Device of retractable stops for rotor blades of giroplanes, and rotor head including such a device
US5116209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/322
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A device of retractable stops for the blades of articulated rotors for giroplanes, which includes a stationary stop 20 with a finger 22 radially converging towards the exterior and externally radially protruding on the external spar 9 of the articulation means 7 of each blade on the hub 3, as well as a movable stop 21 with a receptacle 36 resiliently returned by a return device 45 in a position fit around the finger, but disengaged from the finger by centrifugal force when the rotation speed of the blades is higher than a set value. The invention therefore provides absolute stops in flapping and drag in the "ground" position and sharp stops in the flight position. One advantageous application is for helicopter rotors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.