Abstract: A crude oil production equipment includes a submersible pump coupled with a driving shaft, a linear motor, an oil pipe, a well casing, a filter pipe, an outer passage, an inner tube, an upper valve ball, a piston and a lower valve ball. During down stroke of the driving shaft, a suction force is produced to suck crude oil from the well casing into the upper chamber of the inner and the piston forces crude oil out of the lower chamber of the inner tube into the inner passage and then the outlet of the oil pipe. During up stroke of the driving shaft, the piston forces crude oil out of the upper chamber into the lower chamber, and the driving shaft enters the upper chamber and the lower chamber to force crude oil out of the lower chamber out of the oil outlet of the oil pipe.

Abstract: An oil-pumping system includes a pumping-well unit, a controller composed of a main control circuit, a power converter, a current sensor and a position sensor, a switched reluctance motor mounted at the pumping-well unit and electrically coupled to the controller, a casing connected to the pumping-well unit, an oil suction pipe mounted in the casing, a pumping rod disposed in the oil suction pipe and connected to the switched reluctance motor, and a screw pump connected to the pumping rod in the oil suction pipe.

Abstract: A crude oil production equipment includes a submersible pump coupled with a driving shaft, a linear motor, an oil pipe, a well casing, a filter pipe, an outer passage, an inner tube, an upper valve ball, a piston and a lower valve ball. During down stroke of the driving shaft, a suction force is produced to suck crude oil from the well casing into the upper chamber of the inner and the piston forces crude oil out of the lower chamber of the inner tube into the inner passage and then the outlet of the oil pipe. During up stroke of the driving shaft, the piston forces crude oil out of the upper chamber into the lower chamber, and the driving shaft enters the upper chamber and the lower chamber to force crude oil out of the lower chamber out of the oil outlet of the oil pipe.

Abstract: Connected to a 3-phase linear motor of a submersible oil pump of a crude oil production system, a linear motor automatic control circuit assembly is disclosed to include a linear motor power supply circuit, a CPU, an insulated gate bipolar transistor driving circuit, a current detection circuit, a temperature sensor, a fluid depth sensor, a function setting and status display circuit, and a circuit assembly power supply circuit for controlling the operation speed of the linear motor subject to the submergence depth of the linear motor in the oil well.

Abstract: A mover stabilizing and stator cooling arrangement includes an upper sleeve surrounding the mover of the linear motor, a lower sleeve, a thermoconducting sleeve surrounding the stator and axially connected between the upper sleeve and the lower sleeve. The arrangement further includes a thermal grease filled in the space defined between the upper sleeve and the mover, the space defined between the thermoconducting sleeve and the stator, and the space defined between the lower sleeve and the outer tube for quick dissipation of waste heat. A stabilizer ring is set between the upper sleeve and the mover to stabilize axial movement of the mover. A piston and multiple one-way valve sets are mounted in the space between the lower sleeve and the outer tube for allowing adjustment of the volume in the thermoconducting sleeve responsive to expansion/contraction of the thermal grease due to temperature changes.

Abstract: A mover stabilizing and stator cooling arrangement includes an upper sleeve surrounding the mover of the linear motor, a lower sleeve, a thermoconducting sleeve surrounding the stator and axially connected between the upper sleeve and the lower sleeve, a thermal grease filled in the space defined between the upper sleeve and the mover and the space defined between the thermoconducting sleeve and the stator and the space defined between the lower sleeve and the outer tube for quick dissipation of waste heat, a stabilizer ring set between the upper sleeve and the mover to stabilize axial movement of the mover, and a piston and multiple one-way valve sets mounted in the space between the lower sleeve and the outer tube for allowing adjustment of the volume in the thermoconducting sleeve subject expansion/contraction of the thermal grease during temperature change.

Abstract: A vibration machine includes a base, a vibration plate suspending above the base for supporting a person, a supplementary shaft fixedly mounted on the center of the bottom side of the vibration plate, a plurality of axle housing elements fixedly mounted on the base around the supplementary shaft, a plurality of spring members vertically connected between the vibration plate and the base and spaced around the axle housing elements, and a DC linear motor surrounded by the axle housing elements on the base for moving the supplementary shaft and the vibration plate alternatively up and down relative to the base.

Abstract: Connected to a 3-phase linear motor of a submersible oil pump of a crude oil production system, a linear motor automatic control circuit assembly is disclosed to include a linear motor power supply circuit, a CPU, an insulated gate bipolar transistor driving circuit, a current detection circuit, a temperature sensor, a fluid depth sensor, a function setting and status display circuit, and a circuit assembly power supply circuit for controlling the operation speed of the linear motor subject to the submergence depth of the linear motor in the oil well.

Abstract: An oil pumping unit is disclosed to include a motor, which has a mover that moves alternately up and down when the motor is electrically connected, and a pump, which has a barrel, an oil suction pipe mounted in the barrel, an inner sleeve, which is connected to the suction pipe and has installed therein a mixing valve, a movable valve and a piston, a bottom one-way oil intake valve, and a one-way mixing flow intake valve respectively arranged in such a manner that when the mover is operated to reciprocate the oil suction pipe, crude oil is alternately pumped through the one-way bottom oil intake valve and the one-way mixing flow intake valve to alternately pass through the movable valve and the mixing valve to the ground.

Abstract: An oil pumping unit is disclosed to include a motor, which has a mover that moves alternatively up and down when the motor is electrically connected, and a pump, which has a barrel, an oil suction pipe mounted in the barrel, an inner sleeve, which is connected to the suction pipe and has installed therein a mixing valve, a movable valve and a piston, a bottom one-way oil intake valve, and an one-way mixing flow intake valve respectively arranged in such a manner that when the mover is operated to reciprocate the oil suction pipe, cruel oil is alternatively pumped through the one-way bottom oil intake valve and the one-way mixing flow intake valve to alternatively pass through the movable valve and the mixing valve to the ground.

Abstract: An air compressor control system is constructed to include a motor, an accumulation tank, a pump, a pressure switch, a pressure control valve, and a micro-controller. When the pressure of the accumulation tank surpassed a predetermined high level, the pressure switch is off, thereby causing the micro-controller to open the pressure control valve for relieving forced air pressure and then to turn off the motor. When the pressure of the accumulation tank dropped below the predetermined low level, the pressure switch is switched on, thereby causing the micro-controller to provide power supply to the motor again and then to close the air pressure control valve for enabling forced air to be pumped into the accumulation tank by the pump after the motor has been fully started.

Abstract: An air compressor control system is constructed to include a motor, an accumulation tank, a pump, a pressure switch, a pressure control valve, and a micro-controller. When the pressure of the accumulation tank surpassed a predetermined high level, the pressure switch is off, thereby causing the micro-controller to open the pressure control valve for relieving forced air pressure and then to turn off the motor. When the pressure of the accumulation tank dropped below the predetermined low level, the pressure switch is switched on, thereby causing the micro-controller to provide power supply to the motor again and then to close the air pressure control valve for enabling forced air to be pumped into the accumulation tank by the pump after the motor has been fully started.

Abstract: A refrigerating compressor control circuit installed in a refrigerator and connected between AC power supply and the compressor motor of the refrigerator and adapted for controlling the operation of the compressor motor, the refrigerating compressor control circuit including a CPU (central processing unit), a current phase detector, a voltage phase detector, a trigger circuit having a TRIAC, a voltage level detector, a high current detector, a low current detector, an input filter, and an output filter. The CPU starts the compressor motor a length of time delay after a sudden shutdown, preventing damage to the compressor motor due to high pressure of cooling agent, and controls the output voltage value subject to the status of the load at the compressor motor.

Abstract: A refrigerating compressor control circuit installed in a refrigerator and connected between AC power supply and the compressor motor of the refrigerator and adapted for controlling the operation of the compressor motor, the refrigerating compressor control circuit including a CPU (central processing unit), a current phase detector, a voltage phase detector, a trigger circuit having a TRIAC, a voltage level detector, a high current detector, a low current detector, an input filter, and an output filter. The CPU starts the compressor motor a length of time delay after a sudden shutdown, preventing damage to the compressor motor due to high pressure of cooling agent, and controls the output voltage value subject to the status of the load at the compressor motor.

Abstract: A signal adapter including a first circuit board adapted to process wired TV signal and telephone signal from a first coaxial cable; a first casing holding the first circuit board at its one side and having a plurality of connectors at its opposite side adapted to transmit processed signal from the first circuit board to end users; a first cover fastened to the first casing and covered over the first circuit board, having a main signal input port through which wired TV signal and telephone signal are transmitted from a coaxial cable to the first circuit board, and a main signal output port through which wired TV signal and telephone signal are transmitted from the first circuit board to a next signal adapter through a second coaxial cable; a second circuit board adapted to provide the necessary telephone signal working power supply to the first circuit board; a second casing extended from one side of the first casing and adapted to hold the second circuit board on the inside; and a second cover fastened to th