Patent ID: 6357238
Filing Date: 2002-03-19
Classification: F17C

Abstract:
A withdrawal device for use with a cryogenic tank having a neck, said neck forming an opening having an interior surface into an interior of the tank, said withdrawal device comprising:a housing, said housing having a flange adapted to overlie the neck of the cryogenic tank, an extraction tube having a first portion and a second portion, said first portion extending through said flange so that, with said flange overlying said neck, said first portion of said extraction tube extends into the interior of the tank, and said second portion extending laterally outwardly from said housing exteriorly of the tank, a valve fluidly connected in series with said second portion of said extraction tube, an axially compressible resilient annular seal adapted for insertion into the neck opening, means for mounting said seal to said housing so that one end of said seal abuts against said flange, said mounting means comprising a seal support which overlies the other end of said seal, an elongated rod having one end secured to said seal support, said rod extending through said flange and said housing so that a second end of said rod is positioned above said housing, said second end having a threaded portion, and a lever having threads which cooperate with said threaded portion of said rod threadably engaged with said rod threaded portion, wherein, with said flange positioned in abutment with said tank neck and said seal positioned in said neck opening, rotation of said rod axially compresses said seal so that said seal expands radially outwardly and sealingly engages the interior surface of said neck opening, said lever having a wall portion which limits axial travel of said rod.