Duct closure

Patent · 31 December 1986

OSTI ID:866428

Vowell, Kennison L ^[1]

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1. Canoga Park, CA

A closure for an inclined duct having an open upper end and defining downwardly extending passageway. The closure includes a cap for sealing engagement with the open upper end of the duct. Associated with the cap are an array of vertically aligned plug members, each of which has a cross-sectional area substantially conforming to the cross-sectional area of the passageway at least adjacent the upper end of the passageway. The plug members are interconnected in a manner to provide for free movement only in the plane in which the duct is inclined. The uppermost plug member is attached to the cap means and the cap means is in turn connected to a hoist means which is located directly over the open end of the duct.

• Research Organization: ROCKWELL INTERNATIONAL CORP
• DOE Contract Number: AC03-79ET37109
• Assignee: Rockwell International Corporation (El Segundo, CA)
• Patent Number(s): US 4707323
• OSTI ID: 866428
• Country of Publication: United States
• Language: English

Related Subjects

/376/138/220/976/
adjacent
aligned
array
associated
attached
cap
closure
conforming
connected
cross-sectional
defining
directly
downwardly
downwardly extending
duct
engagement
extending
free
hoist
inclined
interconnected
located
manner
means
movement
passageway
plane
plug
provide
sealing
sealing engage
sealing engagement
substantially
upper
uppermost
vertically
vertically aligned