Circular conduit opening closure device
First Claim
Patent Images
1. A device to inhibit entry of debris and other matter into a conduit comprising:
- an outer band, an inner band wherein said inner band disposed interior to said outer band and a cover wherein a perimeter edge of said cover is wrapped around said outer band and is fastened between said outer band and said inner band;
said outer band having two separated ends and said inner band having two separated ends; and
an expansion clamp attached to one of said inner band and said outer band.
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Abstract
The closure device for a circular conduit opening may be used to inhibit entry of debris and other matter into a conduit. The closure device may have an outer band, an inner band and a cover wherein a perimeter edge of the cover may be fastened between the outer band and the inner band. The outer band may have two separated overlapping ends and the inner band having two separated ends. A clamp may be attached to one of the inner band and the outer band.
48 Citations
15 Claims
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1. A device to inhibit entry of debris and other matter into a conduit comprising:
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an outer band, an inner band wherein said inner band disposed interior to said outer band and a cover wherein a perimeter edge of said cover is wrapped around said outer band and is fastened between said outer band and said inner band; said outer band having two separated ends and said inner band having two separated ends; and an expansion clamp attached to one of said inner band and said outer band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device to inhibit entry of debris and other matter into a conduit comprising:
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an elastic outer band, an elastic inner band wherein said inner band disposed interior to said outer band and a flexible cover wherein a perimeter edge of said cover is fastened between said elastic outer band and said elastic inner band; said elastic outer band having two separated ends with a portion of said outer band overlapping adjacent said two separated ends and said elastic inner band having two separated ends; an expansion clamp attached to one of said elastic inner band and said elastic outer band wherein said elastic inner band and said elastic outer band expandable by force of said expansion clamp; and a plurality of anchor bolts are threadably engaged with one of said elastic inner band and said elastic outer band, and said anchor bolts movable through said elastic inner band and said outer band for engagement with a conduit wall. - View Dependent Claims (12, 13, 14, 15)
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Specification