Patent US3158222A successfully refreshed from Google Patents.
US3158222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1962-07-02
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Granted: 1964-11-24
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Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Richmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:30
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1861; F01N13/1838; F01N13/1844; F01N13/1855; F01N13/1888; F01N2260/00; F01N2260/18; F01N2450/00; F01N2450/24; F01N2470/00; F01N2470/10; F01N2530/00; F01N2530/02; F01N2530/04; F01N2530/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A MUFFLER ASSEMBLY COMPRISING A FIRST SHELL AND A SECOND SHELL HAVING MATCHING MARGINAL EDGES WHICH ARE ARRANGED TO ABUT TO FORM A GAS-TIGHT ENCLOSURE HAVING A GAS INLET AND A GAS OUTLET, SAID FIRST SHELL HAVING A PLURALITY OF INTEGRAL RIBS EXTENDING TRANSVERSELY OF SAID FIRST SHELL, SAID SECOND SHELL HAVING A PAIR OF BAFFLES IN CONFRONTING RELATIONSHIP IN CLOSE PROXIMITY TO SAID GAS INLET, SAID BAFFLES HAVING A SPACE THEREBETWEEN FOR PERMITTING THE PASSAGE OF GAS THERETHROUGH, SAID SECOND SHELL ALSO HAVING A LONGITUDINALLY EXTENDING FLOW DIVIDING MEANS REARWARDLY OF THE CONFRONTING BAFFLES IN THE DIRECTION OF GAS FLOW, AND A PLATE CONFINED BETWEEN SAID SHELLS, SAID PLATE HAVING BAFFLE MEANS AND APERTURES THEREIN WHICH COOPERATE WITH THE RIBS, BAFFLES, AND FLOW DIVIDING MEANS ON SAID SHELLS TO DEFINE A PLURALITY OF RESONANT CHAMBERS AND EXPANSION CHAMBERS FOR GASES PASSING BETWEEN SAID INLET AND SAID OUTLET.
Claim 2
Dependent Claim
148 words
A MUFFLER ASSEMBLY COMPRISING A FIRST SHELL AND A SECOND SHELL HAVING MATCHING MARGINAL EDGES WHICH ARE ARRANGED TO ABUT TO FORM A GAS-TIGHT ENCLOSURE HAVING A GAS INLET AND A GAS OUTLET, SAID FIRST SHELL HAVING A PLURALITY OF INTEGRAL RIBS EXTENDING TRANSVERSELY OF SAID FIRST SHELL, SAID SECOND SHELL HAVING A PAIR OF BAFFLES IN CONFRONTING RELATIONSHIP IN CLOSE PROXIMITY TO SAID GAS INLET, SAID BAFFLES HAVING A SPACE THEREBETWEEN FOR PERMITTING THE PASSAGE OF GAS THERETHROUGH, SAID SECOND SHELL ALSO HAVING A LONGITUDINALLY EXTENDING FLOW DIVIDING MEANS REARWARDLY OF THE CONFRONTING BAFFLES IN THE DIRECTION OF GAS FLOW, AND A PLATE CONFINED BETWEEN SAID SHELLS, SAID PLATE HAVING BAFFLE MEANS AND APERTURES THEREIN WHICH COOPERATE WITH THE RIBS, BAFFLES, AND FLOW DIVIDING MEANS ON SAID SHELLS TO DEFINE A PLURALITY OF RESONANT CHAMBERS AND EXPANSION CHAMBERS FOR GASES PASSING BETWEEN SAID INLET AND SAID OUTLET.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |