Stream throttle

Details Stream throttle Stream throttle

1978-09-11

1980-10-21

Haroian, Harry N.

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

222564, 366178, D03D 3920

Patent

active

042288223

ABSTRACT:
The stream throttle includes a movable closure member having an inclined upstream surface and a parabolic downstream surface, an orifice which is throttled by the downstream surface, and an inclined entry surface extending upstream from the orifice in spaced relation to the downstream surface. The entry and downstream surfaces provide a flow control zone which terminates adjacent the orifice. These surfaces, together with the upstream surface, maintain material flow toward and through the control zone uniform, with minimum velocity gradients. The parabolic downstream surface outline causes orifice area and hence flow capacity to vary on a linear basis during movement of the closure member with respect to the orifice. In another disclosed embodiment, the upstream surface is formed by a stationary diverter member within which the closure member is insertable for stop-start flow control. The stream throttle may be used to provide a mass flow variable orifice for linear volumetric control of particulate material flow rates.

REFERENCES:
patent: 713099 (1902-11-01), Hoepner
patent: 1224822 (1917-05-01), Williams
patent: 1241680 (1917-10-01), Thalman
patent: 2588555 (1952-03-01), Molloy
patent: 2652175 (1953-09-01), Davis
patent: 3098637 (1963-07-01), Baustian
patent: 3204832 (1965-09-01), Barber
patent: 3347534 (1967-10-01), Dawson
patent: 3589560 (1971-06-01), Wilcox

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