Title: Water closet tank drain valve

Abstract: A self-contained, recirculating flush liquid, type of water closet for passenger aircraft; wherein, the means for periodically draining the contents of the waste holding tank, comprises an inverted U-shaped tube which is separated at the bend of the U-shape or elbow thereof, into approximately two half-parts. These half-parts are joined by a movable or flexible connection in order that one of the half-parts can be moved relative to the other half-part. One end of the U-shaped tube is rigidly fixed to and projects out from the bottom of the tank; and the other movable half-part has an intake nozzle opening which when it is positioned at the bottom surface of the tank, it is at an operative waste removal position, and when it is moved to a raised position where the intake nozzle opening is at the top of the tank, the removal of waste from the tank is prevented.

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Other info:

Inventors: Carolan, Raymond Jerome (Seattle, WA, US)

Application Number: 818027
Filing Date: 1977-07-22
Publication_date: 1978-09-19
Assignee: The Boeing Company (Seattle, WA)
Primary Class(es): 4/317 4/249, 4/323, 4/372, 4/375, 4/459, 137/577
Other Classes:
US Patent Ref:

1364309	Jan, 1921	Popp	4/48.
2099631	Nov, 1937	Sarra	4/47.
2122909	Jul, 1947	Eganas	4/47.
3454967	Jul, 1969	Corliss	4/77.
3593346	Jul, 1971	Katona	4/10.
3662888	May, 1972	Kemper	4/10.

Other Refs:
Primary Examiner: Artis, Henry K.
Assistant Examiner:
Attorney: Hartmann; H. Gus, Donahue; Bernard A.