Protective device for speed sensing device

• US 10,246,295 B2
• Filed: 04/06/2016
• Issued: 04/02/2019
• Est. Priority Date: 04/06/2016
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Hu, Guohong, Marvin, Daryl J.
• Primary Examiner(s): Tran, Diem M
• Application Number:
  US15/092,244
• Publication Number:
  US 20170291797A1
• Time in Patent Office: 1,091 Days
• Field of Search: 359511
• CPC Class Codes: B66B 5/0031 for safety reasons
• CPC Class Codes: B66B 5/04 for detecting excessive speed
• CPC Class Codes: B66B 5/044 Mechanical overspeed governors
• CPC Class Codes: B66B 5/16 Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
• CPC Class Codes: B66B 5/18 and applying frictional retarding forces
• CPC Class Codes: B66B 5/22 by means of linearly-movable wedges B66B5/24 takes precedence
• CPC Class Codes: B66B 9/00 Kinds or types of lifts in, or associated with, buildings or other structures characterised by control systems B66B1/00; apparatus for raising or lowering persons on stages of theatres A63J5/12

Abstract

A safety actuation assembly for an elevator system including a housing, a speed sensing device disposed within the housing, wherein the speed sensing device comprises a proximal end, and a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position.

Claims

1. An elevator system having a safety actuation assembly comprising:

a housing;

a speed sensing device for sensing the speed of the elevator system disposed within the housing, wherein the speed sensing device comprises a proximal end; and

a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device;

wherein the protection device configured to be placed in a first position when in a non-engaging position and a second position when in an engaging position.

2. The safety actuation assembly of claim 1, further comprising a lever operably coupled to the protection device.

3. The safety actuation assembly of claim 2, further comprising a protrusion disposed on the lever.

4. The safety actuation assembly of claim 3, further comprising an elevator component disposed within the housing, the elevator component located adjacent to the protrusion and configured to operate between the engaging position and the non-engaging position.

5. The safety actuation assembly of claim 4, wherein the elevator component is configured to engage the protrusion when placed in the engaging position.

6. The safety actuation assembly of claim 5, wherein the elevator component comprises a braking device.

7. The safety actuation device of claim 6, wherein the braking device comprises:

a magnetic braking device; and

an electromagnetic component disposed adjacent to the magnetic braking device, wherein the electromagnetic component is configured to hold the magnetic braking device in the non-engaging position.

9. The safety actuation device of claim 1, wherein the protection device is composed of a foam material.

8. The safety actuation device of 2, further comprising a retention device disposed adjacent to the protection device.

10. An elevator system comprising:

a hoistway;

a first elevator component disposed within the hoistway and configured to travel within the hoistway; and

a safety actuation assembly operably coupled to the first elevator component, the safety actuation assembly comprising;

a housing;

a speed sensing device disposed within the housing configured to determine a speed of the first elevator component, wherein the speed sensing device comprises a proximal end;

a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device;

the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position.

11. The elevator system of claim 10, wherein the first elevator component comprises at least one of an elevator car and a counterweight.

12. The elevator system of claim 10, wherein the safety actuation assembly further comprises a lever operably coupled to the protection device.

13. The elevator system of claim 12, wherein the safety actuation assembly further comprises a protrusion disposed on the lever.

14. The elevator system of claim 13, wherein the safety actuation assembly further comprises a second elevator component disposed within the housing, the second elevator component located adjacent to the protrusion and configured to operate between the engaging position and the non-engaging position.

15. The elevator system of claim 14, wherein the second elevator component is configured to engage the protrusion when placed in the engaging position.

16. The elevator system of claim 15, wherein the second elevator component comprises a braking device.

17. The elevator system of claim 16, wherein the braking device comprises:

a magnetic braking device; and

an electromagnetic component disposed adjacent to the magnetic braking device, wherein the electromagnetic component is configured to hold the magnetic braking device in the non-engaging position.

18. The elevator system of claim 10, wherein the safety actuation assembly further comprises a retention device disposed adjacent to the protection device.

19. The elevator system of claim 10, wherein the protection device is composed of a foam material.