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US 6,266,928 B1Granted
Fuel tank sump containment apparatus
OwnerToby Argandonainventor
Life of this patent
Estimating the term…
Abstract
A sump containment apparatus for a fuel storage tank has a manhole skirt communicating with a sump interior, a bladder seal with a first portion secured in sealing engagement about an opening in the sump, and a second portion disposed about an inner surface of the manhole skirt and urged into sealing engagement with the inner surface by mechanical compression, preferably by an expansion ring. An observation port in a manhole cove is openable for viewing into the sump.
Claims23
Sump containment apparatus for a fuel storage tank wherein a manhole and sump are disposed thereatop, comprising:
- a manhole structure including a skirt extending into general proximity with the sump and communicating with the interior of the sump,
- a resilient bladder seal having first and second spaced-apart portions,
- said first bladder seal portion being in sealing engagement with an upper portion of the sump, and
- said second portion of said bladder seal being sealingly engaged about an inner wall surface of the manhole,
- whereby positive fluid sealing is provided between the bladder seal, the sump, and the interior surface of the manhole wall to prevent entry of water into the sump.
2 more elements
Sump containment apparatus for a fuel storage tank, comprising:
- a manhole having a cover,
- a manhole skirt disposed above and extending into general proximity with a sump,
- a bladder seal having first and second spaced apart portions and a bladder portion therebetween,
- said first portion of the bladder seal being secured in sealing engagement with a sump upper portion about an opening in the sump, and
- said second portion of the bladder seal being spaced from said first portion and mechanically compressed in sealing engagement with an inner surface of the manhole wall,
- whereby positive fluid sealing is provided between the bladder seal, the sump, and the interior surface of the manhole wall to prevent entry of water into the sump.
3 more elements
Dependencies are inferred from the claim text.