20808 results about "Motor shaft" patented technology

A surgical instrument having a locking mechanism for preventing an output shaft of the surgical instrument from rotating and a further locking mechanism for mounting a battery pack to a distal end of a housing of the surgical instrument. The surgical instrument further includes a clutch mechanism for limiting the torque of a drive shaft of the surgical instrument. The locking mechanism for preventing the output shaft from rotating includes a locking switch which mates with a locking cap disposed on the output shaft. The locking mechanism for mounting the battery pack to the housing includes a groove at the distal end of the housing and a retaining ring which engages the groove when the battery pack is mounted on the housing. The clutch mechanism includes a clutch plate that interfaces with both the output shaft and the drive shaft and prevents failure of the motor shaft.

A radiofrequency thermal balloon catheter uniformly heats tissues in contact with the balloon to achieve thermotherapy such as ablation or hyperthermia safely and properly for a diseased part. The radiofrequency thermal balloon catheter includes a catheter (4) having an outer shaft (2) and an inner shaft 3 extended through the outer shaft so as to be slidable relative to the outer shaft, an inflatable balloon (6) capable of being inflated so as to be in contact with a target lesion (18) and provided between respective front end parts of the outer and the inner shaft, and a radiofrequency electrode (8) extended in a wall of the balloon or inside the balloon to be used for radiofrequency energy supply in combination with a counter electrode (53). The counter electrode is disposed at a predetermined position, for example, inside the balloon, in the wall of the balloon, in a position neighboring the balloon or on the patient's body surface. A lead wire (10) electrically connects to the radiofrequency electrode. A temperature sensor (12) is capable of sensing temperature of a liquid contained in the balloon. A temperature distribution uniformizing device (14) uniformizes the temperature distribution in the liquid contained in the balloon.

An improved system for monitoring vibration of an electric machine is disclosed. According to one embodiment, sensors are positioned in a plane orthogonal to the motor shaft and each sensor detects vibration along at least one axis of the motor. The sensors are oriented such that the polarity of each sensor is reversed. The pairs of sensors may be used to isolate specific vibrations within the motor. According to another embodiment, a sensor may be mounted directly to the motor shaft. The sensor on the motor shaft directly detects vibrations along the motor shaft. Optionally, a second sensor may be mounted to a fixed location within the motor housing, and the combination of the sensor on the motor shaft and the sensor at a fixed location may be used to isolate specific vibrations within the motor. A motor controller may adjust operation of the motor to reduce the isolated vibration.

A pipette station is described for use in the field of sample analysis. The pipette station increases the rate and ease with which a liquid may be manipulated into and out of sample carriers such as microwell plates. The pipette station includes shafts in the X, Y, and Z direction which possess ball screws which are integrated with motor shafts thus improving accuracy and eliminating the need for a coupling apparatus thereby reducing the space required for the pipette station. The pipette station may be interfaced with an automated laboratory system.

Improved components for a molten metal pump include a coupling for connecting a rotor shaft to a motor shaft, a rotor shaft and a rotor. The rotor shaft has a first end and a second end wherein the first end optionally has a vertical keyway formed in the outer surface of the shaft. The second end optionally has flat, shallow threads. The coupling can be one-piece or multi-piece, includes a cavity for receiving the first end of the rotor shaft and, if the first end of the rotor shaft has a keyway, the coupling includes a projection in the cavity for being received at least partially in the keyway. The rotor includes a connective portion that connects to the second end of the rotor shaft. If the second end of the rotor shaft includes flat, shallow threads, the connective portion is essentially a bore having flat, shallow threads configured to receive the second end of the rotor shaft. Optionally, the first end of the rotor shaft may have flat, shallow threads in which case the coupling would have a cavity that receives the first end of the rotor shaft, wherein the cavity has flat, shallow threads.

A motor driven assembly includes a motor having a motor shaft mounted for rotation about a rotational axis and a rotor radially located about the shaft. The motor drives a compressor that receives air from the motor, compresses the air, and circulates the compressed air to a space. The motor includes a first cooling flow passage and a second cooling flow passage that each receive air to provide internal cooling of the motor. A portion of the air compressed in the compressor is diverted from the compressor to a heat exchanger. The heat exchanger cools the compressed air from before the air circulates into the first cooling flow passage to cool the motor. The second cooling flow passage receives air from the environment surrounding the motor driven assembly to further cool the motor.

A blower assembly comprises a blower housing having a stator assembly integrally formed therewith. The stator assembly includes a stator bore having a rotor magnet rotatable therewithin such that the motor assembly is configured as a brushless D.C. motor. An impeller is mounted on a motor shaft of the motor assembly and has a plurality of vanes extending upwardly therefrom. Each one of the vanes has a vane height which is optimized to minimize the formation of fluid eddy losses during compression of air by the impeller. A bearing assembly rotatably coupling the rotor magnet to the stator assembly is sized and configured to maintain an air gap of approximately 0.0002 inches between the vanes and a housing interior surface of the blower housing during rotation of the impeller.

An air purifier for removing particles from air and providing an aesthetically pleasing appearance includes a housing having an air inlet, an air outlet and an airflow path therethrough. An air filter is mounted within the housing in the airflow path and a motor is mounted within the housing. The motor includes a motor shaft and a fan is mounted to the motor shaft for urging air into the air inlet, through the airflow path and out of the air outlet. An air cowl is removably mounted to the housing. The air cowl includes a peripheral edge. The air inlet or the air outlet is defined between the peripheral edge and the housing. A method of operating the air purifier with the inlet or outlet formed between the peripheral edge and the housing is also disclosed.

A grounding brush for mitigating static electric charge on a motor shaft includes a plurality of filaments secured to an annular frame around the shaft, with tips of the filaments disposed in a channel defined by the frame. Conductive powder can be provided in the channel to improve current flow from the shaft to the filaments.

An electric motor has an internal ferromagnetic rotor ring and an external stator. Circumferentially distributed cutouts in the rotor receive rectangular permanent magnets each having a width b and height h and the rotor ring is divided into rotor poles. The height h forms the longer side of each magnet and is radial to the motor axis. The magnets are magnetized in the width b direction with like poles oriented toward one another. A magnetic clearance is located between adjacent magnets for each inner portion of a rotor pole. The clearance does not contain magnetic material and in a center region of the rotor poles one support web connects an inner support ring with the particular rotor pole to provide mechanical support.

A motor unit comprises a housing for containing a motor, a motor shaft for receiving a motor provided driving force, a torque sensor mechanism for detecting torque, and a controller for controlling power to the motor in response to a detected amount of torque. An actuator couples the torque sensor to a sensor of the controller. The actuator is configured to move relative to the controller sensor thereby causing the sensor to produce a signal indicative of the detected level of torque. The controller is contained within the housing of the motor. The motor unit may also have an auxiliary shaft for receiving an externally provided driving force with a first torque transmission path for transferring the externally provided driving force to a drive mechanism and a second torque transmission path for transferring the motor provided driving force to said drive mechanism. A first one way drive means is provided in the first torque transmission path between the auxiliary shaft and the drive mechanism such that when the drive mechanism is being driven by the motor provided driving force through the second torque transmission path, the auxiliary shaft is able to freewheel. The motor unit can drive any apparatus, but may be used in a pedal driven apparatus such as a bicycle where an externally provided driving force is provided by manually operable pedals of said apparatus which are fixed for rotation with the auxiliary shaft. In this case, the auxiliary shaft comprises a pedal spindle of the bicycle and the drive mechanism comprises a sprocket or belt drive.

A flywheel/motor assembly is disclosed that comprises a motor housing having a sidewall and an end wall extending substantially perpendicularly from the sidewall. The end wall enclose a motor assembly having a rotatable shaft extending therefrom. The motor housing has at least one air flow opening therethrough. A flywheel is coupled to the shaft, and includes a pulley side and a motor side opposite the pulley side, wherein the motor side is aligned substantially with the end wall and does not extend over the sidewall. A plurality of vanes are associated with the flywheel, wherein adjacent vanes form channels therebetween. A ring is coupled to the plurality of vanes and at least partially encloses the channels and forms exhaust ports away from the shaft. Rotation of the flywheel draws air through the motor housing's openings into the channels and out the exhaust ports. The pulley side may include balancing bores for receiving balancing material to balance the finished assembly. An angular interference fit between the flywheel and motor shaft may also assist in balancing the finished assembly. A ventilation fan system may also be connected to the shaft at an end opposite the flywheel.

A device for stimulating the meibomian glands of the eyelid comprising: a handle; a head that is non-removable and integral to the handle, the head comprising an eyepiece that oscillates to provide a massaging action to an eyelid and that comprises a front end that is concave in shape to fit over an eyelid; a heater located inside of the eyepiece; a temperature sensor located inside of the eyepiece, wherein the temperature sensor causes the eyepiece to heat to a predetermined temperature and then stop heating; and a charging base that supplies power to a motor that causes the eyepiece to oscillate, wherein the motor comprises a motor shaft. A method of applying heat and massaging action to the eyelid at the same time.

A system for hydraulically fracturing an underground formation in an oil or gas well, including a pump for pumping hydraulic fracturing fluid into the wellbore, the pump having a pump shaft, and an electric motor with a motor shaft mechanically attached to the pump to drive the pump. The system further includes a torsional coupling connecting the motor shaft to the pump shaft. The torsional coupling includes a motor component fixedly attached to the motor shaft and having motor coupling claws extending outwardly away from the motor shaft, and a pump component fixedly attached to the pump shaft of the pump and having pump coupling claws extending outwardly away from the pump shaft. The motor coupling claws engage with the pump coupling claws so that when the motor shaft and motor component rotate, such rotation causes the pump component and the pump shaft to rotate, thereby driving the pump.

A hybrid linear actuator features a central load shaft on which a plurality of solid-state magnetostrictive thrusters are positioned in operative relation to electric motors of a permanent magnet synchronous type to impart linear thrust force to the load shaft through clutch units also positioned thereon and under control of force and stroke amplification of output force from motor shafts projecting from the motors.

The invention discloses an air frying pan and aims at providing an improved air frying pan. The air frying pan comprises a furnace head and a housing, and is characterized in that a motor and a heating tube cover are arranged in the furnace head; the tail end of a motor shaft is connected with hot air blades in a thread matching manner; the heating tube cover is provided with a heating tube; an object disc is arranged in the housing; the object disc and an inner container are connected; the top and bottom of the inner container are hollow; and a filter screen is arranged inside the inner container. The air frying pan is mainly used for cooking food.

This invention relates to two remote trolley swing and its balance control method, which is characterized by the following: fixing the two direct motors onto car with one end of motor axis connected to wheel and with other end connected to code disc axis; the two axis middle position is fixed with gyroscope with swing bar, controller, remote receiver, power conversion module and motor driver welded on circuit board; the circuit board and direct power are fixed on car. The balance control method comprises automatically parts voltage judging, float correcting and noise measuring for filtering.