Secondary load path detection
US10871214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2017 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Apr 20, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H25/2472
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A nut arrangement for a screw actuator is disclosed for allowing detection of wear in a primary nut of the screw actuator. The nut arrangement comprises a primary nut for providing a primary load path and a secondary nut for providing a secondary load path. An interface ring may link the secondary nut to the primary nut. A sensor is provided to detect relative axial movement between the primary and secondary nuts. During normal operation, the interface ring is seated by a flexible coupling that allows relative axial displacement of the secondary nut to the primary nut to accommodate wear in the primary nut. The sensor can be used to monitor backlash between the primary and secondary nuts to determine wear of the primary nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.