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Variable Pitch Propeller Wit Transfer Tube
| Content Provider | The Lens |
|---|---|
| Related Links | https://www.lens.org/lens/patent/012-199-706-355-054/frontpage |
| Language | English |
| Publisher Date | 2019-08-14 |
| Access Restriction | Open |
| Alternative Title | Verstellpropeller Mit Übertragungsrohr Hélice À Pas Variable Avec Tube De Transfert |
| Content Type | Text |
| Resource Type | Patent |
| Date Applied | 2016-11-22 |
| Agent | Dehns |
| Applicant | Ratier Figeac Sas |
| Application No. | 16306536 |
| Claim | A variable pitch propeller comprising a transfer tube (10, 20), characterised in that : the transfer tube comprises a single piece having at least one channel (3) formed therein for transferring hydraulic fluid; and the transfer tube is an additively manufactured transfer tube integrally formed as one piece. A propeller as claimed in claim 1, wherein the transfer tube comprises a first channel (3 I ) for transferring hydraulic fluid to an increase pitch chamber in a pitch change actuation mechanism of the propeller and a second channel (3 D ) for transferring hydraulic fluid to a decrease pitch chamber in the pitch change actuation mechanism. A propeller as claimed in claim 2, wherein the transfer tube comprises a third channel (3 P ) for transferring hydraulic fluid to a pitchlock mechanism of the propeller. A propeller as claimed in any preceding claim, wherein the transfer tube is additively manufactured from titanium or steel; and/or wherein the at least one channel (3) has a portion thereof that does not intersect with an outer surface of the transfer tube. A propeller as claimed in any preceding claim, wherein the transfer tube further comprises an integrated manifold portion (4) additively manufactured as one piece as part of the transfer tube such that together the integrated manifold portion and the transfer tube comprise a single piece. A propeller as claimed in claim 5, wherein the manifold portion (4) comprises exit ports (12) for directing fluid in the channel(s) (3) to a pitch change actuation mechanism of the propeller. A propeller as claimed in any of claims 1 to 4, wherein the transfer tube comprises exit ports (21) for directing fluid in the channel(s) (3) to a manifold. A propeller as claimed in claim 6 or 7, wherein the exit ports in the manifold portion or exit ports (21) in the transfer tube are perpendicular to the longitudinal axis of the transfer tube. A propeller as claimed in any preceding claim, wherein at least a portion of the transfer tube between each end is accordion-shaped (25) in the longitudinal direction to provide flexibility, preferably comprising zig-zag bends or corrugations. A variable pitch propeller as claimed in any preceding claim, wherein the transfer tube is arranged to transfer hydraulic fluid via the channel(s) (3) therein from a flow metering valve to a pitch change actuation mechanism. An aircraft comprising the variable pitch propeller as claimed in any preceding claim. A method of manufacturing the variable pitch propeller as claimed in claim 1, the transfer tube having at least one channel (3) for transferring hydraulic fluid, comprising integrally forming the transfer tube as one piece by an additive manufacturing process. A method of manufacturing as claimed in claim 12, wherein the additive manufacturing process comprises at least one of: selective laser sintering, selective laser melting, direct metal deposition, direct metal laser sintering, direct metal laser melting and electron beam melting. A method of manufacturing as claimed in claim 12 or 13, further comprising additively manufacturing an integrated manifold portion (4) as part of the transfer tube. A method of manufacturing as claimed in claim 12, 13 or 14, further comprising manufacturing exit ports (21) in the transfer tube or the integrated manifold portion (4) at a direction perpendicular to the longitudinal axis of the transfer tube. |
| CPC Classification | AEROPLANES;HELICOPTERS WORKING METALLIC POWDER;MANUFACTURE OF ARTICLES FROM METALLIC POWDER;MAKING METALLIC POWDER ;APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER ADDITIVE MANUFACTURING; i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION; ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING; e.g. BY 3-D PRINTING; STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING PIPES;JOINTS OR FITTINGS FOR PIPES;SUPPORTS FOR PIPES; CABLES OR PROTECTIVE TUBING;MEANS FOR THERMAL INSULATION IN GENERAL Climate Change Mitigation Technologies In The Production Or Processing Of Goods |
| Extended Family | 039-616-628-012-869 103-110-373-007-443 012-199-706-355-054 |
| Patent ID | 3324090 |
| Inventor/Author | Fages Christian |
| IPC | F16L9/04 B22F3/00 B22F3/105 B22F5/10 B33Y10/00 B33Y80/00 B64C11/38 F16L9/02 F16L9/06 F16L9/19 |
| Status | Active |
| Simple Family | 039-616-628-012-869 103-110-373-007-443 012-199-706-355-054 |
| CPC (with Group) | B64C11/38 B22F5/106 B22F10/25 B22F10/28 B22F2999/00 B33Y10/00 B33Y80/00 F16L9/02 F16L9/19 Y02P10/25 B64C11/385 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent/Patent 1st level of publication/Inventor's certificate |
