-
公开(公告)号：US20160376123A1
公开(公告)日：2016-12-29
申请号：US15193436
申请日：2016-06-27
Applicant: OTIS ELEVATOR COMPANY
Inventor： Amir Lotfi , Bruce P. Swaybill , James L. Hubbard
CPC classification number: B66B1/32 , B66B5/02 , B66D5/30 , F16D55/22 , F16D2121/22
Abstract: A brake for an elevator car includes a multiple of sequentially operated brake segments to control a timing and a rate of brake torque for deceleration of the elevator car.
Abstract translation: 电梯轿厢的制动器包括多个顺序操作的制动段，以控制电梯轿厢减速的制动转矩的定时和速率。
-
公开(公告)号：US20210331902A1
公开(公告)日：2021-10-28
申请号：US17368141
申请日：2021-07-06
Applicant: Otis Elevator Company
Inventor： Amir Lotfi , Michael C. Lang
Abstract: An elevator brake assembly including an asymmetrical brake comprising at least three brake segments, a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element, wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments.
-
公开(公告)号：US10745239B2
公开(公告)日：2020-08-18
申请号：US15529435
申请日：2015-11-19
Applicant: Otis Elevator Company
Inventor： Steven M. Millet , Ismail Agirman , Amir Lotfi
Abstract: A braking system for an elevator includes an electromagnetic brake operably connected to an elevator car. A control circuit is operably connected to the electromagnetic brake and includes a switching mechanism to selectively modify a rate of engagement of the electromagnetic brake to selectively modify deceleration of the elevator car. A method of engaging an electromagnetic brake for an elevator system includes detecting one or more operational characteristics of the elevator system and selecting a first position or a second position of a switching mechanism disposed at a brake control circuit depending on the sensed operational characteristics. Electrical current is directed through one or more components of the brake control circuit, depending on the position of the switching mechanism, to determine a rate of engagement of the electromagnetic brake. A flow of electrical current through the brake control circuit is stopped, thereby causing engagement of the electromagnetic brake.
-
公开(公告)号：US10252879B2
公开(公告)日：2019-04-09
申请号：US15116120
申请日：2014-02-06
Applicant: Otis Elevator Company
Inventor： Amir Lotfi , Randall Keith Roberts , Ronnie E. Thebeau , Michael Garfinkel , Edward Piedra , Dennis Hanvey , Daniel Rush
Abstract: Embodiments are directed to determining that an elevator car of an elevator system is approaching a landing, obtaining, by a controller, a value for at least one parameter associated with the elevator system based on the determination that the elevator car is approaching the landing, determining that the elevator car arrives at the landing within a threshold distance, determining, by the controller, when to engage in at least one of a brake cycling operation and a power cycling operation based on the value for the at least one parameter and based on determining that the elevator car arrives at the landing within the threshold distance, and initiating the at least one of a brake cycling operation and a power cycling operation at a time corresponding to the determination of when to engage in the at least one of a brake cycling operation and a power cycling operation.
-
15.发明授权公开(公告)号：US10099894B2
公开(公告)日：2018-10-16
申请号：US14772211
申请日：2013-03-07
Applicant: Otis Elevator Company
Inventor： Randall K. Roberts , Amir Lotfi , Ismail Agirman
Abstract: A system and a method are provided for damping vertical oscillations of an elevator car hovering at an elevator landing. The system includes a sensor, a controller and an elevator machine connected to a traction sheave. The sensor is adapted to provide a sensor signal indicative of rotation of the traction sheave, wherein the rotation of the traction sheave corresponds to the vertical oscillations of the hovering elevator car. The controller is adapted to provide a control signal based on the sensor signal. The elevator machine is adapted to reduce the vertical oscillations of the hovering elevator car by controlling the rotation of the traction sheave based on the control signal.
-
Patent Agency Ranking
16.发明申请公开(公告)号：US20160039639A1
公开(公告)日：2016-02-11
申请号：US14777058
申请日：2013-03-15
Applicant: OTIS ELEVATOR COMPANY
Inventor： Amir Lotfi , Alan Stover Githens
CPC classification number: B66B15/04 , B66B7/06 , B66B9/00 , F16H55/36 , F16H2055/363
Abstract: An elevator system includes an elevator car located in a hoistway. One or more belts are operably connected to the elevator car to drive and/or support the elevator car along the hoistway. The one or more belts are routed over one or more sheaves. The one or more sheaves include an outer surface rotatable about a central axis and a flange located at at least one lateral end of the sheave. The sheave further includes a tracking compensator to limit lateral motion of the belt along the outer surface to prevent the belt from contacting the flange.
Abstract translation: 电梯系统包括位于井道中的电梯轿厢。 一个或多个皮带可操作地连接到电梯轿厢，以沿着井道驱动和/或支撑电梯轿厢。 一个或多个皮带被布置在一个或多个滑轮上。 一个或多个滑轮包括可围绕中心轴线旋转的外表面和位于滑轮的至少一个横向端部的凸缘。 滑轮还包括跟踪补偿器，以限制皮带沿着外表面的横向运动，以防止皮带接触凸缘。
-
公开(公告)号：US11897725B2
公开(公告)日：2024-02-13
申请号：US16925945
申请日：2020-07-10
Applicant: Otis Elevator Company
Inventor： Steven M. Millett , Ismail Agirman , Amir Lotfi
CPC classification number: B66B1/32 , B66B5/02 , B66B11/0476
Abstract: A braking system for an elevator includes an electromagnetic brake operably connected to an elevator car, and a control circuit operably connected to the electromagnetic brake. The control circuit includes a switching mechanism configured to selectively modify a rate of engagement of the electromagnetic brake to selectively modify a rate of deceleration of the elevator car. The switching mechanism has a first position, a second position and a third position, to selectively modify the rate of engagement.
-
公开(公告)号：US10919730B2
公开(公告)日：2021-02-16
申请号：US15074402
申请日：2016-03-18
Applicant: Otis Elevator Company
Inventor： Amir Lotfi , Daniel M. Bohn
Abstract: An elevator system includes an elevator car; a machine to impart motion to the elevator car; a brake to stop rotation of the machine, the brake comprising a first coil and a second coil, wherein removing power from the first coil and the second coil applies the brake to the machine; and a controller in communication with the brake, the controller configured to connect the first coil and the second coil in one of a first electrical configuration and a second electrical configuration.
-
公开(公告)号：US20200339382A1
公开(公告)日：2020-10-29
申请号：US16925945
申请日：2020-07-10
Applicant: Otis Elevator Company
Inventor： Steven M. Millett , Ismail Agirman , Amir Lotfi
Abstract: A braking system for an elevator includes an electromagnetic brake operably connected to an elevator car, and a control circuit operably connected to the electromagnetic brake. The control circuit includes a switching mechanism configured to selectively modify a rate of engagement of the electromagnetic brake to selectively modify a rate of deceleration of the elevator car. The switching mechanism has a first position, a second position and a third position, to selectively modify the rate of engagement.
-
公开(公告)号：US10538412B2
公开(公告)日：2020-01-21
申请号：US16295327
申请日：2019-03-07
Applicant: Otis Elevator Company
Inventor： Amir Lotfi , Randall Keith Roberts , Ronnie E. Thebeau , Michael Garfinkel , Edward Piedra , Dennis Hanvey , Daniel Rush
Abstract: A method includes determining that an elevator car is arriving at a landing at which re-leveling is anticipated; upon the elevator car arriving at the landing at which re-leveling is anticipated, initiating the at least one of a brake cycling operation and a power cycling operation to reduce elevator car sag at the landing; monitoring transfer of weight to or from the elevator car at the landing over a period of time; terminating the at least one of the brake cycling operation and the power cycling operation upon at least one of (i) the transfer of weight to or from the elevator car at the landing over the period of time being less than a threshold and (ii) the elevator car sag at the landing meeting a sag threshold.
-
-
-
-
-
-
-
-
-
Search Results
30
records
(took 0.014 seconds)
