LandOfFree - US Patents - Listing for Fluid reaction surfaces (i.e., impellers)

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices

Helicopter blade aerofoil

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices

Helicopter blade aerofoil and helicopter blade

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices

Helicopter blade airfoil

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices

Helicopter blade airfoil

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Laminated – embedded member or encased material

Helicopter blade and method of manufacture

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Sectional – staged or nonrigid working member

Helicopter blade and rotor

Fluid reaction surfaces (i.e. – impellers) – Method of operation

Helicopter blade and the like stand-off and folding device

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – By actuator eccentric to rotation axis

Helicopter blade assembly adapted to permit rapid forward flight

Fluid reaction surfaces (i.e. – impellers) – With measuring – testing – signalling or inspection means

Helicopter blade crack detection system

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to fixed actuator

Helicopter blade cyclic pitch control system

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Including movement limit stop or damping means

Helicopter blade droop stop with slidable droop stop seat

Fluid reaction surfaces (i.e. – impellers) – Working member foldable – pivotable or collapsible to non-use... – Member movement in rotation plane

Helicopter blade folding system

Fluid reaction surfaces (i.e. – impellers) – Method of operation

Helicopter blade folding with blade droop

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to fixed actuator

Helicopter blade pitch adjusting system

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to fixed actuator

Helicopter blade pitch control system

Fluid reaction surfaces (i.e. – impellers) – Method of operation

Helicopter blade positioning mechanism for foldable rotor...

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Formed with main spar

Helicopter blade structure

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Tined or irregular periphery

Helicopter blade with a tip having a selected combination of swe

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Tined or irregular periphery

Helicopter blade with a tip having a selected combination of swe