An elevator car positioning system includes a plurality of magnetic field producers, each of the plurality of magnetic field producers located in a position corresponding to an entry/exit point of an elevator. A giant magnetoresistance (GMR) sensor is disposed on an elevator car of the elevator to detect individual ones of the plurality of magnetic field producers when within a given detection range of the GMR sensor and generate detection signals indicative thereof. A controller is in communication with the GMR sensor and is configured to receive the detection signals from the GMR sensor, determine a position of the elevator car relative to the entry/exit point based on the received detection signals, and generate control signals to position the elevator car.
A stabilizing system may be utilized to reduce or eliminate sway of magnetic tape that is suspended in an elevator hoistway and provides a positional reference to an elevator cab. The stabilizing system may include a stabilizing mechanism fixed within a hoistway and a roller cam disposed on the elevator cab. The stabilizing system may include a telescoping member attached to a guide having opposing flanges that restrict movement of the tape. The telescoping member and the guide may be biased in an extended position, where the guide partially surrounds the tape. In a retracted position, the guide is horizontally spaced apart from the tape. When the elevator cab passes the stabilizing mechanism, the roller cam may force the guide and the telescoping member into the retracted position to prevent any contact between the stabilizing mechanism and components disposed on the elevator cab.
A hydraulic elevator may comprise a bidirectional pump that controls up and down motion of an elevator car. A VVVF drive may cause the bidirectional pump to provide working fluid in a controlled manner to a hydraulic jack that supports the elevator car. A control valve may be disposed between the bidirectional pump and the hydraulic jack so that the control valve can be closed when the elevator car needs to be held in place. To avoid pressure waves that propagate when the control valve is opened with disparate pressures on the pump and jack sides of the control valve, the bidirectional pump may adjust the pressure on the pump side of the closed control valve to the pressure on the jack side of the control valve before the control valve is opened.
F15B 11/10 - Servomotor systems without provision for follow-up action with only one servomotor in which the servomotor position is a function of the pressure
B66B 1/04 - Control systems without regulation, i.e. without retroactive action hydraulic
B66B 1/30 - Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear
B66B 5/00 - Applications of checking, fault-correcting or safety devices in elevators
B66B 9/04 - Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
37 - Construction and mining; installation and repair services
Goods & Services
Installation, maintenance and repair of machines and installations for surmounting differing levels inside and outside buildings, namely, elevators, mechanical moving stair cases and moving walkways, platform lifts, passenger platform lifts, stair lifts, escalators, passenger boarding bridges, and all components connected to the aforesaid apparatus
37 - Construction and mining; installation and repair services
Goods & Services
Installation, maintenance and repair of machines and installations for surmounting differing levels inside and outside buildings, namely, elevators, mechanical moving stair cases and moving walkways, platform lifts, passenger platform lifts, stair lifts, escalators, passenger boarding bridges, and all components connected to the aforesaid apparatus
11.
Automatic rope tension equalizer system and method
An automatic rope tension equalizer system includes first, second, and third plungers, first, second, and third cam assemblies, and a hitch plate with first, second, and third cavities. The first, second, and third plungers are at least partially situated in the first, second, and third cavities, respectively. Each cam assembly has a cam and a rod extending therefrom. The cam of the first cam assembly engages the first plunger, the cam of the second cam assembly engages the second plunger, and the cam of the third cam assembly engages the third plunger. A network connects each cavity to each other cavity, and fluid in the network automatically equalizes pressure on the first, second, and third plungers, thereby affecting positioning of the first, second, and third plungers and, through each cam, tension on each rod.
B66B 7/10 - Arrangements of ropes or cables for equalising rope or cable tension
B66B 5/12 - Applications of checking, fault-correcting or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
B66B 1/04 - Control systems without regulation, i.e. without retroactive action hydraulic
A hydraulic elevator system includes a power unit and elevator controller where the elevator car is controlled within the hoistway when a portion of the hoistway might be flooded. The power unit includes a water tight tank having a ventilation tube or snorkel. A moisture sensor is connected with the elevator controller, and positioned within the pit of the hoistway. The moisture sensor detects the existence of a flooded pit condition and communicates such a condition to the elevator controller. The elevator controller initiates a safety sequence when the presence of a flooded pit condition is detected to prevent the elevator car from entering a flooded area of the hoistway.
A hydraulic elevator system includes a power unit and elevator controller where the elevator car is controlled within the hoistway when a portion of the hoistway might be flooded. The power unit includes a water tight tank having a ventilation tube or snorkel. A moisture sensor is connected with the elevator controller, and positioned within the pit of the hoistway. The moisture sensor detects the existence of a flooded pit condition and communicates such a condition to the elevator controller. The elevator controller initiates a safety sequence when the presence of a flooded pit condition is detected to prevent the elevator car from entering a flooded area of the hoistway.
A pumping unit for use with a hydraulic elevator system includes a reservoir storing fluid, a first pump, and a second pump. The first pump is coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is also coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is selectively actuatable when the first pump is inactivated.
A pumping unit for use with a hydraulic elevator system includes a reservoir storing fluid, a first pump, and a second pump. The first pump is coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is also coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is selectively actuatable when the first pump is inactivated.
An elevator moves through a hoistway with one or more sensors positioned so that they pass by one or more targets that are in fixed positions relative to the hoistway. As they pass, an inductive current is generated, giving the elevator's control circuitry precise information as to the vertical position of the elevator car. The control system adjusts the raising and/or lowering of the elevator car based on that position information and any discrepancy between it and the supposed position at which the control system had believed the car was. Discrepancies are accumulated over time as an indication of cable stretch, and when the stretch exceeds a particular threshold, an alarm is raised for maintenance. The control system also defines a "door zone" around each landing where, based on the precise height measurement achieved herein, it is safe under the circumstances to open the doors of the car.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Providing technical advice regarding repair and maintenance in the field of elevators as well as parts and components in connection with elevators; maintenance and repair of technical equipment, namely equipment for monitoring and control of security, safety, temperature and telecommunications associated with elevators and escalators installed in buildings, maintenance and repair of circuit boards utilized in elevator systems Installation, maintenance, programming and troubleshooting of computer software utilized in the field of elevators; technical project feasibility studies and engineering design services in the field of elevators as well as parts and components in connection with elevators
37 - Construction and mining; installation and repair services
Goods & Services
(1) Elevators and elevator parts; (1) Retail sales of elevators and elevator parts;
(2) Installation and maintenance services for elevators and elevator parts;
37 - Construction and mining; installation and repair services
Goods & Services
(1) Elevators and elevator parts. (1) Retail sales of elevators and elevator parts;
(2) Installation and maintenance services for elevators and elevator parts;
