, with a piston guided in a cylinder which acts upon a chamber to which a pump membrane is assigned, which is on its part facing a pump chamber which is connected to an aspirating connection and a pressure connection via valves, a drive ... 11/02/06 - 20060245953 - Hermetic compressor A hermetic compressor capable of reducing vibration and noise caused by an oil-supply capillary tube during operation thereof. The hermetic compressor comprises a hermetic case, a cylinder block to guide reciprocating movement of a piston, a cylinder head coupled to an end of the cylinder block, a valve unit provided ... 11/02/06 - 20060245952 - Structure for an air pump An improvement in the structure for an air pump, and in particular, an air pump, which is sealed to isolate the noise of operation, and the motor body and the cylinder, can be rapidly cooled. The improved air pump employs the circulation of air to the motor so as to ... 10/12/06 - 20060228236 - Actuator assembly An actuator assembly for generating a fluid pressure and applying the fluid pressure to a first device. The actuator assembly comprises a first fluid chamber and a first piston disposed adjacent to the first fluid chamber, a second fluid chamber and a second piston slidably received in the second fluid ... 10/05/06 - 20060222531 - Compound linear motion and rotary actuator To eliminate necessity for rotating a rotation drive mechanism against frictional resistance originated by a sealing portion of a piston when an output shaft is rotated in a component linear motion and rotary actuator. An inside cylinder tube is concentrically provided in an outside cylinder tube and a piston that ... 10/05/06 - 20060222530 - Compressor A compressor includes a motor, side covers, cylinder sets and fans. The motor includes a rotor and a coil at either side. The rotor is provided with blades secured in the coil. Each side cover comprises a side plate. The side plate has air inlets and a rim corresponding to ... 09/28/06 - 20060216168 - Driving device for an air compressor A driving device for an air compressor includes a base, a motor, a main gear, a subordinate gear, a shaft, a weight, and a driving arm combined with an air cylinder and a cylindrical member. When the motor is electrified, the main and the subordinate gear are rotated, with the ... 08/03/06 - 20060171824 - Compressor connecting rod bearing design An improvement to the oil supply grooves in connecting rods for compressors increases surface area in an upper bearing half. The upper bearing half transmits a force from a driveshaft to the connecting rod. The lower half of the connecting rod includes an oil supply groove that extends over the ... 07/20/06 - 20060159569 - Pump device for the hydraulic actuation of a valve Pump device for hydraulically activating a valve in particular used for oil and gas exploration wherein such a valve may be a safety valve assigned to a riser or a tree, said pump device including a piston cylinder unit from which pressurized hydraulic fluid can be pumped in direction to ... 07/13/06 - 20060153710 - Hermetic compressor By adopting a construction in which a first balance weight is provided at the side end portion of the eccentric shaft portion of the auxiliary shaft portion and a second balance weight is provided at the side end portion of the eccentric shaft portion the main shaft portion, it becomes ... 07/06/06 - 20060147326 - Hermetically sealed compressor A hermetically sealed compressor includes a sealed vessel filled with a coolant and a freezer oil, an electromotive element including a rotor and a stator and accommodated within the sealed vessel, and a compressing element accommodated within an upper region of the sealed vessel and adapted to be driven by ... 06/22/06 - 20060133943 - Piston compressor cylinder arrangement, particularly for a hermetically enclosed refrigerant compressor 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 ... 06/15/06 - 20060127248 - Air pump An air pump includes a body being composed of two semi-housings. A sleeve is received in an opening at a top of the body. A rim is formed at a top of the sleeve and an annular recess is defined at a bottom of the sleeve. By fasteners through the ... 05/25/06 - 20060110270 - Rotation shaft, feeding device, motor and manufacturing method for rotation shaft A rotation shaft includes a spiral groove for feeding which is formed on the outer peripheral face of the rotation shaft and a plurality of fine recessed parts which is formed on a flank surface of the spiral groove. The rotation shaft may be manufactured by a spiral groove forming ... 05/25/06 - 20060110269 - Discharge tube of a hermetic compressor A mounting arrangement for a discharge tube of a hermetic compressor of the type which comprises: a hermetic shell (1) presenting a gas outlet (1a) and lodging a cylinder block (10) in which is affixed, through screws (8a), a cylinder head (8) defining, internally, a gas discharge chamber, and a ... 05/18/06 - 20060104838 - Integrated eccentric flywheel oil slinger An integrated eccentric flywheel oil slinger for an oil lubricated compressor crankcase. In an exemplary embodiment, the integrated eccentric flywheel oil slinger includes a generally cylindrical main body being configured to provide oil to components of the compressor crankcase and to reduce vibrations caused by such components. The generally cylindrical ... 05/18/06 - 20060104837 - Air compressor shroud assembly The present invention generally relates to the field of air compressors and particularly to a shroud assembly for use with air compressors. An aspect of the present invention is directed to a shroud assembly having an outfit shroud, including a top outfit shroud coupled with a bottom outfit shroud; and, ... 05/11/06 - 20060099090 - Internal leakage control and venting for abs unit A housing block for a hydraulic unit of a vehicle brake system that retaining a piston pump and an eccentric element that rotates the piston. A motor drives the eccentric element within an eccentric chamber. The block has a cylindrical cavity within a hydraulic leakage reservoir and a fluid leakage ... 05/04/06 - 20060093494 - Rotary hermetic compressor and refrigeration cycle system A vane of a first cylinder is compressed and urged by a spring member. A vane of a second cylinder is compressed and urged corresponding to a differential pressure between an intra-casing pressure guided into a vane chamber and a suction pressure or discharge pressure guided to the cylinder chamber. ... 04/20/06 - 20060083641 - Energy dissipation valves for hydraulic cylinders A hydraulic actuator comprises a cylinder, a piston reciprocatingly received within the cylinder, a piston rod connected to the piston and a pressure release mechanism which allows hydraulic fluid to pass from a first side of the piston to a second side of the piston when the actuator encounters shock ... 04/20/06 - 20060083640 - Energy dissipation valves for hydraulic cylinders A hydraulic actuator comprises a cylinder, a piston reciprocatingly received within the cylinder, a piston rod connected to the piston and a pressure release mechanism which allows hydraulic fluid to pass from a first side of the piston to a second side of the piston when the actuator encounters shock ... 04/06/06 - 20060073038 - Cam arrangement and fuel pump arrangement incorporating a cam arrangement A cam arrangement for use with a high pressure fuel pump arrangement for delivering fuel to an associated engine, the cam arrangement including at least two cams (28) that are mounted, in use, upon an engine camshaft and each of which is arranged to drive a respective pumping plunger (16) ... 04/06/06 - 20060073037 - Amplifier assembly The invention concerns a pressure amplifier that includes a low pressure inlet for supplying a medium at low pressure, a low pressure piston with a first operational area and at least one high pressure piston with a second operational area, the second area being smaller than the first area, and ... 03/30/06 - 20060067841 - Fluid machine The present invention provides a fluid machine that is capable of reducing noise generated when a fluid such as compressed air passes through a discharge port and that is capable of preventing premature breakage of a discharge valve. The fluid machine comprises a cylinder head 37 that is connected to ... 03/16/06 - 20060057000 - Reciprocating compressor A reciprocating compressor comprises a reciprocating motor (30) disposed in a casing (10), and generating a driving force; a compression unit (40) for sucking, compressing, and discharging gas by the driving force of the reciprocating motor (30); a resonant spring unit (50) for providing a reciprocating movement of the reciprocating ... 03/02/06 - 20060045769 - Pump jack An electromagnetic ram for use in artificially lifting fluid from a well and in particular an oil well. The disclosure also teaches a method and system employing the ram. The use obviates existing systems used today in terms of cost, environmental concerns, optimized mechanical efficiencies and maximizing overall production of ... 03/02/06 - 20060045768 - Oil-less air compressor An oil-less air compressor mainly includes a motor, a crankcase, and a piston rod moving in the crankcase in rotary motion for external air to enter the crankcase via an air inlet thereof and be discharged from an air cylinder via an air outlet thereof into an external air tank. ... 03/02/06 - 20060045767 - Method and apparatus for removing liquids from wells A method and pump apparatus for removing formation fluids from a “liquid loaded” gas well is provided. The pump apparatus is adapted to be positioned downhole a well and is hydraulically operated to lift formation fluid, such as water from the well to “unload” the well and reestablish gas production. ... 02/23/06 - 20060039808 - Refrigerant compressor A valve plate includes a plurality of suction holes and a plurality of suction reed valves for opening and closing them. At least two of these suction reed valves have different natural frequencies. In this configuration, a natural frequency of one reed valve is larger. Therefore, even when an operation ... 02/23/06 - 20060039807 - Electrically powered compressor A compressor includes a motor driven by a controller and having a rotor and a stator, a compressing unit driven by the motor in a hermetic container in which refrigerant is filled. Driving the motor at a low rpm, the controller practices a feedback control which determines a timing of ... 02/09/06 - 20060029502 - System, method, and apparatus for valve stop assembly in a reciprocating pump A reciprocating pump assembly has a pump housing with a crankshaft. A plunger is connected to the crankshaft for pumping a fluid through a cylinder. The cylinder has a fluid inlet port and an opening that provides access to the cylinder. A suction cover is mounted in the opening and ... 02/02/06 - 20060024180 - Fluidic compressor A compressor system that is configured to compress the fluid from low pressure source to a higher pressure magnitude is powered from the same low pressure fluid source. The compressor system includes two piston assemblies that are coaxially coupled to one another, and that are of differing cross sectional areas. ... 01/19/06 - 20060013711 - Hermetic compresssor Outer circumferential shape of a balance weight is composed so that the distance between the outer circumference of the balance weight and the piston is substantially constant in the closely approaching interval of the balance weight and piston. ... 01/12/06 - 20060008365 - Integrated pump and check valve apparatus A pump apparatus is provided which comprises a displacement pump and a check valve apparatus. The displacement pump comprises a reciprocating piston within a housing having an interior wall spaced apart from the piston. The check valve apparatus comprises two check valves that control fluid flow under pressure exerted by ... 12/15/05 - 20050276705 - Positive displacement pump having piston and/or liner with vapor deposited polymer surface A metering pump for providing relatively small, precise volumes of fluid is provided. The pump piston and/or the interior of the cylinder has a surface finish exhibiting a roughness average within selected limits and a vapor deposited polymer such as polytetrafluoroethylene. A drive mechanism is provided for simultaneously rotating and ... 12/01/05 - 20050265863 - Hermetic compressor Relating to oil feed to a piston portion in a dual support bearing of a hermetic compressor, and a structure for improving efficiency and reliability and accomplishing reduction of noise is disclosed. In this structure, since an auxiliary bearing 119 is provided with an oil feed passage 129 for conducting ... 11/24/05 - 20050260085 - Dry-running reciprocating vacuum pump A dry-running reciprocating vacuum pump includes at least one pump stage located in the housing and including a cylinder having at least one gas inlet, a gas outlet, and a piston reciprocating in the cylinder and controlling the at least one inlet, a drive system for driving the piston-driving shaft, ... 11/24/05 - 20050260084 - Vaccinator device An automatic repeater vaccinator apparatus (10) for dispensing a predetermined volume of a fluid into an animal, particularly a fluid which is a vaccine, and reloading after each volume of fluid is dispensed. The apparatus (10) comprises a handheld syringe (100) for dispensing the fluid, a flexible conduit (12) for ... 11/24/05 - 20050260083 - Linear motor and linear compressor having the same A linear compressor comprising a linear motor. The linear motor comprises an outer core fixed to a cylinder block in such a fashion that it is spaced apart from a piston to surround it, a coil for producing a magnetic field by receiving electric power, and an inner core assembly ... 11/17/05 - 20050254972 - Bench top pump A modular, expandable, no-tools pump assembly having precise computer control for controlling dispensing volumes and flow characteristics of the dispensed fluid. ... 11/10/05 - 20050249616 - Cam-driven pump mechanism for a battery-powered grease gun A cam-driven pump mechanism for a battery-powered grease gun includes a cam driver and a cam-driven pump. The grease gun has a transition body having a grease channel and a casing having an inner chamber. The cam driver is mounted in the inner chamber. The cam-driven pump has a cylindrical ... 11/10/05 - 20050249615 - High pressure reciprocating pump A stuffing box for a high-pressure, reciprocating pump. A high pressure reciprocating pump has a mounting plate secured to the plunger end of a pump drive housing and a suction and discharge manifold hingedly connected thereto. A stuffing box in an opening in the mounting plate has a central bore ... 11/03/05 - 20050244289 - Fluid subdividing and filling device, and piston and clamp used in the same A fixing member is fixed on a structure for moving a piston forward and backward. Piston clamps rotatably face the fixing member, and an elastic body biases the piston clamps forward. A holding unit for holding detachably the rear end of the piston shaft is formed on both ends of ... 10/27/05 - 20050238508 - Air displacement apparatus for use with a fluid transfer device A liquid sealed air displacement apparatus may be used in a fluid transfer device to transfer volumes of fluid. The air displacement apparatus may include a piston and a cylinder defining a displacement chamber for receiving the piston. The air displacement apparatus may be used to displace precise volumes of ... 10/27/05 - 20050238507 - Fluid delivery device A fluid delivery device may include a fluid driving mechanism for driving fluid out of a reservoir and an actuating mechanism for actuating the driving mechanism. The fluid delivery device may also include one or more sensors for monitoring operation of the fluid delivery device. The fluid delivery device may ... 10/20/05 - 20050232792 - High-pressure small volume pump adjustable dead space and therefore adjusting capability of the pulsation freedom through a displacement chamber provided with an adjustable opposed piston (58); and seals compensating construction tolerances by a combination of a cambered sealing surface and a conical sealing surface. ... 10/13/05 - 20050226744 - Three-shift lifting mechanism for jack or the like The load dependent, variable displacement, at least three-shift hydraulic mechanism includes a hydraulic device disposed at the front side of a valve block and adapted to move a ram piston oriented such as to raise weight, the hydraulic device defining an oil accumulation chamber, a rapid-lifting oil chamber for rapid ... 10/06/05 - 20050220639 - Extrusion-type liquid delivery apparatus An extrusion-type liquid delivery apparatus according to the present invention comprises: a plunger mover to move a plunger; a plunger mover driver to move the plunger mover; a pair of hooks rotatably mounted on the plunger mover with the bent ends projecting from the plunger mover, and having slopes at ... 09/29/05 - 20050214139 - Liquid delivery pump for liquid chromatograph A liquid delivery pump includes a pump room for transferring liquid, a plunger having one end located in the pump room for moving reciprocally therein for delivering the liquid in the pump room, and a base end, and a crosshead for reciprocal movement situated adjacent to the pump room and ... 09/01/05 - 20050191191 - Linear actuator, and pump device and compressor device using the same A linear actuator includes a driving part provided with an inner yoke and an outer yoke, a magnet disposed between the inner yoke and the outer yoke, and a movable body which is to be driven to reciprocate in the axial direction. The driving part includes a coil for generating ... 08/11/05 - 20050175480 - Yoke mechanism for compressor A yoke structure for a compressor is disclosed, which is applied to a scotch yoke type reciprocating compressor. The yoke structure comprises a crankshaft (10); a crankpin (20) connected to the crankshaft (10), to rotate along a predetermined round trajectory which has the crankshaft at its pivot, as the crankshaft ... 07/28/05 - 20050163635 - Resonant arrangement for a linear compressor A resonant arrangement for a linear compressor, comprising a non-resonant assembly formed by a motor and a cylinder (1); a resonant assembly formed by a piston (2) reciprocating inside the cylinder (1); an actuating means (3) operatively coupling the piston (2) to the motor, and at least one spring means ... 07/21/05 - 20050158192 - Metering pump A metering pump, especially for feeding fuel to a vehicle heater, comprising a delivery plunger (50), which can be moved to and fro for delivering liquid medium, a guide sleeve (42), which partially accommodates the delivery plunger (50) and guides same for the reciprocating movement, wherein the guide sleeve (42) ... 07/21/05 - 20050158191 - Highly accurate pumping device A highly accurate pumping device for aspirating and dispensing variable volumes of fluid is presented. The pumping device comprises a housing with a slotted optical sensor, a stepper motor with a fine pitch lead screw, a coupling linking the stepper motor shaft and the lead screw, an anti-backlash nut, an ... 07/07/05 - 20050147508 - Methods and apparatus for determining the presence or absence of a fluid leak Embodiments of the present invention feature a method and apparatus for detecting defects, such as, leaks, component failure and adverse performance. One embodiment of the present apparatus for pumping fluid comprises a pumping chamber having an inlet and an outlet powered by a motor. The motor operates in pumping mode ... 06/30/05 - 20050142007 - Apparatus for preventing abrasion in reciprocal compressor The present invention discloses an apparatus for preventing abrasion in a reciprocal compressor, including a cylinder, a reciprocal motor having a stator and a mover, and generating a linear reciprocation driving force, a piston inserted into an inside space of the cylinder to be linearly movable, a piston rod coupled ... 06/09/05 - 20050123421 - Compressor motor-end bearing having oil leakage path A compressor includes a motor having a rotor for driving a shaft, to drive compressor pistons. A lubricant supply system supplies lubrication to the moving elements within the compressor and motor. A suction fluid to be compressed passes over the motor on its way to the compression chambers. The oil ... 06/02/05 - 20050118043 - Unit utilizing current to control reciprocation for pushing fluids A unit utilizing current to control reciprocation for pushing fluids, including a chamber, a magnet, a coil connected with a circuit, a first inlet, a first outlet, a second inlet, a second outlet, a first valve and a second valve. The magnet is slidably disposed in the chamber. The coil ... ### FreshPatents.com Support |