Nozzle flapper mechanism

Details Nozzle flapper mechanism Nozzle flapper mechanism

1991-01-25

1991-12-31

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

25112906, G05D 1620

Patent

active

050763148

ABSTRACT:
A nozzle flapper mechanism includes an electrostrictive device, a plate member coupled to the electrostrictive device, a nozzle having an orifice facing the electrostrictive device or the plate member, and a controller for applying a voltage to the electrostrictive device to keep a nozzle back pressure constant or vary the nozzle back pressure. The electrostrictive device comprises a shim, piezoelectric ceramics members disposed on the shim, and thin-film electrodes disposed on the piezoelectric ceramics members, the electrodes having an area smaller than that of the piezoelectric ceramics members, the piezoelectric ceramics members having one end directly fixed in position on a stationary member.

REFERENCES:
patent: 3063422 (1962-11-01), Gregowski et al.
patent: 4492360 (1985-06-01), Lee, II et al.
patent: 4545561 (1985-10-01), Brown
patent: 4610426 (1986-09-01), Brandner

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