The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 1995
Filed:
Dec. 22, 1993
Sun G Kim, Redmond, WA (US);
Donald K Franklin, Tulsa, OK (US);
Michael P Conner, Danville, VT (US);
The Boeing Company, Seattle, WA (US);
Abstract
A hinge arm (16) has opposite ends (18, 20) pivotably connected to an aircraft door (2) and a door frame (8). First and second sprockets (22, 26) are fixed to the door (2) and frame (8) adjacent to the ends (18, 20). A programming chain (30) extends around the sprockets (22, 26) and the arm (16). A linear motor (36) is mounted on the arm (16) in-line with the chain (30). When pressurized gas is supplied to the motor (36), it moves the chain (30) to open the door (2) and maintain it parallel to its closed position as it moves toward and into its fully open position. The door (2) may be opened manually without moving the motor piston (44) because the motor rod (52) slides freely through an axial opening (46) in the piston (44).