Overflow preventing valve apparatus

Details Overflow preventing valve apparatus Overflow preventing valve apparatus

1981-09-16

1983-09-20

Schmidt, Frederick R.

Fluent material handling, with receiver or receiver coacting mea

Automatic control of flow cutoff or diversion

Level or overflow responsive

137414, 141229, 222 14, 251 29, 251 32, 251 45, B65B 5714

Patent

active

044050011

ABSTRACT:
An overflow preventing valve apparatus comprises a valve main body provided at a terminal end of a fluid supplying system passage, a main valve fixed to a separating membrane stretched within the valve main body to separate an upper chamber and a lower chamber, when the main valve is displaced upwards and downwards accompanied by deformation of the separating membrane and closing a fluid supplying passage upon moving downwards, a pilot valve for opening and closing the main valve in response to the opening and closing of the pilot valve itself, where the pilot valve is opened by a fluid supply starting operation, a lock mechanism for locking the pilot valve in an open state, a first lock releasing mechanism responsive to the detection of a dangerous fluid level which could lead to an overflow, for releasing the locking operation by the lock mechanism to close the pilot valve, and a second lock releasing mechanism responsive to the closing operation of the main valve at the time when the supply of fluid is stopped, for releasing the locking operation by the lock mechanism to close the pilot valve.

REFERENCES:
patent: 4106536 (1978-08-01), Coquerel

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