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| Number | Title | Issue Date |
| 6196066 | Rotor aircraft rotor blade with static and dynamic balancing device and balancing process of a blade The balancing device includes static weights, equally distributed by mass in two housings elongated along the span of the blade, and dynamic weights distributed by mass in the two housings so as to ensure the dynamic adjustment of the blade while keeping ... | 03/06/2001 |
| 5824897 | Blade static balancing fixture The invention discloses a helicopter rotor blade static balancing fixture. First, the blade is rooted to provide a basis for accurate station or spanwise measurements. Then, weight information is measured by the load cells, and the distance from the weigh... | 10/20/1998 |
| 5741965 | Aircraft jet engine testing tool The present invention is directed towards an aircraft engine testing tool which facilitates the visual inspection of aircraft internal engine blades by permitting the automatic repositioning of the internal engine blades to an inspection orientation. The ... | 04/21/1998 |
| 5503015 | Blade balancer A blade balancer qualitatively determines imbalance of a lawn mower blade. The blade balancer comprises a tube that rotates on precision bearings about a horizontal axis. A sphere is slidingly captured in one end of the tube concentric with the axis of ro... | 04/02/1996 |
| 5475622 | Method and apparatus for balancing helicopter rotor blades The rotor blades of a helicopter are balanced both in the chordal direction and in the spanwise direction in a static balancing assembly. The assembly includes a support surface on which there are four weighing scales. The scales are positioned in close p... | 12/12/1995 |
| 5398550 | Blade balancer A blade balancer qualitatively determines imbalance of a lawn mower blade. The blade balancer comprises a tube that rotates on precision bearings about a horizontal axis. A sphere is slidingly captured in one end of the tube concentric with the axis of ro... | 03/21/1995 |
| 5304038 | Built-up marine propeller blade balancing A blade of a built-up marine propeller is balanced by forming an open cavity of a predetermined size at a predetermined location proximate to the blade tip, conducting a spin-balancing test in which the blade being balanced and a calibration blade are ass... | 04/19/1994 |
| 4305292 | Methods and apparatus for balancing ceiling fan blades to improve their aerodynamic performance Method and apparatus for use in balancing the blades of ceiling fans, wherein the pitch angles of the blades and the dihedral angles of the blades are measured and corrected, if necessary, by use of a beam of light reflected from a mirror temporarily flus... | 12/15/1981 |
| 4178667 | Method of controlling turbomachine blade flutter A method for controlling the first torsional node line position in a rotatable blade of a turbomachine to improve its flutter stability including the steps of forming a first monolithic blade having a desired airfoil shape with convex and concave side wal... | 12/18/1979 |
| 4082001 | Non-destructive method for applying and removing instrumentation on helicopter rotor blades A nondestructive method of applying and removing instrumentation on airfoils.... | 04/04/1978 |
| 4078422 | Adjusting the static moment of a rotor blade In finishing the construction of a rotary wing, particularly helicopter rotor blade, the blade is weighed to determine the position of its static moment. The measured value is compared with a predetermined value and, if necessary, the static moment is adj... | 03/14/1978 |
