Flow control providing stable fluid flow

Details Flow control providing stable fluid flow Flow control providing stable fluid flow

2006-10-31

2006-10-31

Bastianelli, John (Department: 3751)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S601180, C251S083000, C251S334000

Reexamination Certificate

active

07128089

ABSTRACT:
An electro-mechanical variable fluid flow restrictor includes a support having a passage and a seal surface, a deformable seal that is engageable with the seal surface, and a bias member for exerting an electronically controlled variable bias against the deformable seal. The seal surface includes channels formed in its surface that extend beneath the deformable seal. The bias member can exert a bias sufficient to cause the deformable seal to fill the channels, preventing fluid flow through the channels. When the bias member decreases the bias against the deformable seal, the deformable seal gradually moves out of the channels, allowing fluid flow through the channels, and through the passage in a flow control. The deformable seal does not need to separate from the seal surface to allow fluid flow. Instead, fluid flows through the small, controlled flow areas created when the deformable seal withdraws from the channels.

REFERENCES:
patent: 3945390 (1976-03-01), Huber
patent: 4350176 (1982-09-01), Lace
patent: 5232196 (1993-08-01), Hutchings et al.
patent: 6367766 (2002-04-01), Briant et al.
patent: 6695006 (2004-02-01), Neagoe et al.
patent: 2003/0015243 (2003-01-01), Neagoe et al.

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