Patent US2167569A successfully refreshed from Google Patents.
Patent US3712415A successfully refreshed from Google Patents.
US3712415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas exhaust silencer
Assignee: Individual
•
Filing: 1971-11-01
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Granted: 1973-01-23
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Expires: 1991-11-01
Abstract
Abstract A silencer having two similar opposed baffles, each frustoconical in shape, and each having its enlarged open end contiguous with the similar end of the other, and with the apex of the first baffle being adjacent the inlet end of the sound absorbing chamber in which the baffles are disposed.
Inventors
- 👤 L Blatt
- 👤 F Wiesenhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N1/00; F01N1/08; F01N1/10; F01N13/16; F01N2530/00; F01N2530/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A silencer comprising a double open end thick sound absorbing small diameter metal cylinder housing; one end of said housing having an inlet connected to a source of exhausted air; two sintered bronze baffles disposed within said housing adjacent said open ends; with said baffles being oppositely arranged truncated cones having their enlarged open ends contiguous; and with one baffle having its apex adjacent said inlet; and with the other baffle having its apex projected through and extending outwardly of the other end of said housing, outletting to atmosphere; and a plate-like permeable third baffle disposed between and across the open ends of the first and second baffles; the housing and first two baffles being of such a thickness to diameter ratio as to be extremely resistant to vibrations, as would be the case if they were of thin sheet material.
Claim 2
Dependent Claim
141 words
A silencer comprising a double open end thick sound absorbing small diameter metal cylinder housing; one end of said housing having an inlet connected to a source of exhausted air; two sintered bronze baffles disposed within said housing adjacent said open ends; with said baffles being oppositely arranged truncated cones having their enlarged open ends contiguous; and with one baffle having its apex adjacent said inlet; and with the other baffle having its apex projected through and extending outwardly of the other end of said housing, outletting to atmosphere; and a plate-like permeable third baffle disposed between and across the open ends of the first and second baffles; the housing and first two baffles being of such a thickness to diameter ratio as to be extremely resistant to vibrations, as would be the case if they were of thin sheet material.
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |