Drive device of an elevator with safety system
US-9802790-B2 · Oct 31, 2017 · US
Elevator over-acceleration and over-speed protection system
US8939262B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939262-B2 |
| Application number | US-200913256886-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 16, 2009 |
| Priority date | Mar 16, 2009 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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An elevator system includes an electronic system capable of triggering a machine room brake and an electromagnetic safety trigger with low hysteresis and with minimal power requirements that can be released to engage safeties, when car over-speed and/or over-acceleration is detected. The electromagnetic trigger may be reset automatically and may be released to engage the safeties, during the reset procedure. The system includes a processing system that is configured to decrease response time and to reduce the occurrence of false triggers caused by conditions unrelated to passenger safety, such as passengers jumping inside the elevator car.
First claim
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The invention claimed is: 1. An elevator safety system comprising: a speed detector configured to sense a speed of an elevator system mass; an acceleration detector configured to sense an acceleration of the mass; a mechanical safety configured to be connected to the mass; an electromagnetic trigger connected to the safety; and a controller configured to release the trigger to engage the mechanical safety when (a) the speed detector senses an over-speed condition or (b) ac…
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Frequently asked questions
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- What does patent US8939262B2 cover?
- An elevator system includes an electronic system capable of triggering a machine room brake and an electromagnetic safety trigger with low hysteresis and with minimal power requirements that can be released to engage safeties, when car over-speed and/or over-acceleration is detected. The electromagnetic trigger may be reset automatically and may be released to engage the safeties, during the re…
- Who is the assignee on this patent?
- Schienda Greg A, Marvin Daryl J, Terry Harold, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification B66B5/06. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).