Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Aircraft ejection seat with adjustable headrest










Image Number 4 for United States Patent #7500639.

An aircraft ejection seat includes a frame and a headrest. The vertical position of the seat is adjusted by a pair of motor driven lead screws that cooperate with threaded barrel nuts attached to the seat frame. The upper end of one of these motor driven lead screws drives a slip coupling driving a splined shaft. The splined shaft then drives a gearbox mounted to the seat frame. The gearbox in turn drives an upper lead screw, which acts on an upper barrel nut to move the headrest up and down relative to the seat frame. The upper lead screw is driven in the opposite direction from the lower lead screws. Consequently, as the seat moves up to accommodate a shorter pilot, the headrest moves down to accommodate the shorter torso of the shorter pilot.








 
 
  Recently Added Patents
Coding circuitry for difference-based data transformation
Measuring apparatus for measuring a physical property of a sample
Method for the analysis of solid objects
High sensitivity stress sensor based on hybrid materials
Methods of saccharification of polysaccharides in plants
Apparatus for counting particles in a gas
Fuse part in semiconductor device and method for forming the same
  Randomly Featured Patents
Control cartridge for controlling a safety valve in an operating well
Four element refrigeration heat pump and geothermal control systems
Azetidinyl acetonitrile and acetamide antiarrhythmia compositions and methods
Apparatus for use in controlling the spread of ectoparasite-borne diseases
Gravity feed ultraviolet liquid sterilization system
System for optimizing the testing and repair time of a defective integrated circuit
Paper felts or mats
Crystal etch monitor
Dynamic volume management for flash memories
Reticle protection member, reticle carrying device, exposure device and method for carrying reticle