US5340081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for positively seating a piezoceramic element in a piezoelectric valve during inlet gas injection
Assignee: United States Department of Energy
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Filing: 1993-06-07
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Granted: 1994-08-23
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Expires: 2013-06-07
Abstract
Abstract A piezoelectric valve in a gas delivery system includes a piezoceramic element bonded to a valve seal and disposed over a valve seat, and retained in position by an O-ring and a retainer; an insulating ball normally biased by a preload spring against the piezoceramic element; an inlet gas port positioned such that upon admission of inlet gas into the valve, the piezoceramic element is positively seated. The inlet gas port is located only on the side of the piezoceramic element opposite the seal.
Inventors
- 👤 Kenneth E. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:29
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/04; F16; F16K; F16K31/00; F16K31/004; F16K31/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A piezoelectric valve in a gas delivery system comprising: a piezoceramic element bonded to a valve seal and disposed over a valve seat, and retained in position by an O-ring and a retainer; an insulating ball normally biased by a preload spring against the piezoceramic element; an inlet gas port located only on the side of the piezoceramic element opposite the seal such that upon admission of inlet gas into the valve, the piezoceramic element and seal is positively seated.
Claim 2
Dependent Claim
80 words
A piezoelectric valve in a gas delivery system comprising: a piezoceramic element bonded to a valve seal and disposed over a valve seat, and retained in position by an O-ring and a retainer; an insulating ball normally biased by a preload spring against the piezoceramic element; an inlet gas port located only on the side of the piezoceramic element opposite the seal such that upon admission of inlet gas into the valve, the piezoceramic element and seal is positively seated.
Claim 3
Dependent Claim
88 words
A piezoelectric valve in a gas delivery system comprising: a piezoceramic element bonded to a valve seal and disposed over a valve seat, and retained in position by an O-ring and a retainer; an insulating ball normally biased by a preload spring against the piezoceramic element; and, an inlet gas port located only on the side of the piezoceramic element opposite the seal such that a pressure surge that occurs from the admission of inlet gas into the valve causes the piezoceramic element and seal to positively seat.
Claim 4
Dependent Claim
88 words
A piezoelectric valve in a gas delivery system comprising: a piezoceramic element bonded to a valve seal and disposed over a valve seat, and retained in position by an O-ring and a retainer; an insulating ball normally biased by a preload spring against the piezoceramic element; and, an inlet gas port located only on the side of the piezoceramic element opposite the seal such that a pressure surge that occurs from the admission of inlet gas into the valve causes the piezoceramic element and seal to positively seat.
References Cited (Backward Citations)
US4492360A
Cited
US4756508A
Cited
JPS62141381A
Cited
US4903732A
Cited
FR2642812A1
Cited
US5029610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |