William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 8181312 | End-connector and method for fastening a flat-belt type suspension means of an elevator system An end-connector for fastening a flat-belt type suspension device of an elevator system comprises a housing with two side walls and a first and a second wrapping element each of which extends between the two side walls and is wrappable by the flat-belt type suspensi... | 05/22/2012 |
| 8157061 | Elevator installation with a braking device and method for braking and holding an elevator installation An elevator installation has braking equipment for braking and holding an elevator car which moves in vertical direction within guide tracks or rails. The braking equipment consists of at least two brake units each comprising a normal force regulation device that se... | 04/17/2012 |
| 8157060 | Elevator installation with braking equipment and method of braking in an elevator installation An elevator installation has an elevator car that moves in a vertical direction along guide tracks and is braked or held at standstill by a braking equipment. The braking equipment includes at least two brake units, at least one of the brake units, but preferably ea... | 04/17/2012 |
| 8157058 | Elevator with belt-like transmission means, particularly with wedge-ribbed belt, as support means and/or drive means A transmission belt for driving and/or supporting an elevator car has a longitudinally extending body including an area tensile layer reinforced by chemical fibers. The belt can have a flat friction layer or a friction layer including alternating longitudinally exte... | 04/17/2012 |
| 8109369 | Method of optimizing the weight of a counterweight of an elevator system and elevator system with a counterweight of that kind An elevator system includes a car with an empty weight MK, which car can move a rated load MLmax, a counterweight, which is coupled with the car by a support device so that it rises when the car lowers and lowers when the car rises, as well as a drive device which c... | 02/07/2012 |
| 8109367 | Counterweight and suspension for an elevator without an engine room In an elevator, with an elevator car, a counterweight, a drive unit arranged below the counterweight and provided with a drive pulley, and an elevator support device, which is guided over the drive pulley and at least one deflecting pulley and which supports and mov... | 02/07/2012 |
| 8104587 | Elevator car An elevator car consists of a floor, side walls, a back wall and a roof which are each constructed in a modular manner from a plurality of panels and which can be held together by means of connecting elements. The floor is formed from, in total, eight floor panels. ... | 01/31/2012 |
| 8061485 | Elevator installation operating method for transporting elevator users A method of operating an elevator installation for transporting elevator users in a building area, including the steps of: detecting the position of elevator users in the building area, granting of an access authorization of the elevator users to building regions, t... | 11/22/2011 |
| 8047333 | Method and elevator installation for user selection of an elevator A method for allocation of a user to a elevator installation, which is provided with a plurality of elevator cars and with a destination call control unit, wherein the user lodges a destination call at the destination control unit using a communications unit. The de... | 11/01/2011 |
| 8028807 | Remote recording of maintenance operations for an elevator or escalator installation A method and device for maintenance of an elevator installation or an escalator installation communicates the presence of a maintenance technician at the elevator or escalator installation to a remote service center. The service center is thus informed about that th... | 10/04/2011 |
| 8020671 | Elevator installation, a guide rail of an elevator installation, brake equipment of an elevator installation and a method for guiding, holding and braking an elevator installation An elevator installation includes a guide rail and brake equipment for guiding, holding and braking the elevator installation. The brake equipment has a brake lining which co-operates with a brake surface, advantageously with the brake surface of the guide rail, for... | 09/20/2011 |
| 8016081 | Elevator drive brake device monitor 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 housi... | 09/13/2011 |
| 8011481 | Method for monitoring operating states of an elevator unit by sensing movable brake part A method for monitoring the operating state of an elevator drive having a brake includes the mounting of a sensor on a movable brake part. The sensor generates an output proportional to the extent of relative movement between the brake part upon which it is mounted ... | 09/06/2011 |
| 8011480 | Load sensor apparatus and method for an elevator car An elevator installation and a method for arranging a load sensor in the elevator installation includes a car, a support device for supporting the car, the load sensor and a deflecting roller unit. The deflecting roller unit is arranged at the car and has at least t... | 09/06/2011 |
| 7984794 | Device for sealing a gap between car door and car wall in an elevator car An apparatus for sealing a gap between an elevator car door and the associated car wall during car travel includes a sealing strip of resilient material with wall portions that can be reversibly stretched to bridge and seal the gap. ... | 07/26/2011 |
| 7980362 | Safety equipment for preventing an elevator car collision with an object Safety equipment for an elevator installation with an upper elevator car and a lower elevator car, which cars are both movable substantially independently along a vertical direction in a common elevator shaft of the elevator installation includes a first electro-opt... | 07/19/2011 |
| 7946392 | Drive for an elevator door with a displacement curve adapted to the air flows in the shaft A method of operating an elevator installation and the elevator installation include elevator doors actuated by an elevator drive according to a travel curve. At least one sensor unit detects pressure relationships and/or air flows. An evaluating unit determines a t... | 05/24/2011 |
| 7926622 | Lift cable slack monitoring device and method A lift drive unit has at least one monitoring device for monitoring unallowed raising of a lift cage. The drive unit has a motor unit and a deflecting unit. If a counterweight supported by the deflecting unit, for example rests on a shaft pit buffer, the deflecting ... | 04/19/2011 |
| 7918326 | Driving system for passenger transportation A driving and/or reversing system includes a driving and/or reversing element and a chain having a plurality of first and second chain pins connected by chain plates. The driving and/or reversing element has first and second pitch circles. First and second chain pin... | 04/05/2011 |
| 7918318 | Method and system for modernization of an elevator installation A method for modernization of an elevator installation with several elevators in a building, wherein at least one floor terminal for input of a floor call is provided on at least one floor of the building, which floor terminal is, for communication of an input floor... | 04/05/2011 |
| 7913818 | Elevator installation in a building with at least one transfer floor An elevator installation is arranged in a building with at least two elevators, wherein the building is divided into building zones and each elevator has at least one elevator car, each elevator car is independently movable by an associated drive in an associated ca... | 03/29/2011 |
| 7909145 | Brake device for an elevator with monitoring capabilities 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 magne... | 03/22/2011 |
| 7886336 | Method of initiating a security procedure within a building A method for initiating a security procedure within a building whereby a virtual key is generated by a certain event and transmitted to a selected person. If the selected person identifies himself by means of the virtual key, a security procedure, for example making... | 02/08/2011 |
| 7882935 | Support means system with drive pulley and support means as well as elevator installation with such a support means system A support system has a belt-like support, which supports a load and which has at least one rib or groove with wedge-shaped cross-section extending in the longitudinal direction of the support, is driven by a support pulley, which pulley has at least one correspondin... | 02/08/2011 |
| 7882934 | Elevator installation in a building with at least one transfer floor An elevator installation is arranged in a building with at least two elevators, wherein the building is divided into building zones and each elevator has at least one elevator car, each elevator car is independently movable by an associated drive in an associated ca... | 02/08/2011 |
| 7866446 | Method and device for reducing the energy consumption of an elevator installation A device for reducing the energy consumption is used in an elevator installation which can be alternatively brought into an operating mode and a standby mode wherein in the standby mode the elevator installation is separated from a main energy source and connected w... | 01/11/2011 |
| 7857106 | Vertical position detection of a suspended elevator car A system for detecting the position of an elevator car includes a belt at which the elevator car is suspended and a detector for detecting the position of the belt, wherein the belt has on a first side a toothing in which a gearwheel of the detector mechanically pos... | 12/28/2010 |
| 7857104 | Method of preventing collision of two elevator cars 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... | 12/28/2010 |
| 7857103 | Elevator system An elevator system has a lower elevator car, an upper elevator car and a common counterweight in an elevator shaft. A support device has a first support strand and a second support strand. Each of the elevator cars is connected with the two support strands. In addit... | 12/28/2010 |
| 7828121 | Reinforced synthetic cable for elevators An elevator support, such as a cable or a belt connected with an elevator car or counterweight, has load-bearing synthetic material strands, which are reinforced by the introduction of a second phase and have a higher modulus of elasticity than that of the unreinfor... | 11/09/2010 |
| 7828120 | Method of modernizing an elevator installation A method of modernizing an elevator installation that comprises a first elevator car movable in a shaft by a first drive includes installing at least one second drive without changing the first drive. In addition, at least one second elevator car is installed in the... | 11/09/2010 |
| 7823707 | Guide device for an elevator, elevator with such a guide device, and method for operating such an elevator A guide device for an elevator car has a guide shoe that is displaceable by a linear guide that is arranged on the elevator car. Should the elevator car in an extreme situation travel beyond the uppermost floor, the guide shoe is arrested by a projecting console, an... | 11/02/2010 |
| 7823701 | Light monitoring device for an elevator system The present invention relates to a monitoring device for a elevator system, including an optical sensor unit, which receives light emitted by a external light source existing in the vicinity of the elevator system and which transforms the light into contrast informa... | 11/02/2010 |
| 7819230 | Method of assigning a user to an elevator system and such an elevator system A method of assigning a user to an elevator system with several elevators wherein a user issues a destination call, at least one elevator is determined to serve the destination call and is announced to the user by an acoustic signal that identifies the elevator. All... | 10/26/2010 |
| 7806238 | Elevator and pulley assembly for use in an elevator An elevator comprises an elevator car and support belts that form a 4:1 suspension for the elevator cabin and that are looped several times beneath the elevator car. Several parallel, flat belts are used and the rollers of at least one fixed roller group that divert... | 10/05/2010 |
| 7798291 | Emergency device for installing in an elevator car of an elevator installation An emergency device for installing in an elevator car of an elevator installation, with an emergency control region, which is to be opened from the interior of the elevator car by an emergency key, wherein a key switch is arranged in the emergency control region so ... | 09/21/2010 |
| 7796012 | Method of controlling access to an area accessible by persons, particularly to a space closed by a door A method of controlling access to an area accessible by persons, particularly to a space closed by a door, includes providing a first mobile communications unit on which at least one access code is filed, at least one second mobile communications unit and a receiver... | 09/14/2010 |
| 7793761 | Elevator car lighting equipment for guidance of persons Lighting equipment of an elevator car and a method for guidance of persons in an elevator provides a floor indication that communicates to the passenger, in a simple and clear manner, reaching of his or her destination floor, even in high buildings with numerous flo... | 09/14/2010 |
| 7779967 | Method of operating an elevator installation, an elevator installation operable by this method and safety equipment for this elevator installation An elevator installation with at least one upper elevator car and at least one lower elevator car includes a first electromechanical switching mechanism mounted on the upper car and having a weight fastened at a downwardly extending elongate run, the run being held ... | 08/24/2010 |
| 7775329 | Method and detection system for monitoring the speed of an elevator car A method and detection system monitors the speed of an elevator car and, in case of excess speed caused by brake failure of a motor brake or shaft fracture of a drive pulley shaft, a safety circuit is opened and the detection system is transferred from a normal oper... | 08/17/2010 |