Elevator overrun systems
US-2018327222-A1 · Nov 15, 2018 · US
Limit switch system including first limit device and second limit device
US10457522B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10457522-B2 |
| Application number | US-201615199814-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2016 |
| Priority date | Jun 30, 2016 |
| Publication date | Oct 29, 2019 |
| Grant date | Oct 29, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A limit switch system for an elevator. The limit switch system includes a limit device configured to determine a position of the elevator car at a location of the hoistway upon selection of an inspection state.
First claim
Opening claim text (preview).
What is claimed is: 1. An elevator system comprising: a hoistway; an elevator car to travel in the hoistway; and a limit device configured to determine a position of the elevator car at a location of the hoistway upon operating the elevator car in an inspection state; wherein the limit device includes a first limit device configured to determine a position of the elevator car at a first location of the hoistway in a normal state and a second limit device configured to determine the position of the elevator car at a second location of the hoistway upon operating the elevator car in an inspection state; wherein the first location and the second location are located at a top of the hoistway, the first location positioned at a vertical location below the second location. 2. The elevator system of claim 1 , wherein the first limit device is activated and the second limit device is deactivated in a normal state. 3. The elevator system of claim 1 , wherein the second limit device is activated and the first limit device is deactivated in the inspection state. 4. The elevator system of claim 1 , further comprising: a controller connected to the first limit device and the second limit device; and an inspection device connected to the controller, the first limit device, and the second limit device and configured to allow selection of the inspection state. 5. The elevator system of claim 4 , wherein the inspection device includes a manually operated switch. 6. The elevator system of claim 4 , wherein the first limit device and the second limit device are connected to the controller through the inspection device. 7. The elevator system of claim 1 , further comprising an elevator machine disposed in the hoistway, the second location positioned to provide access to the elevator machine from a top area of the elevator car. 8. A limit switch system for an elevator, the limit switch system comprising: a limit device configured to determine a position of the elevator car at a location of the hoistway upon selection of an inspection state; wherein the limit device includes a first limit device configured to detect a position of an elevator car at a first location of a hoistway in a normal state and a second limit device configured to detect a position of the elevator car at a second location of the hoistway upon selection of an inspection state; wherein the first location and the second location are located at a top of the hoistway, the first location positioned at a vertical location below the second location. 9. The limit switch system of claim 8 , wherein the first limit device is activated and the second limit device is deactivated in a normal state. 10. The limit switch system of claim 8 , wherein the second limit device is activated and the first limit device is deactivated in the inspection state. 11. The limit switch system of claim 8 , further comprising: a controller connected to the first limit device and the second limit device; and an inspection device connected to the controller, the first limit device, and the second limit device and configured to allow selection of the inspection state. 12. The limit switch system of claim 11 , wherein the inspection device includes a manually operated switch. 13. The limit switch system of claim 11 , wherein the first limit device and the second limit device are connected to the controller through the inspection device.
Assignees
Inventors
Classifications
- B66B5/0087Primary
Devices facilitating maintenance, repair or inspection tasks (devices incorporated in the buffer B66B5/288; railings on top of the car B66B11/0226) · CPC title
by preventing crushing · CPC title
Setting or modification of parameters of the control system · CPC title
Position or motion detectors or driving means for the detector (B66B1/40, B66B1/50 take precedence; length measuring G01B; speed measuring G01P) · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10457522B2 cover?
- A limit switch system for an elevator. The limit switch system includes a limit device configured to determine a position of the elevator car at a location of the hoistway upon selection of an inspection state.
- Who is the assignee on this patent?
- Otis Elevator Co
- What technology area does this patent fall under?
- Primary CPC classification B66B5/0087. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 29 2019 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).