Patents Assigned to Wittur Holding GmbH
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Patent number: 12234125Abstract: A triggering unit for actuating an elevator braking device, having a triggering base body, a trigger, a contact device and a coupling link. The contact device comprises a swivel lever and at least two contact elements, the swivel lever being pivotably anchored on one side of the guide rail and bearing a first contact element in the region between its anchoring and the guide rail, wherein the first and the second contact elements are arranged on the swivel lever in such a manner that the swivel lever automatically pulls itself against the guide rail under the influence of the forces occurring between the contact elements and the guide rail in the triggered state, and the swivel lever is anchored to the triggering base body such that it executes a movement which generates tension or pressure at the coupling link, so that the coupling link actuates the elevator braking device.Type: GrantFiled: February 12, 2021Date of Patent: February 25, 2025Assignee: Wittur Holding GmbHInventors: Lukas Schwaigerlehner, Christoph Russwurm, René Holzer, Leopold Latschbacher, Karl Kriener
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Patent number: 12037219Abstract: A sheet metal base panel for use in elevators is disclosed wherein the said base panel is made from sheet metal of low thickness without compromising its structural integrity, by a specialised hemming process. The said base panel is constructed from a single sheet of metal and incorporates the top and bottom header to form a unitary component. The construction is such that the headers can be positioned either way and hence possesses rotational symmetry which enables in easier installation. This is achieved by a special bending of the base panel on all edges of both the top side and bottom side, four times—a first 90° bending (1a) followed by a second 90° bending (1b), a third 90° bending (1c) and a fourth 180° hemming (1d) of the open edge formed after the third 90° bending (1c).Type: GrantFiled: April 28, 2022Date of Patent: July 16, 2024Assignee: WITTUR HOLDING GmbHInventors: S. Deepak Prashanth, Ramakrishnan Menon
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Patent number: 12024399Abstract: A guiding device for an elevator door leaf that includes a body within which at least a first cavity open outwards of said body. The guiding device also includes a first spherical element rotatably inserted in the first cavity and arranged so as to protrude from the first cavity outwards and anti-friction means interposed between the first spherical element and at least one wall delimiting the first cavity to limit the movement of the first spherical element within the first cavity.Type: GrantFiled: October 26, 2021Date of Patent: July 2, 2024Assignee: WITTUR HOLDING GmbHInventors: Li Bohui, Zhu Ancheng, Peng Lingchao
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Patent number: 11873194Abstract: A braking device for an elevator with a rail-guided car, which encompasses a guide rail and holds a braking element in position on one side of the guide rail and holds another braking element in position on the opposite side of the guide rail, wherein at least one of the braking elements is held in its standby position by a switchable retaining magnet against the force of an automatic actuator. The braking element is automatically driven in between the basic body and the guide rail, if the car moves at the point in time at which the braking element abuts against the guide rail. The retaining magnet is equipped with an air gap reducing agent, which reduces or eliminates an air gap between the retaining magnet and the braking element such that the retaining magnet keeps the braking element magnetically trapped again, as soon as it is switched accordingly.Type: GrantFiled: June 17, 2020Date of Patent: January 16, 2024Assignee: Wittur Holding GmbHInventors: Christoph Russwurm, Herbert Karner, René Holzer, Karl Kriener
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Patent number: 11854753Abstract: An actuation device for keeping the pushbutton switch activated and deactivated remotely. The actuation device includes a plunger which can be brought by external probing from a standby position, in which it does not switch the pushbutton switch, to an active position, in which it keeps the pushbutton switch actuated. The actuation device has a remotely controllable linear drive, a return spring and a return actuator and is designed in such a way that the plunger can be coupled to the return actuator by the remotely controllable linear drive, which is preferably driven by a Bowden cable, under tension of the return spring, wherein after deactivation of the linear drive, the plunger is pressed by the return spring into a position more remote from the pushbutton switch, thereby entraining the plunger into its standby position.Type: GrantFiled: December 18, 2021Date of Patent: December 26, 2023Assignee: Wittur Holding GmbHInventors: Leopold Latschbacher, Christoph Russwurm, René Holzer, Lukas Schwaigerlehner
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Patent number: 11814265Abstract: The invention relates to an overspeed governor for a lifting gear comprising a sheave driven by a overspeed governor cable and a brake for braking the sheave, wherein the brake comprises at least one eccentric piece, mounted on the sheave in a pivoting manner, wherein the eccentric piece is mounted on a first centrifugal weight in a pivoting manner and mounted on a second centrifugal weight in a pivoting manner, wherein, in the event of a displacement of the first and second centrifugal weights due to centrifugal force, the first and the second centrifugal weights pivot the eccentric piece, the brake comprising a reset unit having a spring system which pulls the centrifugal weights in the direction of the undeflected position thereof, wherein the spring system has a first spring constant up to a switching speed, the spring system has a second spring constant from the electric switching speed of the sheave and the second spring constant is greater than the first spring constant.Type: GrantFiled: November 19, 2019Date of Patent: November 14, 2023Assignee: Wittur Holding GmbHInventors: René Holzer, Leopold Latschbacher, Christoph Russwurm
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Patent number: 11299373Abstract: A blocking assembly for a leaf of an elevator door includes a translation guide, a first leaf carriage mounted slidably to the translation guide between a first position and a second position, a latch connected to the translation guide and rotatable between a blocking configuration of the first leaf carriage in an intermediate position wherein the latch intercepts and blocks the carriage against the guide, and a configuration for releasing the carriage wherein the carriage is free to slide to the second position, latch return in the blocking configuration, and first coupling connected to the first leaf carriage and to the latch. When the carriage is in the first position, the first coupling is coupled together to keep the latch in the release configuration, in contrast to the action of the return. When the carriage is in the intermediate position, the first coupling is uncoupled so that the latch is moved by the return into the blocking configuration.Type: GrantFiled: May 15, 2018Date of Patent: April 12, 2022Assignee: WITTUR HOLDING GMBHInventor: Laura Bersotti
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Patent number: 10793397Abstract: Guide assemblies are provided which include a translation guide, a door leaf for a lift, movable along the guide and comprising at least one support element placed at one end of the door leaf, at least one runner housed slidably in the translation guide and defining one or more connection seats to the support element, wherein the connection seat/s and the support element can be coupled with at least two different orientations of the runner with respect to the door leaf. For each orientation, the runner delimits at least a different friction surface with respect to the translation guide, the friction surfaces being non-equidistant from the support element so that the relative position between the door leaf and the translation guide can be changed by different orientations of the runner. The invention further relates to runners usable in a guide assembly.Type: GrantFiled: November 7, 2016Date of Patent: October 6, 2020Assignee: WITTUR HOLDING GMBHInventor: Massimo Preziosa
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Patent number: 10620617Abstract: A maintenance method of an electromechanical device comprises the steps of: —making available to a control unit of the electromechanical device data communication means based on a wireless communication protocol; —providing an operator a portable electronic device suitable to implement augmented reality and having a database in which is stored a list of maintenance operations that can be performed on the electromechanical device, —activating data communication between the electronic control unit and the portable electronic device and transferring from the first to the second the status signals and/or possible alarm signals; —in the presence of at least one alarm signal, correlating said alarm signal with at least one maintenance operation and communicating to the operator, thanks to augmented reality, the alarm signal and the maintenance operations related to said alarm signal.Type: GrantFiled: October 13, 2016Date of Patent: April 14, 2020Assignee: WITTUR HOLDING GMBHInventors: Roberto Zappa, Giuseppe De Francesco
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Patent number: 10308481Abstract: Car door (1) comprising: two sliding door panels (2, 3); two profiles (6, 7), each of which is arranged below one of the two door panels (2, 3), the profiles (6, 7) being partially counter-shaped so as to slide with respect to one another therefore while the door (1) is opening they move towards one another to compose a sill (5).Type: GrantFiled: September 25, 2015Date of Patent: June 4, 2019Assignee: WITTUR HOLDING GMBHInventor: Paolo Giorgioni
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Patent number: 10167171Abstract: An elevator with a brake device for braking a car and/or keeping it stationary on at least one braking rail. The brake device has at least two brake shoes situated opposite from each other, and at least one brake clamp with two clamp arms for opening and closing clamp jaws acting on the brake shoes. In certain embodiments, only one of the clamp arms is connected to the car in pivoting fashion via a bearing with a pivot axle that is affixed to the car, oriented parallel to the direction of travel. In certain embodiments, the brake clamp is supported on the car in such a way that the clamp jaws, by pivoting together in the same direction, are able to follow a movement that is forced on a brake shoe due to local position deviations of the associated braking rail.Type: GrantFiled: August 3, 2016Date of Patent: January 1, 2019Assignee: Wittur Holding GmbHInventors: Peter Ladner, René Holzer, Karl Kriener, Bernd Winkler, Erich Berghammer
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Publication number: 20180297818Abstract: Guide assemblies are provided which include a translation guide, a door leaf for a lift, movable along the guide and comprising at least one support element placed at one end of the door leaf, at least one runner housed slidably in the translation guide and defining one or more connection seats to the support element, wherein the connection seat/s and the support element can be coupled with at least two different orientations of the runner with respect to the door leaf. For each orientation, the runner delimits at least a different friction surface with respect to the translation guide, the friction surfaces being non-equidistant from the support element so that the relative position between the door leaf and the translation guide can be changed by different orientations of the runner. The invention further relates to runners usable in a guide assembly.Type: ApplicationFiled: November 7, 2016Publication date: October 18, 2018Applicant: WITTUR HOLDING GMBHInventor: Massimo PREZIOSA
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Patent number: 10060491Abstract: An elevator system with an elevator car, elevator en guide rails, at least one braking rail, and a brake mechanism and/or safety gear that determines the elevator car movement when activated and in turn has at least one brake block that cooperates with the braking rail. The active surface of this brake block that comes into contact with the braking rail functioning as the brake lining is at least one welding bead whose surface hardness is greater than surface hardness of the braking rail. A method for manufacturing such an elevator brake block includes welding at least two welding beads on a brake lining support composed of a weldable, preferably low-alloyed steel, which constitutes the brake lining that is brought into frictional contact with the braking rail during operation.Type: GrantFiled: May 31, 2016Date of Patent: August 28, 2018Assignee: Wittur Holding GmbHInventors: Markus Leichtfried, Karl Kriener, René Holzer, Franz Grubner
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Patent number: 10041278Abstract: Locking system (10) for a sliding door (2) with respect to a constraint structure comprising a latch (4), associable to the sliding door (2) or to the constraint structure, rotatable or rotatably translatable between a configuration of locking and a configuration of release of the door (2), a keyhole member (6), connectable to the other between the constraint structure or the sliding door (2), which delimits a holding edge (8) that, in the locking configuration, is engaged by the latch (4) to prevent movement of the, sliding door (2) with respect to said structure, the keyhole member (6) being manually operable to move the holding edge (8) and the latch (4) apart, when the latter is in the locking configuration.Type: GrantFiled: February 11, 2015Date of Patent: August 7, 2018Assignee: Wittur Holding GmbHInventor: Roberto Zappa
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Patent number: 9834413Abstract: A device for synchronously actuating and locking elevator doors, which are situated essentially one behind the other in the passage direction—such as a car door and a shaft door; the device includes entraining skids that are fastened to a first door by means of an entraining skid support and whose spacing relative to one another can be changed in order to be able to couple the first door to the second door and move the two doors together and the device is coupled to a linear drive unit that moves the doors in the opening and closing directions, characterized in that the entraining skid support has a plurality of first openings that make it possible to mount at least one, preferably both, of the entraining skids on the entraining skid support in different functional positions.Type: GrantFiled: May 13, 2015Date of Patent: December 5, 2017Assignee: Wittur Holding GmbHInventor: Franz Mittermayr
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Publication number: 20170130486Abstract: Locking system (10) for a sliding door (2) with respect to a constraint structure comprising a latch (4), associable to the sliding door (2) or to the constraint structure, rotatable or rotatably translatable between a configuration of locking and a configuration of release of the door (2), a keyhole member (6), connectable to the other between the constraint structure or the sliding door (2), which delimits a holding edge (8) that, in the locking configuration, is engaged by the latch (4) to prevent movement of the, sliding door (2) with respect to said structure, the keyhole member (6) being manually operable to move the holding edge (8) and the latch (4) apart, when the latter is in the locking configuration.Type: ApplicationFiled: February 11, 2015Publication date: May 11, 2017Applicant: Wittur Holding GmbHInventor: Roberto Zappa
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Patent number: 9637350Abstract: A device for synchronously actuating and locking elevator doors, which are situated essentially one behind the other in the passage direction—such as a car door and a shaft door; the device includes entraining skids that are associated with a first driven door and whose spacing relative to one another can be changed in order to be able to couple the first door to the second door and move them together, characterized in that at least one of the entraining skids is supported in mobile fashion relative to the component, which holds it directly and is preferably embodied in the form of an entraining skid support, and toward the end of the closing movement, is secured so that it disengages from the second door, particularly by coming into contact with a stationary actuating element, which forcibly imparts a lifting movement to the at least one entraining skid.Type: GrantFiled: May 13, 2015Date of Patent: May 2, 2017Assignee: Wittur Holding GmbHInventor: Franz Mittermayr