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:
Sep. 27, 1994
Filed:
Apr. 12, 1993
Michael E Renzelmann, Woodinville, WA (US);
Mark H Smith, Vashon Island, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A folding wing tip (14) on an aircraft (2) carries a lug (16) that moves into alignment with lugs (6, 10) on the inboard wing portion (4) as the wings spread. The lug (16) pivots an inhibitor (28) that is interconnected by linkage to a valve spool (122). The pivoting of the inhibitor (28) causes the spool (122) to shift its position so that a sense port is brought into communication with a return port. Return pressure in the sense port indicates a spread wing condition. When the wing tip (14) is folded, springs move the inhibitor (28) and the valve spool (122) back to their original positions. This communicates the sense port with a pressure port to indicate a folded wing condition. The spool (122) is preferably also biased into its original position by fluid pressure. In addition, the lug (16) has a cam (92) that engages a roller (84) carried by the inhibitor (28) when the wing tip (14) is moved into a folded position. Abutment of the cam (92) and roller (84) pivots the inhibitor (28) back into its original position.