Railroad tank car manway nozzle assembly gasket
AssigneeMPRC Products LLC
InventorRobert Ridgway
Life of this patent
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Abstract
A gasket placed on a railroad tank car manway nozzle to extend the gasket's sealing integrity, durability and life. The gasket comprises an external gasket extension, a sealing surface contact portion, an internal gasket extension and a plurality of tabs on the external gasket extension. The sealing surface contact portion includes an enlarged mass portion which gets flattened under compression and extends linearly to provide an additional sealing force along the interior wall of the manway nozzle. The internal gasket extension includes a ring portion which serves as an internal splash guard. In use, the existing manway cover plate assembly is unbolted, the existing nozzle gasket removed and replaced by a new gasket as disclosed herein, and then the cover plate is bolted and torqued down to the nozzle.
Claims15
A gasket for sealing around a railroad tank car manway nozzle having an exterior portion, an end surface, and an interior portion, the gasket comprising:
- a first portion defining an external gasket extension for overlapping an external portion of the manway nozzle;
- a second portion defining a sealing surface contact portion for overlapping an end surface of the manway nozzle;
- and
- a third portion defining an internal gasket extension for overlapping an internal portion of the manway nozzle;
- wherein the third portion includes a ring portion extending at an angle from the internal gasket extension.
A railroad tank car manway nozzle assembly gasket for sealing between a manway nozzle having an exterior portion, an end surface, and an interior portion, and a manway cover plate of a railroad tank car, the gasket comprising:
- an external gasket extension extending downward along an exterior wall of the manway nozzle;
- an internal gasket extension extending downward along an interior wall of the manway nozzle, wherein the internal gasket extension includes a ring portion extending at an angle from the internal gasket extension;
- and
- a sealing surface contact portion between the external gasket extension and the internal gasket extension, and extending across a top edge of the manway nozzle.
A method of sealing between a manway nozzle having an exterior portion, an end surface, and an interior portion, and manway cover plate of a railroad tank car, comprising the steps of:
- unbolting the manway cover plate;
- removing an existing nozzle gasket;
- replacing the existing nozzle gasket with a new gasket having an external gasket extension, a sealing surface contact portion, an internal gasket extension and an angled ring portion on the internal gasket extension to form an internal splash guard along an interior wall of the manway nozzle;
- and
- bolting and torqueing down the cover plate to the nozzle.
Dependencies are inferred from the claim text.