Francis G Matthews

US Patent:

61898376, Feb 20, 2001

Filed:

Oct 29, 1998

Appl. No.:

9/182830

Inventors:

Francis Matthews - Bellevue WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

B64C 1344

US Classification:

244213

Abstract:

An improvement is presented for use in aircraft that have a battery (26), a hydraulically-operated aircraft component (such as a spoiler), and a hydraulic system having a return line (R). The improvement includes a hydraulic transfer cylinder assembly (20) for moving a particular aircraft component (32) in a desired direction during an emergency situation. A preferred assembly (50) includes a housing (52) having a cartridge (62) that is mounted directly to the housing base. The housing includes a first compartment (54), a second compartment (56) fillable with a hydraulic fluid, and a piston (58) separating the first and second compartments. The second compartment has an output port (53) that is in hydraulic communication with the particular aircraft component. The cartridge (62) includes a main firing element. Activation of the cartridge causes the main firing element to produce expanding gas that enters the first compartment (54) and forces the piston to translate, thus forcing hydraulic fluid out the output port (53).