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:
Nov. 23, 1993
Filed:
Sep. 09, 1991
Applicant:
Inventor:
Raymond H Horstman, Auburn, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
244209 ; 244130 ;
Abstract
The present invention involves laminar flow control for reducing drag on a body moving through a fluid. A skin is provided through which fluid in the boundary layer is drawn. The skin includes a plurality of perforations. The ratio of the effective area of the perforations to the skin area is spatially variable. The ratio is varied to compensate for expected variations in external pressure such that a substantially uniform suction results in a spatially uniform mass flow rate through the skin. Preferably, the perforations are approximately tapered to avoid inspiration of debris and unwanted outflow.