FREDERICK WEYERHAEUSER PIASECKI
Pilots at Buck Ln, Haverford, PA

5277381, Jan 11, 1994

Aug 12, 1992

7/928307

Frederick W. Piasecki - Haverford PA

Piasecki Aircraft Corporation - Essington PA

B64C 2782

244 1719

An improved rotary wing aircraft shrouded propeller ducted tail assembly utilizing the flow pattern of the propeller slip stream exiting from the outlet end of the duct for flight control by means of movable slip stream deflecting surfaces. Three vertically extending deflecting surfaces are pivotally supported at the outlet end of the duct rearwardly of the propeller comprising a vertically extending, elongated rudder surface pivotally supported for rotation about a vertical axis on the duct centerline and a pair of duct sidewall flaps each pivotally supported by hinges mounted on the respective opposite duct lateral sidewalls for obtuse angular rotation between a position extending outwardly and perpendicularly of the duct sidewall on which it is hinged and a position extending through an opening in the duct sidewall of which it is hinged to protrude transversely of the duct interior. The positions of the three deflecting surfaces are established by a control mixing unit which concurrently positions all three surfaces to extend transversely of the duct longitudinal axis in the same direction on either side of the duct longitudinal axis for hover flight, concurrently positions all three surfaces to extend parallel to the duct sidewalls and longitudinal axis for high speed cruising flight and concurrently positions each of the pair of duct sidewall flaps to extend through an opening in the duct sidewall on which it is hinged to protrude transversely into the duct interior with the rudder surface coincident with the duct longitudinal axis for decelerating high speed cruising flight.

2012017, Jul 12, 2012

Jan 24, 2012

13/356874

Frederick W. Piasecki - Haverford PA, US

B23P 15/04

2988971

A wind turbine rotor blade and a wind turbine incorporating the rotor blade include a first and second composite skin. A first and a second spar pultrusion having a base and a plurality of integral ribs generally normal to base are attached to the inside surface of the first and second composite skins and extend the span of the rotor blade. At least one shear web connects a rib of the first spar pultrusion to a corresponding rib of the second spar pultrusion. The width of the spar pultrusions decreases in a step-wise fashion along the span of the rotor blade from the root to the tip. The leading or trailing edge of the rotor blade may be selectably opened for inspection and repair.

2012018, Jul 19, 2012

Feb 2, 2012

13/365029

Frederick W. Piasecki - Haverford PA, US

G01N 33/00

738658

A wind turbine rotor blade and a wind turbine incorporating the rotor blade include a first and second composite skin. A first and a second spar pultrusion having a base and a plurality of integral ribs generally normal to base are attached to the inside surface of the first and second composite skins and extend the span of the rotor blade. At least one shear web connects a rib of the first spar pultrusion to a corresponding rib of the second spar pultrusion. The width of the spar pultrusions decreases in a step-wise fashion along the span of the rotor blade from the root to the tip. The leading or trailing edge of the rotor blade may be selectably opened for inspection and repair.

2011031, Dec 29, 2011

May 16, 2011

13/068601

John W. Piasecki - Bryn Mawr PA, US
Frederick W. Piasecki - Haverford PA, US
Brian Geiger - Glen Mills PA, US
Douglas Johnson - Prospect Park PA, US
David Pitcairn - Essington PA, US

B64C 37/00, B64C 39/00, B64C 27/28, B64C 27/22, G05D 1/00, B64D 7/00, B64C 25/32, G06F 19/00, B64C 27/00, B64C 27/08, B64C 27/10, B64C 29/00, B64D 17/80

244 2, 244 23 R, 244 7 A, 701 3, 701 2, 701124, 244 1711, 244 1723

An unmanned air module includes one or more rotors, engines, a transmission and avionics. Any of several different ground modules may be attached to the air module. The air module may fly with and without the ground module attached. The ground module may be a vehicle ground module and may be manned. The vehicle ground module may transport the attached air module across the ground. The air module may have two rotors, which may be ducted fans, and three different configurations: a tandem rotor configuration, a side-by-side configuration, and a tilted-rotor configuration.

2004000, Jan 8, 2004

Jul 3, 2002

10/188253

Frank Piasecki - Haverford PA, US
Frederick Piasecki - Haverford PA, US
Dezi Folenta - Lincoln Park NJ, US

F16D003/56, F16D003/64, F16D003/78

464/098000

A flexible coupling for coupling together a pair of axially misaligned shafts of which the respective ends of the shafts retainably fit within a hub within the interior of which the longitudinal axes of the shafts meet at a common point. A plurality of arms extend radially outwardly along the hub and a portion of the hub adjacent each and extend toward each other into the interior of the hub into contact with a bearing contained within the hub of the common point, whereby ends of each respective shaft and hub retaining portion are movable relative to one another.

8403255, Mar 26, 2013

Apr 9, 2010

12/757287

Frederick W. Piasecki - Haverford PA, US

B64C 27/22

244 6, 244 7 A, 244 1711, 244 123, 244 8

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

8192169, Jun 5, 2012

Apr 9, 2010

12/757832

Frederick W Piasecki - Haverford PA, US

B64C 11/24

416226, 416233, 416230, 2988971, 2988972

A wind turbine rotor blade and a wind turbine incorporating the rotor blade include a first and second composite skin. A first and a second spar pultrusion having a base and a plurality of integral ribs generally normal to the base are attached to the inside surface of the first and second composite skins and extend the span of the rotor blade. At least one shear web connects a rib of the first spar pultrusion to a corresponding rib of the second spar pultrusion. The width of the spar pultrusions decreases in a step-wise fashion along the span of the rotor blade from the root to the tip. The leading or trailing edge of the rotor blade may be selectably opened for inspection and repair.

7823827, Nov 2, 2010

Jul 24, 2007

11/782353

Frederick W. Piasecki - Haverford PA, US
Frank N. Piasecki - Haverford PA, US

B64C 27/82, B64C 27/08, B64C 27/52

244 1719, 244 1723, 244 56

The Invention is a rotary-wing aircraft having at least two vectored thrusters that may be tilted from a horizontal to a vertical position and to positions intermediate between the horizontal and vertical positions. The two vectored thrusters are equipped with propellers having separately variable pitch. The two vectored thrusters also are equipped with vanes having selectable vane angles to direct separately the air flow from the two vectored thrusters. A control system detects the flight condition of the aircraft and selects vectored thruster control settings corresponding to the detected flight condition and consistent with predetermined control rules to provide lift, thrust, yaw moments and roll moments.

2005025, Nov 17, 2005

Apr 6, 2005

11/099480

Frank Piasecki - Haverford PA, US
Frederick Piasecki - Haverford PA, US
Dezi Folenta - Lincoln Park NJ, US

F16D003/62

464098000

Embodiments of the present invention relate to a flexible coupling for connecting a driving rotatable shaft to a driven rotatable shaft, where the flexible coupling allows greater relative misalignment and/or offset of the shafts compared to known couplings. The coupling may further enable control of torsional and axial stiffness.