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 05:36
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)
US1063412A
Cited
US1146724A
Cited
FR600022A
Cited
US2121948A
Cited
FR1283179A
Cited
FR1341665A
Cited
JPS5628533A
Cited
JPS56121929A
Cited
US4439136A
Cited
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 |