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| Number | Title | Issue Date |
| 7350627 | Elevator arrangement The invention relates to a safety device arrangement for an elevator door opening, said safety device arrangement comprising at least a toe guard (3) placed substantially at the lower edge of the elevator car and a safety circuit (21) connected to the ... | 04/01/2008 |
| 7322445 | Stop bar for creating a temporary safety space within an elevator hoistway A device and procedure for creating and securing a temporary safety space within an elevator hoistway such that a service or maintenance technician can work with impunity from a car entering the safety space. In particular, the device includes a stop bar for install... | 01/29/2008 |
| 7287625 | Forklift safety sensor and control system A forklift safety sensor and control system for preventing unsafe wear on the bottom surface of the fork. A fork height sensor detects when the fork is below a predefined threshold height at which the bottom surface is in close proximity to the ground or is in conta... | 10/30/2007 |
| 7219770 | Coordinated lift system with user selectable RF channels A coordinated lift system with user selectable RF channels coordinates the raising and lowering of a vehicle relative to a surface by using wireless communications. The lift system includes at least two lift mechanisms each having support frame, including a post, a ... | 05/22/2007 |
| 7152714 | Elevator car separation based on response time The time required for each car to reach each up hall call and each down hall call is calculated (30, 33). These times are then arranged in categories and the number of landings in each category is identified. From fuzzy sets (FIGS. 7–10), the count o... | 12/26/2006 |
| 7096998 | Stairway lift A combination elevator and stairway may be installed beneath a set of stairs and includes a lift mechanism which raises and lowers a platform or enclosed car and a pivoting stairway. The lift may be hydraulically or electrically actuated and may include a telescopin... | 08/29/2006 |
| 7097001 | Elevator car door movement restrictor An elevator door restrictor system for preventing an elevator door from being opened unless the elevator car is near a floor landing, utilizing battery backed electronics for sensing the presence of a building landing such that the system will continue to maintain t... | 08/29/2006 |
| 7090055 | Boat lift brake apparatus A boat lift braking system includes a threaded shaft driven by the boat lift motor. A torsion tube disposed about the shaft carries an interiorly threaded nut that interengages the peripheral threads of the shaft. A rotor is mounted to the nut adjacent a brake pad t... | 08/15/2006 |
| 6889799 | Method for solving a multi-goal problem The invention concerns a method for solving an optimization task consisting of a plurality of sub-functions in the control of the operation of an apparatus. In the method, a set of a plurality of solution alternatives is generated and, according to the method, each ... | 05/10/2005 |
| 6857506 | Elevator control method based on energy consumption An elevator group control method for allocating landing calls and car calls to elevators so that the objectives set are met. In the method, a car-specific energy consumption file is generated to describe the energy consumption occurring during each trip of the eleva... | 02/22/2005 |
| 6182798 | Mobile lifting device for the disabled A mobile lifting device includes a car having a gate and a docking plate mechanically interconnected at one end of the car. A low voltage DC control system includes an "up" circuit, a "down" circuit connected in parallel with the up circuit, and a sensor ... | 02/06/2001 |
| 5959272 | Fail safe roller switch A switch (8) having an arm (12) and a roller (16) includes a biasing force generating means (140, 150, 160) for operating the switch in the event the roller (16) is detached.... | 09/28/1999 |
| 5893433 | Elevator car position detecting apparatus An elevator car position detecting apparatus includes plates arranged at selected operation points defined along the elevator path, in such arrangement that one operation point is distinguishable from another operation point. Position detectors are provid... | 04/13/1999 |
| 5880417 | Synchronous position correction apparatus for elevator An improved synchronous position correction apparatus for an elevator which is capable of safely escaping passengers from a car when a synchronous position error occurs in the elevator by moving the car to a neighboring floor and correcting the synchronou... | 03/09/1999 |
| 5864103 | Limit switch apparatus for hydraulic elevators An apparatus for generating function signals to an elevator controller for controlling an elevator car (1) at terminal landings in a building includes an upper cam (3) and a lower cam (4) for mounting on a wall (2a, 2b) in an elevator shaft (2) at a top l... | 01/26/1999 |
| 5862886 | Pretorque to unload elevator car/floor locks before retraction To prevent elevator rope stretch effects when a horizontally transferable elevator cab (18) is rolled onto and off of an elevator car frame (10), an elevator car/floor lock (31) includes a bolt (47) which extends across the interface between the car frame... | 01/26/1999 |
| 5783784 | Differential reflectometery for position reference in an elevator system An apparatus for determining if an elevator car is level with respect to a landing in a hoistway comprises a transceiver for transmitting a signal, a first reflector having a varying reflectance between a maximum reflectance end and a minimum reflectance ... | 07/21/1998 |
| 5773771 | Apparatus for preventing unintended movement of elevator car Apparatus for restricting motion of an elevator car includes bars or other stiff, elongated members, which are extended outwardly from opposing ends of the elevator car, when the car is positioned in a specified zone of vertical displacement, above the lo... | 06/30/1998 |
| 5693919 | Evacuation system for elevators An apparatus for performing an evacuation journey of an elevator car includes at least one brake control apparatus mounted on the car and an evacuation drive. In the case of an interruption in the normal travel of the car, an evacuation journey is initiat... | 12/02/1997 |
| 5648645 | Elevator excess speed detector with multiple light barrier An apparatus for detecting excess speed of an elevator car travelling in an elevator shaft includes a vertically extending measuring strip is mounted at one side of the shaft and a multichannel forked light barrier assembly mounted on the car with a pair ... | 07/15/1997 |
| 5637842 | Elevator safety device An elevator safety device in which a counterweight cam is attached to the counterweight and top terminal landing final limit switches are disposed below the bottom terminal landing of the hoistway so that it is operated by the counterweight cam. The top t... | 06/10/1997 |
| 5288956 | Self running type elevator system using linear motors A self running type elevator system using linear motors in which a control of power supply to a plurality of elevator cars can be achieved without increasing the size of the system enormously. The system includes at least one travelling corridors, each of... | 02/22/1994 |
| 4127843 | Position sensor device for elevator car A position sensor disposed on an elevator car has a first rotatable shaft connected to a secondary winding of a transformer or a switch actuating member, and a second rotatable shaft coaxial with the first shaft and connected to a primary transformer wind... | 11/28/1978 |
| 4069897 | Elevator system An elevator system including an elevator car mounted for vertical movement in a building hoistway, suitable control and drive means, and a buffer-switch combination located in the pit of the hoistway, the switch being electrically connected to the control... | 01/24/1978 |
| 4067416 | Elevator system An elevator system including terminal slowdown control which includes a source which provides a beam of electromagnetic radiation, a receiver of such radiation, and spaced markers disposed in a terminal zone which interrupts the beam of electromagnetic ra... | 01/10/1978 |
| 4043427 | Stair elevator A stair elevator including a chair and associated track adapted for support on a stairway, and further including special limit and emergency switches for controlling movement of the chair along the track. An improved braking device is also provided, as we... | 08/23/1977 |
