US5076314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle flapper mechanism
Assignee: SMC Corp
•
Filing: 1991-01-25
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Granted: 1991-12-31
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Expires: 2011-01-25
Abstract
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.
Inventors
- 👤 Motoshige Ikehata
- 👤 Hiroyuki Mikami
- 👤 Naoto Inayama
- 👤 Katsuhiko Odajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:12
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/004; F16K31/005; F16K31/006; F15; F15C; F15C3/00; F15C3/10; F15C3/14; F16K31/02; H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2041; H10N30/2042; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
A nozzle flapper mechanism comprising: an electrostrictive device; a plate member coupled to said electrostrictive device; a nozzle having an orifice facing the plate member on said electrostrictive device; means for applying a voltage to said electrostrictive device to keep a nozzle back pressure constant or vary the nozzle back pressure; said electrostrictive device comprising a substantially T-shaped shim, a piezoelectric ceramics member disposed on said shim, and a thin-film electrode disposed on said piezoelectric ceramics member; and means for gripping said shim only.
Claim 2
Dependent Claim
84 words
A nozzle flapper mechanism comprising: an electrostrictive device; a plate member coupled to said electrostrictive device; a nozzle having an orifice facing the plate member on said electrostrictive device; means for applying a voltage to said electrostrictive device to keep a nozzle back pressure constant or vary the nozzle back pressure; said electrostrictive device comprising a substantially T-shaped shim, a piezoelectric ceramics member disposed on said shim, and a thin-film electrode disposed on said piezoelectric ceramics member; and means for gripping said shim only.
Claim 3
Dependent Claim
47 words
A nozzle flapper mechanism according to claim 1, wherein said shim includes a region free from said piezoelectric ceramics member and said electrode, said region having a plurality of holes spaced from each other, said shim being fixed in position by screws extending through said holes, respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |