Fluent material handling – with receiver or receiver coacting mea – Automatic control of flow cutoff or diversion – Level or overflow responsive
Patent
1977-06-06
1979-02-13
Bell, Jr., Houston S.
Fluent material handling, with receiver or receiver coacting mea
Automatic control of flow cutoff or diversion
Level or overflow responsive
141225, 141392, 1375133, B67C 334, B65B 3106
Patent
active
041390326
ABSTRACT:
In an automatic shut-off nozzle, the vacuum chamber, which has its vacuum increased when flow through the nozzle is to be stopped in response to a predetermined condition such as the tank being filled to a predetermined level, for example, has the reduction in the vacuum therein controlled so that the automatic shut-off mechanism cannot be returned to its latching position by the attendant for a predetermined period of time after having been activated. A check valve allows removal of air from the chamber to increase the vacuum in response to the predetermined condition while preventing flow of air into the chamber. The flow of air into the chamber to reduce the vacuum therein must be through metering means so that a predetermined period of time must elapse until the vacuum in the chamber has been reduced by the air flow through the metering means to enable the shut-off mechanism to be latched.
REFERENCES:
patent: 3907010 (1975-09-01), Burns et al.
Ebbesmeyer Steven R.
Lasater Donald A.
Taylor Charles W.
Bell, Jr. Houston S.
Dover Corporation
Schenk John G.
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