Orifice device for air flow restriction

Details Orifice device for air flow restriction Orifice device for air flow restriction

1977-01-03

1978-07-04

Miles, Tim R.

Gas and liquid contact apparatus

Fluid distribution

Valved

261DIG18, 261DIG19, 123103E, 1375137, 138 46, F02M 304

Patent

active

040988503

ABSTRACT:
An orifice device communicable with a vacuum source comprises a first and a second orifice means of sintered metal. The first orifice means is usually closed by a flexible one-way check valve which may keep closed when the air flows in one direction and may be released from the first orifice means when the air flows in the other direction. The air flow normally is passed through the second orifice means thereby to be restricted in both directions, whereby the orifice means are effective independently of each other. Another embodiment is disclosed wherein a flexible member is mounted in and restricts flow in one direction through the central portion of a single sintered metal element.

REFERENCES:
patent: 2777464 (1957-01-01), Mosely
patent: 3321173 (1967-05-01), Seger
patent: 3486491 (1969-12-01), White
patent: 3638626 (1972-02-01), Marshall
patent: 3670708 (1972-06-01), Ojala
patent: 3678907 (1972-07-01), Vartanian
patent: 3766946 (1973-10-01), Corarg
patent: 3831567 (1974-08-01), Freismuth et al.
patent: 3857373 (1974-12-01), Martin et al.
patent: 3895615 (1975-07-01), Schubeck
patent: 3920041 (1975-11-01), Gropp

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