Double sealed valve

Details Double sealed valve Double sealed valve

1997-07-10

1999-05-18

Walton, George L.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

137312, 13761418, 251 635, 251 636, B08B9/02

Patent

active

059041730

ABSTRACT:
A double sealed valve according to the invention includes a valve seat 6 in a communicating passage 3 formed between an upper passage 1 and a lower passage 2. The valve also includes a first vertical valve stem 8 and a second vertical valve stem 10, which is hollow and slidably surround the first stem 8. The first stem 8 has a first valve plug 7 for slidable engagement with an inner peripheral side of the seat 6. The second stem 10 has a second valve plug 9 for compressive engagement with an upper side of the seat 6. The first stem 8 is connected to a valve drive mechanism 28. When the valve opens, the drive 28 lifts the first stem 8, which the second plug 9 moves upward.

REFERENCES:
patent: 4304251 (1981-12-01), Schadel et al.
patent: 4360039 (1982-11-01), Jeppsson
patent: 4373545 (1983-02-01), Knappe
patent: 4552167 (1985-11-01), Brakelmann
patent: 4605035 (1986-08-01), Rasmussen et al.
patent: 4617955 (1986-10-01), Melgaard
patent: 4655253 (1987-04-01), Ourensma
patent: 4757834 (1988-07-01), Mieth
patent: 5575305 (1996-11-01), Mieth
patent: 5645102 (1997-07-01), Brackelmann et al.

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