Accession Number : ADD008243

Title :   Limb Retention System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Schulman,Marvin ; Schwartz,Marcus

Report Date : 27 Jan 1981

Pagination or Media Count : 8

Abstract : This patent discloses an ejection seat-mounted system for temporary secure attachment of the limbs of an aviator or other user to the seat during ejection, preventing limb flail and consequent injury. Initially, two rigid arm restraints are pivotably mounted to the sides of the seat in a nonobstructive raised position, and two rigid leg restraints are mounted at the sides of the seat in a substantially nonobstructive extended position to help keep the aviator's legs in place. After the aviator pulls a D-ring initiating ejection, a first gas generator is fired, causing pivoting of the two seat-mounted arm restraints through 135 deg, and retraction and rotation of the two seat-mounted leg restraints, each of which captures one of the aviator's limbs, draws it to the seat, and holds it in place on or with respect to the seat. At a predetermined time controlled by a timer or controller, a second gas generator and appropriate explosive bolts are fired by the ejection sequencing system of the seat. Actuation of the bolts and of the second gas generator causes separation of all four restraints from the seat, leg restraints forwardly and arm restraints sideways, enabling separation of the aviator from the seat so that he can operate his parachute and make a safe landing.

Descriptors :   *Patents, *Restraint, *Protective equipment, *Ejection seats, Arms(Anatomy), Legs, Extremities, Pilots, Retention(General)

Subject Categories : Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE