US1798299A - Rotary flexible propeller - Google Patents

Rotary flexible propeller Download PDF

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Publication number
US1798299A
US1798299A US243732A US24373227A US1798299A US 1798299 A US1798299 A US 1798299A US 243732 A US243732 A US 243732A US 24373227 A US24373227 A US 24373227A US 1798299 A US1798299 A US 1798299A
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rotary flexible
flexible propeller
flexible
propeller
wings
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US243732A
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Antoni Ugo
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30—Blade pitch-changing mechanisms

Definitions

  • wings should be constructed with a fore edge whose resistance decreases in the direction of arrow A, and also in the plane in direction v of arrow B to provide the flexible surface C, thus producing a larger and more flexible surface (Fig. 1)- which even when rotating with a smaller radius than the peripherical zone as regards the axis R possesses a greater flexibility with more parts normal to axis H (Fig. 2) which may be deflected, the eificiency consequently becoming very high.
  • Fig. 3 shows a wing without the surface C inscribed in Fig. 1, and consequently of a very scarce efiiciency during flexures.
  • a flexible rotating propeller blade having its fore edge proportioned in thickness to the resistance made in movement, the rear edge of the blade terminating in a prolonged section having greater flexibility than the blade, said section having its medial line in the central zone of the blade.

Description

March 31, 1931. u. ANTON! 1,798,299
' ROTARY FLEXIBLE PROPELLER J Filed D90.- 30, 1927 a. in/am' Patented Mar. 31, 1931 i Q UNITED AsTATs PATENT OFFICE UGO ANTONI, 02B VIABEGGIO, 'I'LPALY 1210mm FLEXIBLE PBOPELLER Application filed December 30, 1927, Serial No. 243,732, and in Italy December 31, 1928.
It is well known that according'to practice and experience, rotary flexible propellers cannot reach a degree of perfection required for their use if the plane of the wings per- 5 pendicular to the driving axle cannot be deformed.
In preceding inventions of applicant the method was tried to have a gradual diminution of the wings thickness but it was not possible to obtain a distribution of the clasticity inversely proportional to the resistance met by the wings on the axis of rotation.
To prevent said inconvenience and obtain a greater efficiency applicant has found that wings should be constructed with a fore edge whose resistance decreases in the direction of arrow A, and also in the plane in direction v of arrow B to provide the flexible surface C, thus producing a larger and more flexible surface (Fig. 1)- which even when rotating with a smaller radius than the peripherical zone as regards the axis R possesses a greater flexibility with more parts normal to axis H (Fig. 2) which may be deflected, the eificiency consequently becoming very high.
Fig. 3 shows a wing without the surface C inscribed in Fig. 1, and consequently of a very scarce efiiciency during flexures.
Having now particularly described and ascertained the nature of my said invention andin what manner the. same is to be performed I declare that what I claim is:
A flexible rotating propeller blade having its fore edge proportioned in thickness to the resistance made in movement, the rear edge of the blade terminating in a prolonged section having greater flexibility than the blade, said section having its medial line in the central zone of the blade.
In testimony whereof I have hereunto signed my name.
. UGO ANTONI.
US243732A 1926-12-31 1927-12-30 Rotary flexible propeller Expired - Lifetime US1798299A (en)

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IT1798299X 1926-12-31

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275082A (en) * 1965-08-19 1966-09-27 Robert E Stark Propellers for water craft
US3584969A (en) * 1968-05-25 1971-06-15 Aisin Seiki Flexible blade fan
US3822103A (en) * 1972-01-08 1974-07-02 Aisin Seiki Flexible fan
US3914068A (en) * 1972-01-25 1975-10-21 Sueddeutsche Kuehler Behr Fan for motor vehicles
US3915591A (en) * 1971-12-09 1975-10-28 Aisin Seiki Flexible blade fan
US4334824A (en) * 1979-07-27 1982-06-15 Aisin Seiki Kabushiki Kaisha Flexible fan device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275082A (en) * 1965-08-19 1966-09-27 Robert E Stark Propellers for water craft
US3584969A (en) * 1968-05-25 1971-06-15 Aisin Seiki Flexible blade fan
US3915591A (en) * 1971-12-09 1975-10-28 Aisin Seiki Flexible blade fan
US3822103A (en) * 1972-01-08 1974-07-02 Aisin Seiki Flexible fan
US3914068A (en) * 1972-01-25 1975-10-21 Sueddeutsche Kuehler Behr Fan for motor vehicles
US4334824A (en) * 1979-07-27 1982-06-15 Aisin Seiki Kabushiki Kaisha Flexible fan device

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