SEALING APPARATUS AND METHOD

A sealing apparatus and method is disclosed, particularly for sealing around an elongate member which passes through a throughbore of a valve device, the apparatus having an upper sealing element and a lower sealing element, each being adapted to change configuration from an open configuration to a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: WOOD, CARL RICHARD
Format: Patent
Sprache:eng
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