Douglas E Swanson

US Patent:

42615356, Apr 14, 1981

Filed:

Oct 5, 1979

Appl. No.:

6/082353

Inventors:

Douglas E. Swanson - Seattle WA

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

B64C 700

US Classification:

244130

Abstract:

The ejection seat on a high performance aircraft is provided with a plurality of inflatable air bags on the back of the seat. The air bags are generally elliptical in cross-section and arranged one above the other in two parallel vertical rows on a supporting pallet attached to the seat back. Suitable gas generators cause the air bags to inflate in sequence top-to-bottom as the seat ejects from the aircraft to produce a rearwardly extending generally streamline afterbody thereby reducing aerodynamic drag and stabilizing the seat with its occupant after emergency ejection.

US Patent:

48711314, Oct 3, 1989

Filed:

Sep 19, 1988

Appl. No.:

7/246413

Inventors:

Coral A. Bernier - Des Moines WA
Douglas E. Swanson - Bellevue WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

B64D 2506

US Classification:

244122AG

Abstract:

A system for retracting a pilot into an ejection seat during either normal flight or an emergency ejection procedure. A pair of haulback straps are wound on a haulback reel that is rotatably driven by a gas-powered motor. The motor receives pressurized gas from the aircraft's bleed air during normal flight and from a pyrotechnic cool gas generator during an ejection. The rate of gas flow to the motor is controlled by a servovalve. The actual rotational velocity of the haulback reel is measured by a tachometer and compared to a desired haulback velocity profile. A control signal that is proportional to the difference between the actual haulback velocity and the desired haulback velocity is applied to the servovalve so that the desired haulback velocity is achieved. The desired haulback velocity may vary as a function of time from the start of an ejection procedure. The system also includes an acceleration sensor for actuating a haulback reel locking mechanism when excessive g-loads are sensed, a reel lock actuated if the haulback straps unwind from the haulback reel at an excessive rate, and a spring-loaded winding mechanism to apply a relatively small winding torque to the haulback reel to prevent any slack from developing in the haulback straps.