Elevator brake
US-9688512-B2 · Jun 27, 2017 · US
Electronic safety actuator electromagnetic guidance
US11345570B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11345570-B2 |
| Application number | US-201916418744-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 21, 2019 |
| Priority date | Jun 28, 2018 |
| Publication date | May 31, 2022 |
| Grant date | May 31, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
An elevator car is provided and includes a car frame which translates along a guide rail during ascents or descents, a safety disposed along the car frame to selectively engage with the guide rail to selectively permit vertical elevator car movement, an electronic safety actuator (ESA) and a control system. The ESA actuates the safety and includes an ESA body secured to the car frame with horizontal maneuverability and defining a groove through which the guide rail translates during the vertical elevator car movement, a magnetic guide operably disposed within the groove to exert magnetic force on the guide rail and a sensor disposed within the groove to sense horizontal distance between the guide rail and corresponding portions of the ESA body. The control system controls the magnetic guide to exert a magnetic force in accordance with reading of the sensor to maneuver the ESA body horizontally.
First claim
Opening claim text (preview).
What is claimed is: 1. An elevator car comprising: a car frame which translates along a guide rail during ascents or descents; a safety disposed along the car frame to selectively engage with the guide rail to selectively permit vertical elevator car movement; an electronic safety actuator (ESA) configured to actuate the safety and comprising: an ESA body secured to the car frame with horizontal maneuverability and defining a groove through which the guide rail translates during the vertical elevator car movement; a magnetic guide operably disposed within the groove to exert magnetic force on the guide rail; and a sensor disposed within the groove to sense horizontal distance between the guide rail and corresponding portions of the ESA body; and a control system configured to control the magnetic guide to exert a magnetic force in accordance with reading of the sensor to maneuver the ESA body horizontally, wherein the magnetic guide comprises: an electro-magnet disposed in an upper portion of the groove at one of a first and second side of the guide rail; a permanent magnet disposed in the upper portion of the groove at the other one of the first and the second side of the guide rail to magnetically oppose the electro-magnet in the upper portion of the groove; an electro-magnet disposed in a lower portion of the groove at one of a first and second side of the guide rail; and a permanent magnet disposed in the lower portion of the groove at the other one of the first and the second side of the guide rail to magnetically oppose the electro-magnet in the lower portion of the groove. 2. The elevator car according to claim 1 , wherein the car frame, the safety and the ESA are provided in sets on opposite elevator car sides. 3. The elevator car according to claim 1 , wherein the ESA comprises a linkage coupled to the ESA body and the safety for actuation of the safety. 4. The elevator car according to claim 1 , wherein the ESA body defines horizontal grooves through which a fastener extends into the car frame. 5. The elevator car according to claim 1 , wherein the magnetic guide is provided as: a first pair of magnetic guides disposed on opposite sides of an upper portion of the groove; and a second pair of magnetic guides disposed on opposite sides of a lower portion of the groove. 6. The elevator car according to claim 1 , wherein the control system is configured to control the magnetic guide to increase the magnetic force when the readings of the sensor are indicative of the horizontal distance decreasing.
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Frequently asked questions
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- What does patent US11345570B2 cover?
- An elevator car is provided and includes a car frame which translates along a guide rail during ascents or descents, a safety disposed along the car frame to selectively engage with the guide rail to selectively permit vertical elevator car movement, an electronic safety actuator (ESA) and a control system. The ESA actuates the safety and includes an ESA body secured to the car frame with horiz…
- Who is the assignee on this patent?
- Otis Elevator Co
- What technology area does this patent fall under?
- Primary CPC classification B66B5/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 31 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).