Elevator overspeed governor with automatic reset

Patent metadata

Field	Value
Publication number	US-11542122-B2
Application number	US-202117483184-A
Country	US
Kind code	B2
Filing date	Sep 23, 2021
Priority date	Jan 4, 2016
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A method of remotely tripping an overspeed assembly of a governor assembly includes generating a signal to indicate remote trip, applying power to an actuator, contacting a tripping lever with a movable member operably coupled to the actuator to rotate the tripping lever out of contact with an adjacent swing jaw, and biasing the swing jaw into contact with a ratchet disc capable of limited rotation in response to the tripping lever.

First claim

What is claimed is:

1. A method of remotely tripping an overspeed assembly of a governor assembly, comprising:
generating a signal to indicate remote trip;
applying power to an actuator;
contacting a tripping lever with a movable member operably coupled to the actuator to rotate the tripping lever out of contact with an adjacent swing jaw; and
biasing the swing jaw into contact with a ratchet disc capable of limited rotation in response to the tripping lever.

2. The method of claim 1 , wherein the movable member is configured to slide linearly relative to the tripping lever.

3. The method of claim 1 , wherein the movable member is configured to rotate relative to the tripping lever.

4. The method of claim 1 , wherein a contactor having a cam surface is kinematically connected to the movable member, and contacting the tripping lever with the movable member further comprises engaging the tripping lever with the cam surface.

5. The method of claim 4 , wherein the contactor is integrally formed with the movable member.

6. The method according to claim 1 , further comprising resetting the overspeed assembly, wherein resetting the overspeed assembly includes:
rotating a rotating sheave relative to the ratchet disc such that a resetting feature of the swing jaw engages a portion of the ratchet disc;
rotating the swing jaw against its bias; and
arranging the tripping lever in contact with a portion of the swing jaw to oppose the bias of the swing jaw.

7. The method of claim 6 , wherein when the swing jaw is biased into contact with the ratchet disc, rotation of the sheave in a first direction is restricted.

8. The method of claim 6 , wherein the swing jaw includes a shoulder and the tripping lever includes a protrusion, the protrusion being configured to cooperate with the shoulder to oppose the bias of the swing jaw.

9. The method of claim 6 , wherein the swing jaw includes an engagement end including the resetting feature and rotating the rotating sheave relative to the ratchet disc causes the resetting feature to contact a portion of the ratchet disc and rotate the swing jaw opposite its bias.

10. The method of claim 6 , wherein the resetting feature is a lip.

11. The method of claim 6 , wherein the resetting feature is a tooth having an angled surface.

Assignees

• Otis Elevator Co

Inventors

• Dube Randall S
• Desai Aayush

Classifications

• B66B5/044 Primary

  Mechanical overspeed governors · CPC title

• B66B5/046 Primary

  of the pendulum or rocker arm type · CPC title

• B66B5/24

  by acting on guide ropes or cables · CPC title