| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 187288000 | Control actuates mechanical braking means for power source | 41 |
| 20080223666 | Traction Arrangements - A traction arrangement comprises a track, a carriage, guide means guiding the carriage along the track with a predetermined carriage/track gap, and eddy current means generating eddy current across the gap giving rise to a traction force. Such an arrangement has utility in ropeless elevator systems. | 09-18-2008 |
| 20080236954 | METHOD OF PREVENTING COLLISION OF TWO ELEVATOR CARS MOVABLE IN THE SAME SHAFT OF AN ELEVATOR INSTALLATION, AND CORRESPONDING ELEVATOR INSTALLATION - A method of preventing a collision of two elevator cars of an elevator installation, which cars move substantially independently of one another in a common shaft, and an elevator installation includes a collision protection system that produces a retardation of each moved elevator car by a stopping brake as soon as the effective distance between the elevator cars falls below a critical minimum distance. After retardation of the cars by the stopping brakes, an emergency stop system comes into function. A control system of this emergency stop system ascertains the instantaneous movement state of the elevator cars. With the help of the car brakes, which are associated with the elevator cars, an additional retardation of each moved elevator car is triggered when the movement state thereof fulfils definable emergency stop criteria. | 10-02-2008 |
| 20080264729 | Elevator and elevator brake - The invention relates to an elevator and an elevator brake, which elevator contains at least a hoisting machine ( | 10-30-2008 |
| 20080308360 | METHOD AND ELEVATOR DRIVE WITH A BRAKE DEVICE - An elevator drive with a brake device has compression springs that act on brake levers, whereby brake linings generate a brake force on a brake drum. The more the brake linings wear due to abrasion, the smaller the distance of the plunger from the brake magnet housing becomes. Should the plunger come into contact with the brake magnet housing, the braking capacity of the brake linings is completely eliminated creating an operating condition that is dangerous for elevator users. A switch is provided that detects a minimum distance. The switch can be arranged on the plunger of the brake magnet and detect the minimum distance to the brake magnet housing or, in the case of a retrofit, the switch can be arranged on the brake magnet rod and, for example, detect the distance of the second joint from the brake magnet housing, and at the minimum distance the switch switches. | 12-18-2008 |
| 20090000877 | Managing an Encoder Malfunction in an Elevator Drive System - An encoder failure in an elevator drive system is detected and managed. A velocity of the elevator drive system is provided by an encoder signal ( | 01-01-2009 |
| 20090071761 | Hydraulic Elevator Stabilization Device - The invented device works by attaching a rotor brake to the traction sheave while anchored to a solid object. When the traction sheave is rotating at normal speeds, the hydraulic pump maintains a consistent oil pressure in the storage tank. In the event of a sudden acceleration in either direction, the control box valve overflows the excess pressure and apples it to the rotor brakes, slowing the movement of the car and stabilizing the traction sheave in addition of the cargo and occupants. | 03-19-2009 |
| 20090133965 | METHOD AND SYSTEM FOR DETECTING AND STOPPING UNCONTROLLED MOVEMENT OF AN ELEVATOR CAR IN AN ELEVATOR - Method and system for detecting and stopping uncontrolled movement of the car ( | 05-28-2009 |
| 20090145698 | ELEVATOR DEVICE - In an elevator apparatus, a brake device for braking the running of a car is controlled by a brake control device. The brake control device monitors a speed of the car and a degree of deceleration of the car at a time of emergency braking of the car. When the degree of deceleration of the car reaches a preset target deceleration, the brake control device generates a target speed pattern for decelerating the car from a speed of the car at that time. | 06-11-2009 |
| 20090229924 | ELEVATOR APPARATUS - In an elevator apparatus, a brake device is controlled by a brake control device. The brake control device is capable of performing braking force reduction control for reducing the braking force of the brake device at a time of emergency braking of a car. The brake control device monitors a running state of the car at the time of emergency braking thereof, and makes a switchover between validity and invalidity of braking force reduction control such that the car is stopped within a preset allowable stopping distance. | 09-17-2009 |
| 20090255764 | ELEVATOR DEVICE - In an elevator apparatus, a brake control device has a first brake control portion for operating a brake device upon detection of an abnormality to stop a car as an emergency measure, and a second brake control portion for reducing a braking force of the brake device when a degree of deceleration of the car becomes equal to or higher than a predetermined value at a time of emergency braking operation of the first brake control portion. The second brake control portion detects emergency braking operation of the brake device independently of the first brake control portion. | 10-15-2009 |
| 20090266649 | EMERGENCY STOP SYSTEM FOR ELEVATOR - An emergency stop system for an elevator includes a state sensor for detecting an operation of a car, a brake device for braking the car, a brake controller for outputting a signal for operating the brake device based on a signal detected by the state sensor, and an uninterruptible power supply device for supplying electric power to the sensor, the brake device, and the controller. The controller has a signal processing/calculating unit for calculating the deceleration of the car based on the signal detected by the sensor, a command value calculating unit for calculating a command value for operating the brake device based on the deceleration of the car calculated by the processing/calculating unit, and a power monitoring device for monitoring state of the uninterruptible power supply device. At least one of the sensor, the processing/calculating unit, and the calculating unit includes independent systems. | 10-29-2009 |
| 20100000824 | ELEVATOR MACHINE BRAKE WITH INTEGRATED BEARING AND BRAKE SURFACE - An elevator machine ( | 01-07-2010 |
| 20100025162 | Elevator Apparatus - In an elevator apparatus, a brake device stops a car from running. The brake device has a brake control portion for controlling a braking force generated at a time of emergency braking to adjust a deceleration of the car, and a timer circuit for invalidating the control of the braking force performed by the brake control portion after a lapse of a predetermined time from a moment when an emergency braking command is generated. | 02-04-2010 |
| 20100032245 | Elevator Apparatus - In an elevator apparatus, a brake device is controlled by a brake control device. The brake control device has a first brake control portion for operating the brake device to stop a car as an emergency measure upon detection of an abnormality, and a second brake control portion for reducing a braking force of the brake device when a deceleration of the car becomes equal to or larger than a predetermined value during emergency braking operation of the first brake control portion. The second brake control portion controls the brake device independently of the first brake control portion. | 02-11-2010 |
| 20100038184 | Lift System Having A Lift Car With A Brake Device Which Is Arranged In The Region Of The Lift Car For Holding And Braking The Lift Car, And A Method For Holding And Braking A Lift Car Of This Type - A lift car with a brake device which is arranged in the region of the lift car for holding and braking the latter; the brake device includes a brake unit which can interact with a brake rail, an actuating device which can generate an actuator force, and a connector which connects the actuating device to the brake unit in a force-active manner in order to transmit the actuator force, wherein the brake unit is in its open position in the unloaded position. | 02-18-2010 |
| 20100038185 | FAIL-SAFE POWER CONTROL APPARATUS - The invention relates to a fail-safe power control apparatus ( | 02-18-2010 |
| 20100044159 | ELEVATOR APPARATUS - In an elevator apparatus, a brake device stops a car from running. The brake device has a power shutoff portion for shutting off a supply of power to a brake opening coil in response to a brake actuation command, and a current adjusting portion for supplying the brake opening coil with power while adjusting an amount of current in response to a deceleration reduction command from a brake control portion. The current adjusting portion can supply the brake opening coil with power even when the supply of power to the brake opening coil is shut off by the power shutoff portion. | 02-25-2010 |
| 20100065379 | DEVICE AND METHOD FOR CONTROLLING A BRAKE DEVICE - An elevator drive has a brake device with compression springs to actuate brake levers, and brake linings on a brake drum creating a braking force. A sensor is provided to detect the movement of a brake magnet armature tappet. A bracket is attached to the brake magnet tappet on one end and a distance piece carrying the sensor housing is arranged on the other end. A restoring lug is attached to the existing mechanical indicator. A monitor evaluates the sensor signal and turns off the elevator drive in the event of dangerous operational states via a safety circuit. The system allows the state of the brake device to be monitored. The more the brake linings wear off due to abrasion, the smaller the distance between the armature and the brake magnet housing. If the armature is in contact with the brake magnet housing, the braking ability of the brake linings is completely void. | 03-18-2010 |
| 20100155183 | ELEVATOR - An elevator apparatus performing proper braking control of a car according to a detected content of a failure, and including: a semiconductor switch connected in series to a brake coil, for varying current flowing through the brake coil; an interruption switch connected in series to the brake coil and the semiconductor switch and capable of interrupting current flowing through the brake coil; a braking force control processing mechanism controlling an amount of current flowing through the semiconductor switch according to deceleration of the car when the car stops; a failure detection section detecting failure in the braking force control processing mechanism; a critical event detection mechanism detecting a critical event requiring an urgent stop of the car based on a state detection signal; and a brake power supply interrupting mechanism turning the interruption switch OFF to apply braking when the failure and the critical event is detected. | 06-24-2010 |
| 20100170751 | ELEVATOR APPARATUS - In an elevator apparatus, a rescue operation for a car is performed by a rescue operation controller. The rescue operation controller obtains a rescue operation voltage value and applies a voltage having the rescue operation voltage value to a brake coil in response to a signal from a speed detector at a time of the rescue operation for the car. The rescue operation voltage value is a value of the voltage necessary to reduce braking force of a brake device to move the car by using a state of imbalance between the car and a counterweight. | 07-08-2010 |
| 20100258382 | ELEVATOR SYSTEM - An elevator system includes a car ( | 10-14-2010 |
| 20110088982 | Lifting Device For An Overhead Projector Which Has A Constant Velocity During The Upward And Downward Movement - A lifting device includes a lifting unit, a drive unit connected with the lifting unit to control operation of the lifting unit, and a braking unit connected with the drive unit to control operation of the drive unit. The braking unit includes a microprocessor, a control circuit connected with the microprocessor, a changeover switch connected with the control circuit and the drive unit, and a control switch connected with the microprocessor and the changeover switch. Thus, the drive unit is rotated normally in the positive direction to lift the overhead projector and is rotated at a slower speed in the reverse direction to lower the overhead projector so that the overhead projector is kept at a constant speed during the lifting and lowering process and is moved upward and downward smoothly and stably. | 04-21-2011 |
| 20110132696 | METHOD FOR MONITORING A BRAKE SYSTEM IN AN ELEVATOR SYSTEM AND CORRESPONDING BRAKE MONITOR FOR AN ELEVATOR SYSTEM - A brake monitor for monitoring a brake system of an elevator system that includes a drive and a drive controller in addition to the brake system. The brake monitor includes a first brake signal input for electrically connecting the brake monitor to a first brake contact of the brake system and a driving signal input for connecting the brake monitor to a first electrical driving signal line of the drive controller. Also provided are a power supply, a microprocessor and a relay circuit. The relay circuit is configured to be activated for interrupting a safety circuit of the elevator system or for interrupting a control voltage of the drive controller so that the elevator system can be stopped. | 06-09-2011 |
| 20110186385 | SPEED GOVERNOR FOR AN ELEVATOR - In a speed governor for an elevator, a clutch mechanism is provided between a governor sheave and a rotary body. An actuator performs switching between transmission and interruption of rotation by the clutch mechanism according to whether or not energization from a DC generator, which generates a current by rotation of the governor sheave, is performed. A rectifier circuit allows the current to flow from the DC generator to the actuator only when a rotating direction of the governor sheave is a predetermined one of a first direction and a second direction. | 08-04-2011 |
| 20110240410 | ELEVATOR BRAKE ACTUATOR HAVING A SHAPE-CHANGING MATERIAL FOR BRAKE CONTROL - An elevator machine ( | 10-06-2011 |
| 20110240411 | CONTROL CIRCUIT AND CONTROL METHOD OF ELEVATOR BRAKING SYSTEMS - A control circuit and a control method of elevator braking systems are provided. The control circuit comprises a contracting brake signal generating circuit, wherein a door lock relay DJ and a contracting brake contactor ZJ are series connected; a contracting brake signal processing circuit, for converting between high and low level to trigger a braking controller; and an isolation control switch CK jointly connected in the contracting brake signal generating circuit and the contracting brake signal processing circuit. The control circuit and control method of the present invention are used for elevator braking systems to eliminate the adhesion of contacts of contracting brake circuit of elevator braking systems that frequently occurs, thereby preventing the major safety accidents such as the elevator slipping, overrunning or collapsing to the bottom, and, consequently, improving the safety and stability of elevators during operation. | 10-06-2011 |
| 20110278099 | ELEVATOR SYSTEM - An elevator system and a brake control circuit include a first switch that controls the electricity supply of the winding of the brake, which switch is connected in a controlled manner with the control of the electricity supply of the winding of the brake, and thus the braking function is controlled. | 11-17-2011 |
| 20110308894 | ARRANGEMENT AND METHOD FOR CONTROLLING THE BRAKE OF AN ELEVATOR - A method and an arrangement for controlling a brake of an elevator. In the method a plurality of optional objectives of operation are determined for the elevator; one or more of these objectives is selected at a time to be implemented as an objective of the operation of the elevator by using selection criterion; references for the energizing current of the brake of the elevator that differ from each other and/or references for the closing current of the brake of the elevator that differ from each other are determined; the brake current reference used at any given time is selected so that the selected brake current reference best corresponds to an objective of the operation of the elevator to be implemented; and also the brake of the elevator is controlled by adjusting the brake current towards the selected brake current reference. | 12-22-2011 |
| 20120118675 | ELEVATOR SAFETY CIRCUIT - An elevator safety circuit can be used to decelerate an elevator car during an emergency stop in a controlled manner. The safety circuit includes a series chain of safety contacts having an input connected to a power source and a first safety relay deriving electrical power from an output of the series chain of safety contacts. A delay circuit is arranged between the output of the series chain of safety contacts and the first safety relay. Hence, if any of the safety contacts open to initiate an emergency stop, a process controlled by the operation of the first safety relay is delayed. | 05-17-2012 |
| 20120152658 | DETECTING DEPARTURE OF AN ELEVATOR CAGE - An electromechanical monitoring device for detecting undesired departure of an elevator cage from standstill is disclosed. The electromechanical monitoring device includes a co-running wheel which when required is pressed against a guide track of the elevator cage, possibly against a running diameter of the speed limiter. A sensor detects rotation of the co-running wheel and actuates a braking device if a rotational angle of the co-running wheel exceeds a predetermined value. This electromechanical monitoring device can be suitable for attachment to or installation in a speed limiter and can be suitable for retrofitting to elevator installations. | 06-21-2012 |
| 20130043097 | TRIGGERING OF AN ELEVATOR BRAKE IN AN EMERGENCY SITUATION - A method for triggering an elevator brake in an emergency situation of a vertically movable elevator car in an elevator installation, wherein a movable part of the brake is held in a starting position by an electromagnetic force generated by a coil connected with a voltage source, and for triggering the brake the voltage supplied to the coil is interrupted and the movable part is moved from the starting position to a braking position by a spring force of at least one spring. A voltage is set by a switching unit that is connected with a control unit in dependence on at least one travel parameter of the elevator car determined by the control unit and, in the case of failure of the voltage source, triggering of the elevator brake is delayed by a delay unit in dependence on the set voltage. | 02-21-2013 |
| 20130105248 | SELECTIVE ELEVATOR BRAKING DURING EMERGENCY STOP | 05-02-2013 |
| 20130213745 | METHOD IN CONNECTION WITH A QUICK STOP SITUATION OF AN ELEVATOR, AND ALSO A SAFETY ARRANGEMENT FOR AN ELEVATOR - A method and a safety device for implementing the method are provided in connection with a quick stop situation of an elevator. In the method, an activation process of a machinery brake is started and also a disconnection process of the current supply of the elevator motor is started after the starting of the activation process of a machinery brake. | 08-22-2013 |
| 20130313052 | Stop Sequencing for Braking Device - An elevator system including a braking system, and a method of retrofitting an elevator for such braking system is disclosed. The braking system may comprise a first brake having a first magnetic brake coil, the first brake movable between a disengaged and an engaged position, a second brake having a second magnetic brake coil, the second brake movable between a disengaged and an engaged position, and a brake control device having a brake power source. The brake control device may be electrically connected to the first and second brakes and may be configured to selectively delay or sequence the movement of the first brake and the second brake to the engaged position with residual current from the brake coils. | 11-28-2013 |
| 20140020985 | Elevator Drive - A method for monitoring a brake which is operated by a spring force and a device for monitoring the force, comprising the steps of taking into account a force which is required to load or bias at least one spring by means of the device for monitoring the force. | 01-23-2014 |
| 20140231181 | ELEVATOR BRAKE CONTROL - An exemplary elevator brake control device includes a relay switch that is associated with a safety chain configured to monitor at least one condition of a selected elevator system component. The relay switch is selectively closed to allow power supply to an electrically activated elevator brake component responsive to the monitored condition having a first status. The relay switch is selectively opened to prevent power supply to the brake component responsive to the monitored condition having a second, different status. A solid state switch is in series with the relay switch between the relay switch and the brake component. A driver selectively controls the solid state switch to selectively allow power to be supplied to the brake component only if the relay switch is closed and the monitored condition has the first status. | 08-21-2014 |
| 20140332322 | ELEVATOR SYSTEM INCLUDING MONITORING ARRANGEMENT TO ACTIVATE EMERGENCY BRAKING PROCEDURE BASED ON DECELERATION AND METHOD OF OPERATING THE SAME - The invention relates to an elevator system and also to a method for monitoring the movement an elevator car. In the method a first emergency braking procedure is activated for braking the elevator car at a first deceleration if the speed of the elevator car exceeds the first limit value for permitted speed, and also a second emergency braking procedure is further activated for braking the elevator car at a second deceleration that is greater than the first, if the speed of the elevator car exceeds the second limit value for permitted speed that is greater than the first limit value for permitted speed. | 11-13-2014 |
| 20150053507 | BRAKE CONTROLLER, ELEVATOR SYSTEM AND A METHOD FOR PERFORMING AN EMERGENCY STOP WITH AN ELEVATOR HOISTING MACHINE DRIVEN WITH A FREQUENCY CONVERTER - A brake controller, an elevator system and a method for performing an emergency stop are provided. The brake controller includes an input for connecting the brake controller to the DC intermediate circuit of the frequency converter driving the hoisting machine of the elevator, an output for connecting the brake controller to the electromagnet of the brake, a switch for supplying electric power from the DC intermediate circuit of the frequency converter driving the hoisting machine of the elevator via the output to the electromagnet of a brake, and also a processor with which the operation of the brake controller is controlled by producing control pulses in the control pole of the switch of the brake controller. | 02-26-2015 |
| 20150075917 | DRIVE DEVICE OF AN ELEVATOR - A drive device of an elevator includes a DC bus, a motor bridge connected to the DC bus for the electricity supply of the elevator motor, which motor bridge includes high-side and low-side switches for supplying electric power from the DC bus to the elevator motor when driving with the elevator motor, and also from the elevator motor to the DC bus when braking with the elevator motor, a control circuit of the motor bridge, with which control circuit the operation of the motor bridge is controlled by producing control pulses in the control poles of the high-side and low-side switches of the motor bridge, a brake controller, which comprises a switch for supplying electric power to the control coil of an electromagnetic brake, a brake control circuit, with which the operation of the brake controller is controlled by producing control pulses in the control pole of the switch of the brake controller, an input circuit for the safety signal to be disconnected/connected from outside the drive device, drive prevention logic, which is connected to the input circuit and is configured to prevent the passage of control pulses to the control poles of the high-side and/or low-side switches of the motor bridge when the safety signal is disconnected, and also brake drop-out logic, which is connected to the input circuit and is configured to prevent passage of the control pulses to the control pole of the switch of the brake controller when the safety signal is disconnected. | 03-19-2015 |
| 20150136530 | ABS BRAKE CONTROL CIRCUIT OF ELEVATOR BRAKE SYSTEM - An ABS brake control circuit of an elevator brake system comprises a brake controller, a backup power supply, a manual rescue instruction circuit, a power grid power-off instruction circuit, a system failure instruction circuit, a signal identification circuit and a brake mode switching circuit. when transport equipments, such as an elevator, an escalator, and so on, encounters a system failure or power grid power-off or needs an emergency rescue, the ABS brake control circuit can allow the transport equipment to transition to a safe brake stop through a previous safe deceleration, thereby eliminating a significant security risk caused by a halt resulted from one-step brake which exists in an elevator brake system, and being capable of ensuring that the manual brake releasing will not cause the phenomena of a stalling of an elevator car and a brake failure of a brake, such that the brake safety of the transport equipments such as an elevator, an escalator, a moving walkway and the like is increased. | 05-21-2015 |
| 20160009526 | ELEVATOR HAVING A SAFETY CHAIN WITH A SERIES CONNECTION OF SAFETY SWITCH ARRANGEMENTS | 01-14-2016 |
