Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1984-03-30
1985-11-19
Cohan, Alan
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137557, 13751629, 251 635, 251214, 277117, 277190, F16K 3700, F16K 31163, F16J 912
Patent
active
045535647
ABSTRACT:
A valve comprising a housing having an open-ended portion of circular internal cross-section, an inlet port and an outlet port, the ports being interconnected by a flow space. An obturator is located within the flow space and attached to a movable head such that fluid flow through the valve may be regulated by the obturator by movement of the head. The head retains a seal which bears upon the inner surface of the portion of the housing so as to resist fluid flow past the head. Preferred features include the provision of biasing means which maintain the seal in a state of compression and a seal which has the form of a hollow open-ended cylinder in which the hollow is frusto conical in shape. A bellows connecting the head to the housing and/or a seal provided on the head and bearing against an external cover are especially beneficial since these provide secondary seals against leakage from the flow space. Other advantageous features include the provision of a leak detector, a valve which can be readily dismantled and a specialized form of obturator.
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Cohan Alan
Rivell John A.
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