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9017044 Electromagnetic pump  
An electromagnetic pump including a reciprocating piston in a cylinder; an electromagnetic portion that moves the piston forward; a first biasing member that moves the piston backward; a support...
9011114 Medical fluid delivery sets and related systems and methods  
This disclosure relates to medical fluid delivery sets and related systems and methods. In some aspects of the invention, a medical fluid cassette includes a plunger slidably disposed within a...
9004883 Low noise high efficiency solenoid pump  
A low noise, high efficiency solenoid pump includes a housing containing a hollow electromagnetic coil. Within the coil resides a pump assembly defining a tubular body having a pair of opposed...
9004879 Discrete heat-insulated exhaust muffler device and refrigeration compressor using same  
A discrete, heat-insulating exhaust muffler device (8) and a refrigeration compressor using the exhaust muffler device are provided. The exhaust muffler device (8) includes a metal cavity body...
8998589 Linear compressor  
The linear compressor comprises a shell (10) which affixes a cylinder (20) defining a compression chamber (21) housing a piston (30); a linear electric motor (40) having a fixed part (41) affixed...
8985968 High pressure pump with pressurizing chamber enclosed within cylinder inserted into housing  
A cylinder is configured into a bottomed tubular form and includes an inner peripheral wall, an inner bottom wall, an outer peripheral wall and an intake hole and a discharge hole. The inner...
8974202 Device for processing an edible product  
The invention relates to a device for processing an edible product in the form of a viscous to pasty mass, in particular, an edible product based on a fatty mass, such as chocolate, or based on...
8955582 Beamless mechanic-reversing long stroke pumping unit  
A beamless mechanic-reversing long stroke pumping unit is provided for petroleum production in diverse types of oil fields. Its mechanic-reversing system consists of differentials, brakes, etc....
8939737 Infusion device with a grooved piston channel wall  
An apparatus for delivering a fluid includes a housing, an inlet in the housing for receiving the fluid, and an outlet in the housing for discharging the fluid. A piston channel is provided within...
8932269 Disposable pumping system and coupler  
A coupling system for receiving a push rod includes a housing defining an internal channel having a sloped wall, and a piston received within the internal channel. The piston includes at least one...
8926333 Device, system, and method for simulating blood flow  
A device for simulating blood flow including an anatomical unit and a waveform generator for generating waveforms. The waveform generator includes a pump capable of pumping a fluid through at...
8920146 Pump system  
A pump system configured to deliver drilling fluid in at least one of a driving well and a drilling well includes a pump unit, a rotary drive device configured to drive the pump unit, and a...
8876497 Linear compressor  
A linear compressor is provided that includes a cylinder having a compression space for refrigerant therein, a piston that linearly reciprocates inside the cylinder in an axis direction to...
8850845 Portable cooling unit  
A portable cooling unit comprising a magnetic spiral vapor pump that utilizes a magnetic pulse between two electromagnets and spiral drive slots to pull a piston back-and-forth 180-degrees and...
8845222 Modular paint pump for a paint roller  
A modular paint pump for a paint roller having a battery operated pump in a housing supporting a paint can. A wetted parts subassembly is manually removable for cleaning or service without the use...
8834137 Primer bulb  
A pump includes a substantially tubular housing having an inlet end and an outlet end and defining a central axis and a chamber within the body portion, and a movable valve assembly slidably...
8821131 Air compressor  
According to the invention, an air compressor includes: one pair of air tanks arranged parallel to each other by being separated from each other in a constant interval, for storing thereinto...
8814539 Hermetic compressor  
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...
8794933 Hermetic compressor  
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...
8770951 Air pump  
An air pump structured to facilitate the installation of a pair of pistons includes a casing (17) having a pair of cylinder chambers (14) slidably accommodating a pair of pistons (16),...
8770950 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...
8764416 Closed type compressor  
A closed type compressor of a low overall height and small vibrations provided with a structure comprising a balancing weight (142) formed of a first balancing weight (146) and a second balancing...
8747083 Air compressor having enlarged compartment for receiving pressurized air  
An air compressor includes a cylinder housing, an outlet receptacle disposed on the cylinder housing, and a partition formed between the cylinder housing and the outlet receptacle and having an...
8746093 Oil pumping unit  
A crank-type non-beam pumping unit, including a belt, a foundation, a crown sheave, a frame, a support rod, a belt pulley, a pin shaft, a crank, a transmission shaft, and a bracket. The bottom of...
8740585 Hermetic compressor  
A hermetic compressor is provided that is capable of supplying oil even in a low-speed operation. The hermetic compressor includes a hermetic container filled with oil in a base thereof, a...
8734120 Compressor starting method and apparatus  
A piston type compressor wherein the position of the piston highest pressure point is indicated and the rotor of the motor at the optimal starting angle aligned prior to the actual compression...
8726679 Dedicated pulsing valve for compressor cylinder  
A reciprocating piston compressor for use in a refrigerant compression circuit comprises first and second intake manifolds, first and second reciprocating piston compression units, an outlet...
8727749 Cranked rod pump method  
An improved method is provided, for pumping fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, through use of a cranked rod pumping (CRP) apparatus for...
8721304 Sealed compressor  
A hermetic compressor includes a thrust ball bearing (176) on the thrust face (160) of the main bearing (126). The thrust ball bearing (176) includes balls (166) held in a holder (168), an upper...
8714945 Ultra-low friction air pump for creating oscillatory or pulsed jets  
An air pump positioned within a hollow space in an aerodynamic structure for controlling the flow over an aerodynamic surface thereof, includes a movable member linearly displaced by a very low...
8702400 Surface motor direct-drive sucker-rod screw pump device  
A surface motor direct-drive sucker-rod screw pump device is driven by a vertical three-phase permanent magnet brush-less DC motor, and comprises a motor controller (6), a rectifying circuit, an...
8684706 Connecting rod for a linear compressor  
A linear compressor has a hollow piston with crown and sidewall. The piston reciprocates in a cylinder. A piston rod connects the piston to a spring. A connection between the piston rod and the...
8678789 Refrigeration compressor with flexible discharge conduit  
A refrigeration compressor includes a housing having a suction gases inlet and a compressed gases outlet. A linear compressor is supported for operation within the housing. A compressed gases...
8678788 Linear compressor  
A linear compressor is provided. Unnecessary parts of a motor cover of the compressor are bent toward a rear cover in an axis direction to form supporting ends of the motor cover, and the...
8668470 Offset valve bore for a reciprocating pump  
A fluid end 15 for a multiple reciprocating pump assembly 12 comprises at least three plunger bores 61 or 91, each for receiving a reciprocating plunger 35. Each plunger bore has a plunger bore...
8668475 Linear rod pump apparatus and method  
An apparatus and method for pumping fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, include a linear rod pump having a mechanical rack and pinion drive...
8662865 Offset valve bore in a reciprocating pump  
A fluid end (15) for a multiple reciprocating pump assembly (12) comprises at least three plunger bores (61 or 91) each for receiving a reciprocating plunger (35), each plunger bore having a...
8662864 Offset valve bore in a reciprocating pump  
A fluid end (15) for a multiple reciprocating pump assembly (12) comprises at least three plunger bores (61 or 91) each for receiving a reciprocating plunger (35), each plunger bore having a...
8657587 End of stroke detection for electromagnetic pump  
Detection of end of stroke for an electromagnetic pump may be performed using, for example, a calculated first flux derivative. Further, inductance of a coil that can be energized to produce a...
8641390 Linear rod pump apparatus and method  
An apparatus and method for pumping fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, include a linear rod pump having a mechanical rack and pinion drive...
8575816 Coolant compressor  
A refrigerant compressor has a compressor housing in which a cylinder housing and an electric motor are fastened to one another. The electric motor includes a stator provided with a stator bore,...
8555984 Linear rod pump operating method  
A method for operating a linear rod pump to pump fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, include a linear rod pump having a mechanical rack and...
8550149 Water-cooled heat sink  
A water-cooled heat sink includes a base, a box, a propelling module, a driving module, and a plurality of conduits. The box is disposed above the base, and receives a cooled liquid. The driving...
8454328 Multiplex reciprocating pump  
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...
8449474 Self-actuated cylinder and oscillation spirometer  
A self-actuated cylinder comprising a cylinder housing comprising electro-magnetic force generating means to generate electro-magnetic forces, and a piston within the cylinder housing, wherein the...
8435017 Hermetic compressor and refrigeration system  
A valve plate includes a suction port to which gas to be compressed in a compression chamber flows in and a discharge port from which gas compressed in the compression chamber is discharged, a...
8430650 Reciprocative compressor  
A swing-type reciprocative compressor is capable of maintaining long durability and preventing propagation of heat to the large end portion of a piston, even under high-compression. In the...
8428846 Electronic oil pump  
An electronic oil pump has at least one lubricant inlet, at least one lubricant outlet, at least one piston being movable between a full stroke position and a fully retracted position, an...
8419388 Coolant compressor  
A coolant compressor (1), comprising a piston-cylinder unit (2) that compresses a coolant, said piston-cylinder unit comprising a cylinder housing (4) and a piston (3) held in a piston bore (5) of...
8414535 Miniature pump device and method  
A miniature pump device, with a fluid reservoir that can contain an intravenous drug, hydraulic fluid, or the like. The miniature pump has a motor disposed adjacent the fluid reservoir, and a...