Valves and valve actuation – Rotary valves – Ball valve
Patent
1978-01-25
1979-12-18
O'Dea, William F.
Valves and valve actuation
Rotary valves
Ball valve
49277, 49357, 98 41R, 98106, 98DIG10, 251251, 251319, F24F 1318, F24F 700
Patent
active
041788419
ABSTRACT:
Air vent consisting of a fixed, gridlike apertured front panel and a stop plate disposed behind it, which plate is movable by a control mechanism in the direction of its plane and to the plane of the front panel and which plate in a position resting against the back of the front panel closes the grid apertures, but which in a separated position opens the grid apertures of the front panel for the passage of air.
REFERENCES:
patent: 1704571 (1929-03-01), Linz
Frank Gerhard
Kucharczyk Eckhard
Blodgett Gerry A.
Blodgett Norman S.
Joyce Harold
O'Dea William F.
Siegenia-Frank AG.
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