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US 5,496,128 AGranted
Adjustable fastening band for a manhole chimney seal and method of using
AssigneeThe Cretex Companies, Inc.
InventorFrank J. Odill
Life of this patent
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AssigneeThe Cretex Companies, Inc.
InventorFrank J. Odill
Estimating the term…
An internal fastening band for an internal manhold chimney seal is disclosed, as well as a means for expanding the band and a means for removing the band. One end of the band is narrower than the other end so that when overlapped the ends of the band nest into one another to form a continuous expansion band. The first end portion has a plurality of apertures longitudinally spaced along the fastening band, and a plurality of slots spaced between the apertures and an end of the fastening band. The second end portion also has a aperture along a tab for engaging one of the slots to connect the first end portion to the second end portion with the particular slot being selected to adjust the continuous circular fastening band to a desired diameter. A tool is described for engaging an aperture in each end portion to increase the diameter of the circular expansion band and force the resilient sleeve against the inside surface of the manhole. An attachment for this tool to provide for the removal of this band is also disclosed.
A fastening band for forcing an expandable resilient seal against a surface of a manhole, said fastening band having a first end portion and a second end portion which overlap and which when connected together form a continuous hoop with an outer perimeter which substantially continuously engages the expandable resilient seal, the first end portion has a plurality of holes spaced longitudinally along the fastening band, and the second end portion has a tab for engaging one of the plurality of holes to connect the first end portion to the second end portion with the one of the plurality of holes being selected to adjust a perimeter of the fastening band to a desired size.
A sealing system for chimney joints of a manhole, wherein said sealing system comprises:
A tool for removing a manhole seal fastening band which has two overlapping end portions with a tab on one end portion inserted into a hole in another end portion, wherein said tool comprises a body, and a pair of wedge shaped claws spaced apart and extending from said body for siding between the two end portions with the tab received between said claws to extract the tab from the one of the hole.
A manhole sealing method comprising:
Dependencies are inferred from the claim text.