66results about How to "Close safe" patented technology

A cartridge system mixes and applies a mixing ware, such as, for example, a medical cement. The cartridge system has two cartridges that are arranged parallel to each other, and a mixing space having an outlet opening, wherein the cartridges each comprise at least one opening in the cartridge walls that connects the cartridges to the mixing space. The cartridges each comprise a feed plunger for expelling starting components of the mixing ware out of the cartridges through the openings, wherein a closure that can be shifted in the mixing space is arranged in the mixing space in a manner such that it closes the openings of the cartridges in a starting position and in that the openings to the mixing space are opened, at least in part, in a final position of the shiftable closure, wherein the shiftable closure can be shifted from a starting position to a final position. A dispensing tube for the cartridge system has, opposite from a dispensing tube tip of the dispensing tube, an extension with a diameter is smaller than an internal diameter of the mixing space, and which is designed to shift the shiftable closure during the insertion of the dispensing tube into the cartridge system head of the cartridge system such that the openings of the cartridges are open, at least in part.

A system includes an electrical enclosure having an inner volume and a door structured to open to expose the inner volume and structured to close to enclose the inner volume. A racking mechanism is disposed in the inner volume and includes a member movable in a first direction to a first position and an opposite second direction to a different second position. A network protector is carried by the racking mechanism and is movable thereby between a connect position in the inner volume corresponding to the first position of the member of the racking mechanism, and a test position in the inner volume corresponding to the different second position of the member of the racking mechanism. A control mechanism is structured to move the member of the racking mechanism between the first position and the different second position of the member responsive to a number of remote commands.

The invention relates to a power system with an electric circuit connected between a power grid and a power source. The electric circuit includes a main power converter having main input terminals connected to the power source 16 by a DC link and output terminals. The main power converter is controlled by a controller. The electric circuit includes a main transformer having a primary winding 8a and a secondary winding, the primary winding being connected to the output terminals of the main power converter. Main switchgear is connected between the secondary winding of the main transformer and the power grid. An auxiliary transformer has a primary winding connected to the power grid in parallel with the main switchgear and a secondary winding connected to the controller. A pre-charge circuit is connected between the auxiliary transformer and the DC link.

The invention provides a rolling path beam opening and closing device and a long steel rail transport train set, and relates to manufacturing technologies of rail transport vehicles. The rolling path beam opening and closing device comprises a control system and an opening and closing mechanism. The control system is used for controlling the opening and closing device to open or close a rolling path beam. The long steel rail transport train set comprises a train body and the rolling path beam arranged on the train body, wherein the rolling path beam is provided with the opening and closing device, namely the mentioned rolling path beam opening and closing device. Due to the fact that the control system controls the opening and closing device to open or close the rolling path beam, automation of steel rail assembling and disassembling of the long steel rail transport train set can be achieved easily, opening and closing of the rolling path beam are safer and more reliable, the working intensity of operation personnel can be greatly relieved, and operation efficiency is improved.

The invention relates to a large flow mechanical feedback pilot control plug-in type proportional throttling valve system and in particular relates to forward and reverse flowing throttling valve system engineering machinery equipment. The system is characterized in that the side of a main valve sleeve is provided with a main valve oil inlet and a main valve oil outlet, a back-moving spring is arranged between a main valve core and a guide sleeve, one end of a pilot valve sleeve is provided with a screw cover, a device feedback spring is arranged between the guide valve core and the guide sleeve, a first control port is communicated with one end of a first check valve, the other end of the first check valve is communicated with a pilot valve oil inlet, a second control port is communicated with one end of a second check valve, the other end of the second check valve is communicated with a pilot valve work port, the pilot valve oil inlet is communicated with the pilot valve work port, a third control port is communicated with a guide valve control port, the guide valve return opening is communicated with the guide sleeve and a cover plate return opening. The throttling valve system provided by the invention has the advantages of simple structure, instantaneous open, high linearity and small hysteresis based on the adopted mechanical closed loop feedback, thus the throttling valve system can be widely applied to a hydraulic control system of engineering machinery, machine tool casting-forging, diecast metallurgy, shipping and mine industry.

The invention relates to a pressure feedback secondary pilot control plugged-in type proportion relief valve system, in particular to a pressure feedback secondary pilot control plugged-in type proportion relief valve system device capable of realizing pressure proportion regulation in the open or closed process by a hydraulic system valve. The side face of a main valve sleeve is provided with a main valve oil inlet and a main valve oil outlet; a main valve core is arranged in an axial hole of the main valve sleeve; a first return spring is arranged between a cover gasket and the main valve core; the side face of a control cover plate is provided with a pressure sensor; a cone valve core and an adjusting screw rod are arranged in an axial hole of a threaded sleeve; a pressure adjusting spring is arranged between the cone valve core and the adjusting screw rod; a locking nut is arranged at one end of the adjusting screw rod; and the middle part of the jointing of the control cover plate and the cover gasket is provided with a first damping hole, and a third damping hole is arranged between a control oil port of the control cover plate and the first damping hole. The pressure feedback secondary pilot control plugged-in type proportion relief valve system has the effects that the structure is simple, and the pressure feedback secondary pilot control plugged-in type proportion relief valve system is opened instantly, is controlled proportionally, adopts the pressure closed loop feedback, and is widely used in the hydraulic control systems of machine tools, casting and forging,compression casting, metallurgy, ships and mine industry.

The invention relates to a high-flow hydraulic feedback pilot control plug-type proportion throttle valve system, and in particular a high-flow hydraulic feedback pilot control plug-type proportion throttle valve system engineering mechanical device which flows forward and reverse. The side face of a main valve sleeve is provided with a main valve oil inlet and a main valve oil outlet; an axial hole of the main valve sleeve is provided with a main valve plug internally; the axial hole of the main valve plug is provided with a number one check valve internally; one end of the main valve plug is provided with a cross throttling groove, and the other end of the main valve plug is provided with a thin and long throttle valve; the axial hole of a pilot valve sleeve is internally provided with a pilot valve plug; a restoration spring is arranged between the pilot valve plug and a thread insert; one end of a number two check valve is communicated with a main valve plug control chamber; one end of the number two check valve is communicated with a number three pilot valve control port; and one end of the number two check valve is communicated with a number one control port. The proportion throttle valve system provided by the invention has the advantages of simple structure, temporary starting, proportion control, high linearity and small hysteresis loop, and is widely used for a hydraulic control system of the industries of machine tool forging and metallurgy of engineering machinery, ship and mine.

The invention discloses an accident quick gate falling speed regulation device for a wind hoist and a control method. The accident quick gate falling speed regulation device comprises a brake, a height gauge, a speed sensor and a controller. The balancing magnitude relation of damping torque and holding force of the brake is controlled by acquiring the comparison value of the gate falling speed and the predetermined speed, and the purpose that a gate falls down at the predetermined speed is achieved; by acquiring the gate falling speed and the position signal, control is conducted according toa sequence closing method, quick falling of the gate and timely water flowing speed reduction are achieved, a hydraulic turbine set is prevented from operating in a runaway manner, the gate slowly falls into a bottom sill, the impact is reduced, and the gate and the bottom sill are protected from being damaged due to impact. According to the accident quick gate falling speed regulation device forthe wind hoist and the control method, the full-closed-loop automatic redundancy design is adopted, it is guaranteed that the gate is quickly, stably and safely closed in time under the accident state.

Memory devices that include a pre-charge transistor for connecting/disconnecting the input line of the global data line driver to a supply voltage line are more power consuming than the memory devices that do not include it because of a small though significant flow of current through the pre-charge transistor even in stand-by state. This problem is solved with a method implemented in a novel memory device, by turning on the pre-charge transistor only when, at the same time, the enabling signal of the page buffer is asserted, a low voltage functioning mode is selected and the memory device is not in a stand-by state, or the memory device is in a stand-by state but the datum read from the memory is high. The pre-charge transistor is securely turned off in all other cases.

The invention discloses an active breathing control system which comprises a control box, a handle controller, an airbag, an airbag controller, a respiration sensor, a body temperature sensor, a heart rate sensor, a blood pressure monitor, an LED lamp and a control host machine. The airbag controller is connected to the airbag. The control box is connected to the airbag controller and is used for controlling the airbag controller to allow the airbag to be inflated or deflated. The handle controller is arranged between the control box and the air controller and is used for manually controlling the inflation and deflation of the airbag. The respiration sensor, the body temperature sensor, the heart rate sensor, and the blood pressure monitor are connected to the control box. The LED lamp is connected to the control box and is started when the airbag is inflated. The control box is connected to the control host machine which is used for emitting a beam closing command to a linear accelerator according to the signals monitored by the body temperature sensor, the heart rate sensor, and the blood pressure monitor. According to the system, the closing of a ray beam can be timely controlled, and the effect of precise radiotherapy is improved.

A safety device for opening and closing isolating baffles of a withdrawable circuit breaker is arranged in a base support of a drawer seat of the circuit breaker and comprises four isolating baffles, a guide plate and two springs. Two of the four isolating baffles are arranged on a horizontal slide pre-arranged on the upper portion of the base support, and the other two baffles are arranged on a horizontal slide pre-arranged on a lower portion of the base support. The guide plate is inserted on a slot hole pre-arranged on the base support. The upper surface and the lower surface of the guide plate are respectively provided with two guide rails, and the inner end of the guide plate is provided with two guide rods. The two guide rails arranged on the upper surface of the guide plate are respectively in embedded connection with the two isolating baffles arranged on the upper portion of the base support, and the two guide rails arranged on the lower surface of the guide plate are respectively in embedded connection with the two isolating baffles arranged on the lower portion of the base support. The two springs are respectively sleeved on the two guide rods arranged on the guide plate. The safety device has the advantages of being compact in structure, reliable in opening and closing of the isolating baffles of the drawer seat of the circuit breaker, synchronous and stable, convenient in assembly and utilization and the like.

A door closer, in particular a hinge door closer, having a free-swing function, including a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a free-swing assembly which is adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked, and which is embodied as a sliding-coupling which exclusively transmits compressive forces between the closer spring and the piston assembly, and a hydraulic lock compartment adapted to lock the closer spring.

A cartridge system for mixing and applying a mixing ware. The cartridges are arranged parallel and they are connected to a mixing space and an outlet opening. The cartridges each comprise a feed plunger for expelling starting components of the mixing ware from the cartridges through the openings, and each cartridge has at least one closure allocated to it that is shiftable in longitudinal direction of the cartridges, whereby the closures close the openings of the cartridges in a starting position, and the openings are open, at least in part, in an end position of the shiftable closures. In open position, the closure is shifted into a hollow space. The closures are cylindrical in shape and in their end position are capable of being lowered into cylindrical hollow spaces of the cartridges in order to uncover the openings.

The invention provides a four-chamber cylinder for a hydraulic actuating device with emergency function and a hydraulic actuating device employing same. The four-chamber cylinder according to the disclosure has two piston devices which in each case have a piston and a piston rod. Each piston limits two counteractive chambers. When one chamber is adjusted and operated to press the piston device to another piston, and accordingly the other chamber extends one of abutting piston rods into the guiding gap of another piston rods in a telescopic way. The emergency spring retains under prestress during adjusting of the four-chamber cylinder, and two pistons extrude towards each other. In this way, a compact four-chamber cylinder is realized. The four-chamber cylinder serves for adjusting a valve, a turbine or a process device with increased safety demands. An actuating movement is possible via the emergency spring even in the case of a supply failure, wherein the four-chamber cylinder can be installed and operated bi-directionally.