Patent US5417566A successfully refreshed from Google Patents.
US5417566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing burning resonance noise and a burner plate
Assignee: Rinnai Corp
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Filing: 1993-11-22
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Granted: 1995-05-23
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Expires: 2013-11-22
Abstract
Abstract In a burner plate having a multitude of fire holes each piercing through its thickness so as to effect a primary burning thereon with a high heat capacity, it is adapted to continuously differentiate a time period required for an air-fuel mixture gas to pass through the fire holes of the burner plate from a central portion toward an outer periphery of the burner plate.
Inventors
- 👤 Hideaki Ishikawa
- 👤 Hideyuki Jinno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:48
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/58; F23D2203/00; F23D2203/10; F23D2203/102; F23D2210/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A burner plate adapted to be disposed in a burner chamber defining an acoustic system having a characteristic frequency, said burner plate comprising: a multitude of first fire holes each extending through a thickness of the burner plate so as to effect a primary burning thereon with a high heat capacity; means for preventing resonance noise induced when a phase of a resonant burning heat frequency becomes superposed with a phase of said acoustic system characteristic frequency, said preventing means comprising a countersink provided on an upper end of the fire holes to increase their diameter, a depth of the countersink being progressively increased or reduced from a central portion toward an outer periphery of the burner plate.
Claim 2
Dependent Claim
118 words
A burner plate adapted to be disposed in a burner chamber defining an acoustic system having a characteristic frequency, said burner plate comprising: a multitude of first fire holes each extending through a thickness of the burner plate so as to effect a primary burning thereon with a high heat capacity; means for preventing resonance noise induced when a phase of a resonant burning heat frequency becomes superposed with a phase of said acoustic system characteristic frequency, said preventing means comprising a countersink provided on an upper end of the fire holes to increase their diameter, a depth of the countersink being progressively increased or reduced from a central portion toward an outer periphery of the burner plate.
Claim 3
Dependent Claim
22 words
A burner plate as recited in claim 1, in which a plurality of small second fire holes are provided around the countersink.
Claim 4
Dependent Claim
122 words
A burner plate adapted to be disposed in a burner chamber defining an acoustic system having a characteristic frequency, said burner plate comprising: a multitude of first fire holes each extending through a thickness of the burner plate so as to effect a primary burning thereon with a high heat capacity; means for preventing resonance noise induced when a phase of a resonant burning heat frequency becomes superposed with a phase of said acoustic system characteristic frequency, said preventing means comprising a countersink of substantial uniform depth provided on an upper end of the fire holes to increase their diameter; said burner plate varying in thickness from its center outwardly and a plurality of small second fire holes provided around the countersinks.
Claim 5
Dependent Claim
122 words
A burner plate adapted to be disposed in a burner chamber defining an acoustic system having a characteristic frequency, said burner plate comprising: a multitude of first fire holes each extending through a thickness of the burner plate so as to effect a primary burning thereon with a high heat capacity; means for preventing resonance noise induced when a phase of a resonant burning heat frequency becomes superposed with a phase of said acoustic system characteristic frequency, said preventing means comprising a countersink of substantial uniform depth provided on an upper end of the fire holes to increase their diameter; said burner plate varying in thickness from its center outwardly and a plurality of small second fire holes provided around the countersinks.
Claim 6
Dependent Claim
18 words
A burner plate as recited in claim 1 wherein the burner varies in thickness from its center outwardly.
References Cited (Backward Citations)
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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) | 1998-05-22 | 1998-11-21 | 1999-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-22 | 2002-11-21 | 2003-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-22 | 2006-11-21 | 2007-05-23 | $7700.00 | Window Closed / Lapsed |