Resources Contact Us Home
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
Cancer vaccines containing epitopes of oncofetal antigen
Display apparatus, control method thereof, and program
Automatic actuator for breakers or switches
Tri-material dual-species neutron spectrometer
System and method for order placement in an electronic trading environment
Rechargeable battery including a channel member
Shield for vacuum circuit breaker
  Randomly Featured Patents
Heat mode sensitive imaging element for making positive working printing plates
Optical information processing system with color center crystal
Enhanced method and apparatus for reducing congestion in DHCP network system
Fast tag compare and bank select in set associative cache
Silicone resin molding compositions
Groundcovering element, method for its manufacture and method for the manufacture of a mould to be applied with the manufacturing method
Gravity-controlled constant-pressure and pressure-regulation device
Wave measuring buoy
Apparatus for automatic laying of wire ties
Portable bicycle pump having collapsible handle and footstand