Anti-Windmilling System For A Gas Turbine Engine
Patent No. EP4286704 (titled "Anti-Windmilling System For A Gas Turbine Engine") was filed by RTX on Apr 27, 2017. The application was issued on Dec 24, 2025.
Patent Summary
Gas turbine engine with magnetic lock to stop windmilling and prevent bearing wear. A sensor detects when the engine is off, triggering an actuator that pulls a magnetic block on the shaft to stop rotation. This lock also stops the fan from turning, eliminating the need for active lubrication during maintenance. The mechanism allows normal operation by releasing the lock when the engine starts, protecting critical parts from wind damage while keeping the system ready for use.
Patent Family
Patent Oppositions
Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
Dossier Documents
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
EP4286704
- Application Number
- EP23192811A
- Filing Date
- Apr 27, 2017
- Status
- Granted And Under Opposition
- Nov 21, 2025
- Publication Date
- Dec 24, 2025
- External Links
- Slate, Register , Google Patents