Fluid reaction surfaces (i.e. – impellers) – Having positive means for impeller adjustment – Motor bodily rotatable with impeller hub or shaft
Reexamination Certificate
2008-09-16
2011-12-13
Chu, Chris (Department: 2815)
Fluid reaction surfaces (i.e., impellers)
Having positive means for impeller adjustment
Motor bodily rotatable with impeller hub or shaft
C416S044000, C416S046000
Reexamination Certificate
active
08075271
ABSTRACT:
Proposed is a hydraulically controlled variable pitch propeller system for air, land or water craft, comprising an engine, an engine controller, a rotating propeller featuring at least two propeller blades (16), for the pitch control of which a propeller governor (30) is provided connecting the propeller (10) via at least one hydraulic line and comprising a governor body (32) housing a control spool (46) the position of which is determined by the cooperation of flyweights (40) rotating by means of the engine and a variably biased governor spring (48) supported by the control spool (46). In accordance with the invention, the propeller governor (30) comprises an electric motor (58) which sets the preload of the governor spring (48) for the desired rpm and is electrically connected to the engine controller.
REFERENCES:
patent: 4286923 (1981-09-01), Gross
patent: 4893989 (1990-01-01), Carvalho
patent: 4901746 (1990-02-01), Metcalf
patent: 4928241 (1990-05-01), Day
patent: 5037271 (1991-08-01), Duchesneau et al.
patent: 5061153 (1991-10-01), Pace et al.
patent: 5141399 (1992-08-01), Duchesneau et al.
patent: 5174718 (1992-12-01), Lampeter et al.
patent: 5186608 (1993-02-01), Bagge
patent: 6077040 (2000-06-01), Pruden et al.
patent: 6196801 (2001-03-01), Muhlbauer
Chu Chris
MT-Propeller Entwicklung GmbH
Schwegman Lundberg & Woessner, P.A.
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