Safety brake trigger

Patent metadata

Field	Value
Publication number	US-12486140-B2
Application number	US-202016951679-A
Country	US
Kind code	B2
Filing date	Nov 18, 2020
Priority date	Nov 26, 2019
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

An elevator system ( 1, 1 ′) includes a portable emergency stop switch ( 2, 2 ′), arranged to transmit a signal ( 4 ) when activated, a signal receiver ( 6, 6 ′), arranged to receive the signal ( 4, 4 ′) transmitted by the portable emergency stop switch ( 2, 2 ′); and an elevator safety actuator ( 8, 8 ′) and an elevator safety brake ( 10, 10 ′). In response to receipt of the signal ( 4, 4 ′), the signal receiver ( 6, 6 ′) is arranged to trigger the elevator safety actuator ( 8, 8 ′) to deploy the elevator safety brake ( 10, 10 ′).

First claim

What is claimed is:

1 . An elevator system ( 1 , 1 ′) comprising:
a portable emergency stop switch ( 2 , 2 ′), arranged to transmit a signal ( 4 ) when activated;
a first signal receiver ( 6 , 6 ′), arranged to receive the signal ( 4 , 4 ′) transmitted by the portable emergency stop switch ( 2 , 2 ′);
an elevator safety actuator ( 8 , 8 ′) and an elevator safety brake ( 10 , 10 ′), wherein in response to receipt of the signal ( 4 , 4 ′), the first signal receiver ( 6 , 6 ′) is arranged to trigger the elevator safety actuator ( 8 , 8 ′) to deploy the elevator safety brake ( 10 , 10 ′); and
a second signal receiver ( 26 ) arranged to disconnect a power supply to an elevator car and/or to an elevator drive system in response to the receipt of the signal ( 4 , 4 ′).

2 . An elevator system ( 1 , 1 ′) as claimed in claim 1 , wherein the portable emergency stop switch ( 2 , 2 ′) comprises a button ( 12 , 12 ′).

3 . An elevator system ( 1 ) as claimed in claim 1 wherein the portable emergency stop switch ( 2 , 2 ′) comprises a housing ( 14 ), and a signal transmitter ( 16 , 16 ′) arranged within the housing ( 14 ), wherein the signal transmitter ( 16 ) is arranged to transmit the signal ( 4 , 4 ′) when the portable emergency stop switch ( 2 , 2 ′) is activated.

4 . An elevator system ( 1 ) as claimed in claim 1 , wherein the signal ( 4 ) is a wireless signal.

5 . An elevator system ( 1 , 1 ′) as claimed in claim 1 , wherein the portable emergency stop switch ( 2 , 2 ′) is wearable.

6 . An elevator system ( 1 , 1 ′) as claimed in claim 1 , wherein the portable emergency stop switch ( 2 , 2 ′) comprises attachment means ( 18 , 18 ′), allowing a maintenance person to attach the portable emergency stop switch ( 2 , 2 ′) to their person or clothing or harness.

7 . An elevator system ( 1 ′) as claimed in claim 1 , wherein the system further comprises a signalling cable ( 20 ), connecting the portable emergency stop switch ( 2 ′) to the signal receiver ( 6 ′).

8 . An elevator system ( 1 ′) as claimed in claim 7 , further comprising an elevator car, wherein the signal receiver ( 6 ′) is located on the roof of the elevator car.

9 . An elevator system ( 1 ′) as claimed in claim 8 , wherein the signalling cable ( 20 ) is at least 1 m in length.

10 . An elevator system ( 1 , 1 ′) as claimed in claim 1 , wherein the signal receiver ( 6 , 6 ′) is part of a main safety actuation board ( 22 ) of an elevator car, wherein the main safety actuation board ( 22 ) is arranged to control other safety equipment of the elevator system.

11 . An elevator system ( 1 , 1 ′) as claimed in claim 1 , wherein the second signal receiver ( 26 ) is arranged to disconnect a power supply in a machine room of the elevator system.

12 . A method of deploying an elevator safety brake ( 10 , 10 ′) by service personnel, comprising:
activating a portable emergency stop switch ( 2 , 2 ′) by the service personnel;
transmitting a signal ( 4 , 4 ′), by the portable emergency stop switch ( 2 , 2 ′), in response to activation of the portable emergency stop switch ( 2 , 2 ′);
receiving the signal ( 4 , 4 ′) with a first signal receiver ( 6 , 6 ′) and a second signal receiver ( 26 );
triggering of an elevator safety actuator ( 8 , 8 ′) to deploy the elevator safety brake ( 10 , 10 ′), in response to the receipt of the signal ( 4 , 4 ′) by the first signal receiver ( 6 , 6 ′); and
disconnecting a power supply to an elevator car and/or to an elevator drive system, in response to receipt of the signal ( 4 , 4 ′) by the second signal receiver ( 26 ).

13 . A method as claimed in claim 12 , wherein the safety brake ( 10 , 10 ′) is deployed during a construction phase of the elevator system.

Assignees

• Otis Elevator Co

Inventors

• Munoz Sotoca Javier

Classifications

• B66B1/32

  effective on braking devices {, e.g. acting on electrically controlled brakes (brake control H02P, lift brakes per se B66B5/02)} · CPC title

• B66B5/0068

  by activating the safety brakes when the elevator car exceeds a certain upper or lower position in the elevator shaft · CPC title

• B66B5/005

  Safety of maintenance personnel · CPC title

• B66B5/18 Primary

  and applying frictional retarding forces · CPC title

• B66B1/3446 Primary

  Data transmission or communication within the control system · CPC title