Invention Grant
- Patent Title: Propeller assembly and pitch control unit
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Application No.: US18061852Application Date: 2022-12-05
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Publication No.: US11873771B2Publication Date: 2024-01-16
- Inventor: Giuseppe Cervelli , Simone Castellani , Miriam Manzoni , Giuseppe Bellocchio , Vojtech Jirasek
- Applicant: GE Aviation Czech s.r.o. , GE Avio S.r.l.
- Applicant Address: CZ Prague
- Assignee: GE AVIO S.R.L.,GE AVIATION CZECH S.R.O.
- Current Assignee: GE AVIO S.R.L.,GE AVIATION CZECH S.R.O.
- Current Assignee Address: IT Rivalta di Torino; CZ Prague
- Agency: HANLEY, FLIGHT & ZIMMERMAN, LLC
- Priority: IT 2019000010929 2019.07.04
- Main IPC: F02D29/02
- IPC: F02D29/02 ; B64C11/38 ; B64C11/40 ; B63H3/10 ; F02B61/04

Abstract:
A variable pitch propeller assembly operatively coupled with an engine and methods for controlling the pitch of a plurality of propeller blades thereof is provided. In one example aspect, the variable pitch propeller assembly includes features for combining overspeed, feathering, and reverse functionality in a single secondary control valve. The secondary control valve is operable to selectively allow a controlled amount of hydraulic fluid to flow to or from a pitch actuation assembly such that the pitch of the propeller blades can be adjusted to operate the variable pitch propeller assembly in one of a constant speed mode, a feather mode, and a reverse mode.
Information query