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Class Information
Number: 416/140
Name: Fluid reaction surfaces (i.e., impellers) > Articulated, resiliently mounted or self-shifting impeller or working member > Including movement limit stop or damping means
Description: Apparatus wherein means is provided to limit the extent or reduce the frequency of the impeller or working member movement.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7618237 |
Wind driven power system |
Nov. 17, 2009 |
| 7607892 |
Rotorcraft rotor with blades hinged in flap and in lag |
Oct. 27, 2009 |
| 7467923 |
Fluid flow energy conversion apparatus |
Dec. 23, 2008 |
| 7462015 |
Rotocraft rotor with hinged blades and lockable retractable flapping abutments |
Dec. 9, 2008 |
| 7448855 |
Droop stop mechanism for helicopter rotor blade |
Nov. 11, 2008 |
| 7368158 |
Elastomeric member provided with monitoring means |
May. 6, 2008 |
| 7360994 |
Method of controlling vibration damping in a helicopter, and apparatus implementing the method |
Apr. 22, 2008 |
| 7354248 |
Elastomeric bearing elements for droop stop mechanisms |
Apr. 8, 2008 |
| 7258527 |
Vertical axis wind engine |
Aug. 21, 2007 |
| 7198460 |
Hydraulic or pneumatic machine with tilting blades |
Apr. 3, 2007 |
| 7198469 |
Wind generator of the type with automatic power regulation |
Apr. 3, 2007 |
| 7153100 |
Ceiling fan with retractable fan blades |
Dec. 26, 2006 |
| 7083382 |
Vertical axis wind turbine |
Aug. 1, 2006 |
| 6988873 |
Monodirectional impeller with flexible vanes |
Jan. 24, 2006 |
| 6966755 |
Compressor airfoils with movable tips |
Nov. 22, 2005 |
| 6926500 |
Fluid inertia drag damper for rotary wing aircraft rotor |
Aug. 9, 2005 |
| 6883752 |
Vibration damper for aircraft engine |
Apr. 26, 2005 |
| 6832894 |
Combined ball-and-damper device for a helicopter rotor |
Dec. 21, 2004 |
| 6827553 |
Flexbeam damper assembly having transition shim clamp device |
Dec. 7, 2004 |
| 6824348 |
Wind rotor operable in slow wind speeds |
Nov. 30, 2004 |
| 6805948 |
Flexbeam |
Oct. 19, 2004 |
| 6779966 |
Horizontal windmill |
Aug. 24, 2004 |
| 6695583 |
Snubber-vibration damper system for a bearingless main rotor |
Feb. 24, 2004 |
| 6688842 |
Vertical axis wind engine |
Feb. 10, 2004 |
| 6676074 |
Dual piston drag damper for rotary-wing aircraft rotor |
Jan. 13, 2004 |
| 6619921 |
Driving vane assembly for a windmill |
Sep. 16, 2003 |
| 6499939 |
Water wheel |
Dec. 31, 2002 |
| 6309182 |
Helicopter rotor droop stop mechanism |
Oct. 30, 2001 |
| 6308632 |
Deployable folded propeller assembly for aerial projectiles |
Oct. 30, 2001 |
| 6200097 |
Hub for rotor head of rotary-wing aircraft and rotor head with such hub |
Mar. 13, 2001 |
| 6196800 |
Rotor blade for a bearingless rotor of a helicopter |
Mar. 6, 2001 |
| 6126399 |
Feathering propeller |
Oct. 3, 2000 |
| 6120251 |
Rotorcraft rotor with fixed flap stops on blades and hub, and with determined pitch-flap law |
Sep. 19, 2000 |
| 6082968 |
Centrifugally activated variable damper assembly |
Jul. 4, 2000 |
| 6050778 |
Semi-articulated rotor system |
Apr. 18, 2000 |
| 6045328 |
Fluid damper including flexible damping plate |
Apr. 4, 2000 |
| 6039538 |
Multi-blade rotor for a helicopter |
Mar. 21, 2000 |
| 6033182 |
Swash-plate device for controlling the pitch of rotor blades with non rotating plate stop track and pin |
Mar. 7, 2000 |
| 6022191 |
Fan blade mounting |
Feb. 8, 2000 |
| 5988982 |
Altering vibration frequencies of workpieces, such as gas turbine engine blades |
Nov. 23, 1999 |
| 5951252 |
Helicopter flap lock assembly |
Sep. 14, 1999 |
| 5951251 |
Device for locking the blades of a rotor, at least in terms of pitch |
Sep. 14, 1999 |
| 5913659 |
Apparatus and method for adjusting rotor blade tracking |
Jun. 22, 1999 |
| 5877566 |
Submersible magnetic motor having improved rotary blades |
Mar. 2, 1999 |
| 5851131 |
Self-adjusting variable pitch propeller |
Dec. 22, 1998 |
| 5820341 |
Device with retractable double anti-cone stops ring, and rotor head including it |
Oct. 13, 1998 |
| 5788462 |
Hingeless rotor with intermediate pitch-control rings |
Aug. 4, 1998 |
| 5769606 |
De-icing connection installation for rotorcraft rotor |
Jun. 23, 1998 |
| 5716193 |
Installation for affording electrical continuity for rotorcraft rotor |
Feb. 10, 1998 |
| 5642983 |
Sail system for wind turbines |
Jul. 1, 1997 |
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