389 results about "Solenoid actuator" patented technology

A valve assembly comprises two valves and a single solenoid actuator with only one magnetizing coil that controls both valves. The corresponding magnetic circuit comprises a yoke with only two pole pieces. The valves are arranged concentric to one another. The valve closing element of the outer valve is connected to an armature by means of a sleeve. The cup thus formed receives the armature that is connected to the valve closing element of the inner valve. The pole piece and the armature form a transmission air gap through which the sleeve extends. A coupling air gap is formed between the armatures. The armature and the pole piece form a working air gap. The valves are opened collectively and are able to close independently of one another when the coil is rendered currentless.

A brake mechanism (10) for an elevator (2) is activated in response to an electronic control signal to prevent movement of an elevator car (16) under predetermined conditions. The brake mechanism is preferably a safety mechanism (10) and does not require a governor sheave, a governor rope, or a tension sheave. The safety mechanism in one disclosed example utilizes a solenoid actuator (22b) and an electric motor (40) and gear box assembly (42) to move safety wedges (18) into engagement with a guide rail (20) to stop the elevator car (16). The safety wedges (18) are held in a non-deployed position during normal elevator operation. If there is a power loss or if elevator car speed exceeds a predetermined threshold, an electronic control signal activates the safety mechanism (10) causing the solenoid to release, which causes the safety wedges (18) move in a direction opposite to that of a safety housing (12) mounted for movement with the elevator car (16). Angled surfaces of the safety housing (12) force the safety wedges (18) into engagement with the guide rail (20). The safety mechanism (10) can be selectively reset from a remote location.

A valve assembly comprises two valves and a single solenoid actuator with only one magnetizing coil that controls both valves. The corresponding magnetic circuit comprises a yoke with only two pole pieces. The valves are arranged concentric to one another. The valve closing element of the outer valve is connected to an armature by means of a sleeve. The cup thus formed receives the armature that is connected to the valve closing element of the inner valve. The pole piece and the armature form a transmission air gap through which the sleeve extends. A coupling air gap is formed between the armatures. The armature and the pole piece form a working air gap. The valves are opened collectively and are able to close independently of one another when the coil is rendered currentless.

A dual fuel injector may be used to injector both gas and liquid fuel into a cylinder of a compression ignition engine. An injector body defines a first set of nozzle outlets, a second set of nozzle outlets, a first fuel inlet and a second fuel inlet. A dual solenoid actuator includes a first armature, a first coil, a second armature and a second coil that share a common centerline. The dual solenoid actuator has a non-injection configuration at which the first armature is at an un-energized position and the second armature is at an un-energized position. The dual solenoid actuator has a first fuel injection configuration at which the first fuel inlet is fluidly connected to the first set of nozzle outlets, the first armature is at an energized position and the second armature is at the un-energized position. The dual solenoid actuator has a second fuel injection configuration at which the second fuel inlet is fluidly connected to the second set of nozzle outlets, the first armature is at the un-energized position and the second armature is at an energized position. The dual solenoid actuator may also include a combined fuel injection configuration.

A magnetic device is formed from a permanent magnet generating magnetic flux, an armature which can occupy two positions between four poles and an electromagnet winding to which current can be supplied to produce a magnetic flux in one direction or the other, the flux from the winding causing the armature to move into one position and continue to remain in that position after the current flow ceases. The device can be incorporated into a fluid valve to act as a drive for opening and closing the valve. It may also serve as the drive for opening and closing electrical contacts. Monostable operation can be achieved by locating a magnetic flux shunt at one end of the armature travel. A holding solenoid may be incorporated. A pivoting armature in a fluid tight chamber comprises a fluid flow controlling device. It can adopt either of two home positions in contact with two magnetic poles and is retained by magnetic flux from a permanent magnet. Fluid can flow into and out of the chamber via a first passage. A second passage extends through one of the poles to an opening in the pole face which is covered by the armature when the latter occupies one home position but is uncovered when the armature occupies its other home position. A third fluid passage extends through and leads to a second opening in another pole, which is covered when the armature occupies its said other home position. Passages in the poles house energy storing springs each of which is compressed as the armature approaches the pole. A push rod can extend through a passage in one of the poles for conveying armature movement externally of the device.

A brake mechanism (10) for an elevator (2) is activated in response to an electronic control signal to prevent movement of an elevator car (16) under predetermined conditions. The brake mechanism is preferably a safety mechanism (10) and does not require a governor sheave, a governor rope, or a tension sheave. The safety mechanism in one disclosed example utilizes a solenoid actuator (22b) and an electric motor (40) and gear box assembly (42) to move safety wedges (18) into engagement with a guide rail (20) to stop the elevator car (16). The safety wedges (18) are held in a non-deployed position during normal elevator operation. If there is a power loss or if elevator car speed exceeds a predetermined threshold, an electronic control signal activates the safety mechanism (10) causing the solenoid to release, which causes the safety wedges (18) move in a direction opposite to that of a safety housing (12) mounted for movement with the elevator car (16). Angled surfaces of the safety housing (12) force the safety wedges (18) into engagement with the guide rail (20). The safety mechanism (10) can be selectively reset from a remote location.

An electromagnetic actuator comprises: a fixed core of a magnetic material provided with one pair of pole teeth, which are cylindrical and face each other; exciting coils wound on the fixed core; and a moving object which is movably disposed in the direction of the axis line coaxially with the pole teeth, wherein the moving object includes: cylindrical permanent magnet, in which the N pole and the S pole have been magnetized in the radial direction; and a cylindrical movable core of magnetic material which is coaxially connected to the permanent magnet and is displaced together with the permanent magnet.

An automatic transfer switch includes a solenoid control contacts assembly, an auxiliary contacts assembly, a dual purpose cam attached to a cylindrical shaped weight, and a solenoid actuator. When energized, the solenoid actuator rotates the cylindrical weight and the dual purpose cam actuates both the solenoid control contacts assembly and the auxiliary contacts assembly.

An electromagnetic micro actuator, e.g. for use in fiber optics, is operated by a ferromagnetic piston mounted within two electromagnetic coils inside a housing. The piston is held in place and magnetized by a plurality of permanent magnets. The coils are wired for opposite polarity and energizing the coils will tend to push the piston away from one coil and draw it towards another. A ceramic shaft attached to the piston protrudes from both ends of the micro actuator housing and moves with said piston. Energizing the coils thus moves the piston in one or the opposite direction depending on the current direction. Tapered jewel bearings guide the shaft with minimal friction.

A wholly implantable non-natural heart for humans is a double pump configuration provided with two auricles and two ventricles. Both the said auricles and ventricles are driven by solenoid actuators interacting with high energy magnets; the auricles and ventricles which are hollow chambers are provided with one-way valves in the usual manner, for the purpose of effectively and rhythmically moving blood to and from the said chambers; power generation for driving said solenoid actuators, as well as an electronic control unit is accomplished by a power generating module which could be a simple battery, a miniature spring-driven generator, a mems generator or a redundant self-sustaining generator or a combination of all of the above; the self-sustaining generator has been proposed and designed to power this present artificial heart and will be presented in a separate patent application in the near future as a follow up to this present one; the aforementioned electronic control unit is preferably configured to amplify the signals from the power generating unit as well as utilizing input / output signals from temperature and pressure sensors embedded in the heart to vary contractile force and frequency of beats, based on bodily requirements, thereby mimicking some functions of the natural heart; the electronic unit is also preferably provided with a translator chip that converts signals from the cardiac / vargus trunks (sympathetic and parasympathetic nerves) via electrodes into clear electric currents for varying actuator outputs; the heart would be implanted in the normal position in the chest, atop the diaphragm, while the electronic control unit and the power generation module would preferably be implanted behind the breastbone and lower abdomen respectively; all components of the present invention are amenable to current mass production techniques and miniaturization for the purpose of fitting into individuals of various sizes; as is clearly shown in FIG. 1, this present invention is an integral three-tiered configuration constituted of pumping unit I, the power generating unit II and the controller III. Also, as aforementioned, additional signals from the embedded temperature and pressure sensors, as well as nerve connecting electrodes are used to manipulate instantaneous outputs. The said electrodes are in the form of cuffs and are to be implanted on the vargus nerves (sympathetic and parasympathetic); Texas Instruments (TI) manufactures reliable operational and instrumentation amplifiers which can detect condition, and amplify nerve signals. The VCO in the controller uses the signals to manipulate instantaneous outputs of the actuating solenoids.

Solenoid operated fluid control valve for a cam phasing mechanism of an internal combustion engine includes first and second control ports, a 2-stage hydraulically pilot-actuated, pressure balanced spool having an integral control feedback passage and a linear force solenoid actuator operably coupled to a pilot valve of a pilot stage. The spool valve includes an exhaust path common to pilot and spool exhaust passages.

A fuel injector equipped with an injection valve comprising a mobile plunger ending with a sealing head; a support body having a tubular shape and comprising a feed channel; and a sealing body, in which is defined a valve seat of the injection valve; the sealing head is of a frustoconical shape, is arranged externally relative to the guide element, is thrust by a spring against said guide element in a direction contrary to the direction of feed of the fuel; the valve seat has a frustoconical shape which is a negative reproduction of the frustoconical shape of the sealing head in order to impart an internally hollow conical shape to the injected fuel.

A solenoid actuator (1) attached to a 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 both sides of the plunger (4). A plunger front chamber (74) is formed between the first bearing (7) and the plunger (4), a plunger rear chamber (75) is formed between the plunger (4) and the second bearing (8), and a second bearing rear chamber (76) is formed on the opposite side of the second bearing (8) to the plunger rear chamber (75). To secure an oil flow between these chambers, a plunger exterior oil passage (63), a second bearing oil passage (64), and a shaft-penetrating oil passage (65) are provided, thereby realizing a preferable balance between oil pressures acting on the second bearing (8).