US4610426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoceramic valve plate for a low-pressure injection valve and process for the production thereof
Assignee: Schaeffler Engineering GmbH
•
Filing: 1985-07-03
•
Granted: 1986-09-09
•
Expires: 2005-07-03
Abstract
Abstract For a low-pressure injection valve, a piezoceramic valve plate as a flexural resonator, the valve plate having a carrier plate and on one side or on both sides silvered piezoceramic plates held by a binding layer. It is the object of the present invention to provide a flexural resonator which comprises within a large temperature range a proper and reliable connection between the carrier plate and the ceramic plate. The carrier plate consists of a metallic glass, and the binding layer is a soft solder with Zn as main component and an alloy suppressor such as Pb, Cd, and/or Ag.
Inventors
- 👤 Burkhard Brandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:08
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/166; F02M51/00; F02M51/06; F02M51/0603; F02M51/08; H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2047
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
For a low-pressure injection valve, a piezoceramic valve plate as a flexural resonator, the valve plate having a carrier plate and on one side or on both sides silvered piezoceramic plates held by a binding layer, characterized in that the carrier plate consists of a metallic glass and that the binding layer is a soft solder with Zn as main component and an alloy suppressor such as Pb, Cd, and/or Ag.
Claim 2
Dependent Claim
71 words
For a low-pressure injection valve, a piezoceramic valve plate as a flexural resonator, the valve plate having a carrier plate and on one side or on both sides silvered piezoceramic plates held by a binding layer, characterized in that the carrier plate consists of a metallic glass and that the binding layer is a soft solder with Zn as main component and an alloy suppressor such as Pb, Cd, and/or Ag.
Claim 3
Dependent Claim
37 words
A valve plate according to claim 1, characterized in that the soft solder contains 50 to 70% Sn, 0 to 35% Pb, 25% Cd, 0 to 3.5% Ag, 0 to 25% Zn, each in percent by weight.
Claim 4
Dependent Claim
24 words
A valve plate according to claim 1 or claim 2, characterized in that the piezoceramic plate has a central cutout for a valve seat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |