Pipes and tubular conduits – With flow regulators and/or baffles – Restrictors
Patent
1975-03-13
1976-12-07
Aegerter, Richard E.
Pipes and tubular conduits
With flow regulators and/or baffles
Restrictors
138 36, 138 42, F15D 114, B05B 126
Patent
active
039956644
ABSTRACT:
A fluid flow control device is disclosed for maintaining a substantially constant volumetric flow rate in either direction independent of the applied pressure above a predetermined pressure level. The device has a generally cylindrical shape, may be symmetrical about a radial plane of symmetry and comprises an elastomeric member disposed between rigid, slotted end plates. The elastomeric member comprises a central disk portion each of whose faces have axially disposed projections including an outer rim structure, a central boss and a series of spaced flow control segments arranged along a circle lying intermediate the rim structure and boss and defining variable area flow passages. The rim structure and flow control segments define an outer circular channel while the flow control segments and boss define an inner circular channel. The inner channels on opposite sides of the elastomeric member are joined by orifices formed in the disk portion of the member. The outer and inner channels, flow passages and orifices define tortuous fluid paths for establishing an adequate pressure drop across the device. During operation, the elastomeric member is compressed and deformed to vary the flow areas of the flow passages in accordance with the applied pressure to maintain a substantially constant volumetric flow rate through the device.
The outer cylindrical surface of the elastomeric member is adapted to sealingly engage the inside wall surface of the conduit within which it is mounted. In accordance with another aspect of the disclosure, the wall of the conduit is provided with an aperture normally sealed by the elastomeric member. Visual indication of the absence or deterioration of the control device is provided by water seeping from the aperture.
REFERENCES:
patent: 1938475 (1933-12-01), Alexander
patent: 1962168 (1934-06-01), Andrus
patent: 2236084 (1941-03-01), Brown
patent: 2289905 (1942-07-01), Dasher
patent: 2813541 (1957-11-01), Beller
patent: 3130917 (1964-04-01), Aghides
patent: 3882892 (1975-05-01), Menzel
Aegerter Richard E.
Bryant III James E.
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