Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing
Patent
1985-01-09
1987-04-21
Walton, George L.
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Cleaning or steam sterilizing
110203, 110204, 110207, 110212, 13724622, 422173, 422175, 422177, F16K 1226, F23G 706, F01N 310, F01N 326
Patent
active
046588531
ABSTRACT:
A butterfly-type step subassembly includes a substantially planar valve disc member having a peripheral groove formed in opposite surfaces thereof. Projecting inwardly from the internal walls of the subassembly housing are two non-coplanar, generally semicircular valve seat members having passageway(s) in them communicating outside the housing with a source of purified gas(es). The passageways terminate interiorly in apertures in respective recesses in the seat members positioned to be brought into communication with said grooves when said valve disc member is in substantial contact with said seat members. Means are provided to supply said purified gas(es) to said passageways in response to the movement of said planar disc member to the nominally closed position so that said gas(es) flow into the contact region between the disc and seat members under sufficient pressure to prevent said effluent from flowing through said valve when nominally closed.
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patent: 4248841 (1981-02-01), Benedick
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patent: 4252999 (1981-02-01), LoBue
patent: 4335738 (1982-06-01), Nassir
patent: 4380246 (1983-04-01), Casale
patent: 4383546 (1983-05-01), Walters, Jr.
Regenerative Environmental Equipment Co. Inc.
Walton George L.
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