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:
Feb. 10, 1987
Filed:
Sep. 30, 1983
Applicant:
Inventor:
Winfried M Feifel, Seattle, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
244 / ; 244123 ;
Abstract
An airfoil member having an upper surface contoured to create lift. The lower airfoil surface has a lower forward surface portion which, in a rearward direction, curves concavely into an expanded convexly curved lower surface belly portion. This enables a primary load carrying member (e.g. a spar) to be located in the belly section and have a relatively greater depth, without unnecesary sacrifice of aerodynamic performance. In another embodiment, both the upper and lower surfaces of the airfoil are contoured with the expanded belly portion.