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Title: Duct closure

Abstract

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.

Inventors:
 [1]
  1. (Canoga Park, CA)
Publication Date:
Research Org.:
ROCKWELL INTERNATIONAL CORP
OSTI Identifier:
866428
Patent Number(s):
US 4707323
Assignee:
Rockwell International Corporation (El Segundo, CA) OSTI
DOE Contract Number:  
AC03-79ET37109
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
duct; closure; inclined; upper; defining; downwardly; extending; passageway; cap; sealing; engagement; associated; array; vertically; aligned; plug; cross-sectional; substantially; conforming; adjacent; interconnected; manner; provide; free; movement; plane; uppermost; attached; means; connected; hoist; located; directly; vertically aligned; downwardly extending; sealing engagement; sealing engage; /376/138/220/976/

Citation Formats

Vowell, Kennison L. Duct closure. United States: N. p., 1987. Web.
Vowell, Kennison L. Duct closure. United States.
Vowell, Kennison L. Thu . "Duct closure". United States. https://www.osti.gov/servlets/purl/866428.
@article{osti_866428,
title = {Duct closure},
author = {Vowell, Kennison L.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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