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:
May. 05, 1992
Filed:
Dec. 20, 1990
Donald L Grande, Des Moines, WA (US);
Harry C Ralph, Kirkland, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A landing gear for an aircraft has a multi-wheeled truck that is swung by a main prop from a stowed position to a lowered position below the aircraft. The truck is pivotably connected to the lower end of the main prop. When the gear is lowered, at least one rear prop extends between the upper end of the main prop and an aft region of the wheel truck. Both the main and rear props are telescoping members. However, the rear prop is releasably lockable to hold a certain fixed length when the aircraft is on the ground, so as to prevent pivoting movement of the wheel truck relative to the main prop. This impedes the ability of the aircraft to tip back when its center of gravity shifts aft during unloading.