US4264837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic atomizer with automatic control circuit
Assignee: Individual
•
Filing: 1979-03-30
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Granted: 1981-04-28
•
Expires: 1999-03-30
Abstract
Abstract A method and a device for energizing piezo-electric ultra-sound transducers, wherein rectangular pulses of calibrated duration generate in an oscillation circuit of the transducer damped waves with a frequency equal to the natural frequency of the transducer and modulated at the recurrence frequency of the rectangular pulses.
Inventors
- 👤 Paul Gaboriaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:30
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0253; B06B2201/00; B06B2201/50; B06B2201/55; B06B2201/70; B06B2201/77
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A method of energizing an ultrasonic atomizer for converting liquids to aerosols, said atomizer including a piezoelectric ultrasonic transducer having at least one passageway adapted for the passage of a liquid to be converted into an aerosol, said method comprising the step of exciting the ultrasonic transducer to vibrate at its resonant frequency by applying thereto percussion-like pulses of high energy having a recurrence frequency which is a sub-multiple of said resonant frequency.
Claim 2
Independent Claim
73 words
A method of energizing an ultrasonic atomizer for converting liquids to aerosols, said atomizer including a piezoelectric ultrasonic transducer having at least one passageway adapted for the passage of a liquid to be converted into an aerosol, said method comprising the step of exciting the ultrasonic transducer to vibrate at its resonant frequency by applying thereto percussion-like pulses of high energy having a recurrence frequency which is a sub-multiple of said resonant frequency.
Claim 3
Dependent Claim
147 words
An ultrasonic atomizer for converting liquids to an aerosol, said atomizer having an electrical oscillating circuit and a piezoelectric ultrasonic transducer having at least one passageway for the passage of a liquid to be atomized, said transducer being connected in said oscillating circuit and adapted to vibrate at its ultrasonic resonant frequency, said atomizer comprising a square wave pulse generator coupled to said oscillating circuit for producing high amplitude, percussion-like rectangular pulses of calibrated duration having a recurrence frequency which is a sub-multiple of the resonant frequency of said transducer thereby producing a vibration of said transducer which is amplitude modulated by said percussion-like pulses; and a feedback circuit coupled between said oscillating circuit and said pulse generator, said feedback circuit including a frequency divider having a frequency dividing ratio corresponding to the ratio of the frequency of said pulses and the frequency of said oscillating circuit.
Claim 4
Dependent Claim
147 words
An ultrasonic atomizer for converting liquids to an aerosol, said atomizer having an electrical oscillating circuit and a piezoelectric ultrasonic transducer having at least one passageway for the passage of a liquid to be atomized, said transducer being connected in said oscillating circuit and adapted to vibrate at its ultrasonic resonant frequency, said atomizer comprising a square wave pulse generator coupled to said oscillating circuit for producing high amplitude, percussion-like rectangular pulses of calibrated duration having a recurrence frequency which is a sub-multiple of the resonant frequency of said transducer thereby producing a vibration of said transducer which is amplitude modulated by said percussion-like pulses; and a feedback circuit coupled between said oscillating circuit and said pulse generator, said feedback circuit including a frequency divider having a frequency dividing ratio corresponding to the ratio of the frequency of said pulses and the frequency of said oscillating circuit.
Claim 5
Dependent Claim
96 words
An ultrasonic atomizer as claimed in claim 2, wherein said pulse generator comprises a unijunction transistor producing output pulses, and further comprising a pulse-stretcher type transistor producing output signals, the output pulses of said unijunction transistor being applied to said pulse-stretcher type transistor, a connecting transformer having a primary winding coupled to said pulse-stretcher type transistor and receiving the output signals thereof and separate secondary windings, and power transistors each having a base-emitter circuit connected to a corresponding one of said secondary windings, said power transistors being connected in series and coupled to said feedback circuit.
Claim 6
Dependent Claim
24 words
An ultrasonic atomizer as claimed in claim 2, wherein said pulse generator comprises a multivibrator generating rectangular pulses of calibrated duration and desired frequency.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |