Shock absorber for adjustable pitch propeller with...

Details Shock absorber for adjustable pitch propeller with... Shock absorber for adjustable pitch propeller with...

2011-05-24

2011-05-24

Verdier, Christopher (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Sustained ancillary movement of rotary working member

Responsive to gravity or working fluid force

C416S136000, C416S140000, C416S160000, C416S500000

Reexamination Certificate

active

07946818

ABSTRACT:
The lifetime of plural shock absorbing resilient inserts of an adjustable pitch propeller with feathering blades may be increased. According to an embodiment, stops are implemented between metal surfaces that may be reached only in the event of shocks of great violence and following a certain elastic deformation of the shock absorbing inserts, which remain partially compressed. At the bottom of each circular cavity housing a respective annular insert of elastomer of the flange of a first cylindrical sleeve directly keyed on the drive shaft of the propeller a hole coaxial and of greater diameter than the diameter of a central hole of the annular insert and of the relative engaging pin is formed. Pins projecting from the face of the terminal flange of a second circular sleeve extend through the coaxially formed holes at the bottom of the respective circular cavities of the flange of the first sleeve.

REFERENCES:
patent: 1765091 (1930-06-01), Morris
patent: 2440046 (1948-04-01), Hautier
patent: 2998080 (1961-08-01), Moore, Jr.
patent: 4047841 (1977-09-01), Laurin
patent: 4140434 (1979-02-01), Bianchi
patent: 5203675 (1993-04-01), Marini
patent: 5554003 (1996-09-01), Hall
patent: 6158960 (2000-12-01), Marsi
patent: 467 488 (1937-06-01), None
patent: 1 236 657 (1971-06-01), None

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