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:
Mar. 26, 1985
Filed:
Sep. 30, 1981
Alankar Gupta, Renton, WA (US);
Robert W Jenny, Bellevue, WA (US);
Frank L Malone, Black Diamond, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A drain structure for facilitating the draining of liquid condensate from inside an aircraft whenever air pressures inside and outside the aircraft are substantially equal. A pressure-sensitive apparatus is provided in conjunction with a drain opening through the aircraft's outer skin so that liquid can pass through the drain opening only while the apparatus is open. The apparatus includes a housing and a valve in the form of a slider movable within the housing to open and close the apparatus in response to the pressure differential between the inside and the outside of the aircraft. The housing defines a liquid passageway between the inside of the aircraft and the drain opening, and the slider closes the apparatus by blocking this liquid passageway whenever there is a substantial pressure differential between the inside and the outside of the aircraft. In opening and closing the apparatus the slider moves through both the liquid passageway and the drain opening so that the drain structure is kept free of debris which might otherwise interfere with operation of the slider or the draining of liquid.