US4888516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectrically excitable resonance system
Assignee: Siemens AG
•
Filing: 1988-07-21
•
Granted: 1989-12-19
•
Expires: 2008-07-21
Abstract
Abstract For generating liquid droplets which may pass into the lungs of a person, a resonance system is used which contains a rotation-symmetrical metal body with a disc-shaped base plate, a working plate, a neck connecting the working plate to the base plate as well as a piezoceramic vibrator. The vibrator is coupled to the plane base surface which extends perpendicularly to the symmetry axis of the metal body. The base plate is also provided with a parabolic reflector surface. The center of the working plate is in the vicinity of the reflector focal point, optionally mirrored with respect to the base area of the base plate, of the parabolic reflector surface. In this design, ultrasound waves excited by the vibrator are focused into the region of the working plate, thereby atomizing a liquid which is held by the working plate.
Inventors
- 👤 Johannes Daeges
- 👤 Klaus Van der Linden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:05
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0623; B06; B06B; B06B3/00; B06B3/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A piezoelectrically excitable resonance system for atomizing a liquid, comprising: a metal body with rotational symmetry and capable of vibrating, said body including a disc-shaped base plate having a parabolic surface with a focal point, a working plate disposed at least in the vicinity of said focal point for holding said liquid, and a neck connecting the working plate to the base plate; and a piezoceramic vibrator which is coupled to a plane base surface of the base plate perpendicular to the axis of symmetry, said piezoceramic vibrator operating as a thickness resonance vibrator.
Claim 2
Dependent Claim
94 words
A piezoelectrically excitable resonance system for atomizing a liquid, comprising: a metal body with rotational symmetry and capable of vibrating, said body including a disc-shaped base plate having a parabolic surface with a focal point, a working plate disposed at least in the vicinity of said focal point for holding said liquid, and a neck connecting the working plate to the base plate; and a piezoceramic vibrator which is coupled to a plane base surface of the base plate perpendicular to the axis of symmetry, said piezoceramic vibrator operating as a thickness resonance vibrator.
Claim 3
Dependent Claim
41 words
The resonance system according to claim 1, wherein said base plate has a base surface shaped as a circular ring and makes a transition into a conical neck which passes through the opening of the circular ring beyond the base surface.
Claim 4
Dependent Claim
26 words
The resonance system according to claim 2, wherein said neck is formed as a truncated cone tapered at an acute angle and having a disc-shaped depression.
Claim 5
Dependent Claim
20 words
The resonance system according to claim 2, wherein the conical neck makes a transition to an enlarged disc-shaped working plate.
Claim 6
Dependent Claim
38 words
The resonance system according to claim 1, wherein the disc-shaped base plate makes a transition to the neck supporting the disc-shaped working plate on the side of the parabolic surface in the vicinity of the axis of symmetry.
Claim 7
Dependent Claim
56 words
The resonance system according to claim 5, wherein the disc-shaped working plate has a conical side part and the transition region between the neck and the disc-shaped working plate as well as the inclination of the side part relative to the central part of the disc-shaped working plate are arranged and constructed for multiple ultrasonic reflections.
Claim 8
Dependent Claim
26 words
The resonance system according to claim 6, wherein the side part is provided with a circular notch in the vicinity of the rim of the disc.
Claim 9
Dependent Claim
27 words
The resonance system according to claim 5, wherein the thickness of the disc-shaped base plate is about twice the wavelength of the ultrasound in the base plate.
Claim 10
Dependent Claim
21 words
The resonance according to claim 5, wherein the diameter of the disc-shaped working plate is about three times the ultrasound wavelength.
Claim 11
Dependent Claim
25 words
The resonance system according to claim 5, wherein the diameter of the base area of the base plate is approximately ten times the ultrasound wavelength.
Claim 12
Dependent Claim
20 words
The resonance system according to claim 5, wherein the diameter of the neck is approximately equal to one ultrasound wavelength.
Claim 13
Dependent Claim
21 words
The resonance system according to claim 5, wherein the height of the neck corresponds approximately to one wavelength of the ultrasound.
References Cited (Backward Citations)
DE1425897A1
Cited
US3904896A
Cited
SU434623A1
Cited
DE2557958A1
Cited
EP0019210A2
Cited
US4474326A
Cited
DE3616713A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |