Advanced emergency collective actuator with friction pull-off and method for a helicopter
US10919622B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2018 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Oct 13, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/56
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An emergency collective actuator includes an actuator motor to produce an actuation force and an actuator linkage that directly engages a friction control lever that is pivotally supported on the collective stick of a helicopter to apply the actuation force directly to the friction control lever such that the actuation force initially disengages the friction control and then reduces the adjustable pitch toward a minimum collective pitch position. The actuator can include a clutch that slips to allow the pilot to overcome the actuation force and that slips responsive to an engagement of the friction control by the pilot, but otherwise the clutch co-rotates with the motor shaft to bias the adjustable pitch toward a minimum collective pitch position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.