Self-adjusting variable pitch propeller
AssigneeLand & Sea, Inc.
InventorRobert M. Bergeron
Life of this patent
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Abstract
A self-adjusting, variable pitch propeller comprising: a central hub defining a propeller rotation axis; a plurality of blade assemblies symmetrically disposed about the hub, each assembly having a substantially cylindrical segment with a propeller blade fast therewith and defining a leading blade edge, each blade assembly being pivotally attached to the hub adjacent the leading edge of the blade of that assembly, a support means interconnecting each assembly and the hub at a location remote from the pivotal attachment to permit controlled blade pitch adjustment to occur as a function of the magnitude of opposed hydrodynamic and centrifugal forces acting on the assemblies by pivotal movement of each assembly, about its the pivotal attachment, both circumferentially and radially relative to the axis.
Claims16
A self-adjusting variable pitch propeller having:
- a support means defining a propeller rotation axis and a blade assembly supported by said support means for rotation thereby about said axis, said assembly comprising;
- a) a blade;
- b) a pivotal means pivotally securing said blade to said support means;
- and
- c) a control means connecting said blade to said support means, said control means being spaced from said pivotal means for adjustably controlling the pitch of said blade at least in part as a function of opposed hydrodynamic and centrifugal forces acting on the blade.
A self adjusting, variable pitch propeller comprising:
- a central hub defining a propeller rotation axis;
- a plurality of blade assemblies disposed about said hub, each assembly having a substantially cylindrical segment, said cylindrical segment having a leading and a trailing edge and a propeller blade fast to said cylindrical segment defining a leading blade edge;
- a pivotal attachment pivotally securing each blade assembly to said hub;
- and
- control means interconnecting each assembly and said hub to permit controlled blade pitch adjustment to automatically occur, by allowing circumferential and radial movement of said assemblies relative to said axis, as a function of the magnitude of at least the opposed hydrodynamic and centrifugal forces acting on the assemblies.
Dependencies are inferred from the claim text.