US3857688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead filter
Assignee: PPG Industries Inc
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Filing: 1974-03-27
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Granted: 1974-12-31
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Expires: 1994-03-27
Abstract
Abstract Filter units for an automotive exhaust gas system are shown involving a cylindrical housing containing fiber glass filter paper elements. Means to pass gas through the filter paper and out of the unit are shown. The paper units are sealed to insure that all gases entering the filter cleaner are passed through the paper.
Inventors
- 👤 J Wisnewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:52
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0012; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D46/24; B01D46/2403; B01D46/2411; B01D46/52; B01D46/521; B01D46/56; B01D46/58; B01D46/60; B01D50/00; B01D50/20; F; F01; F01N; F01N13/00; F01N13/009; F01N13/011; F01N3/00; F01N3/02; F01N3/021; F01N3/0211; F01N3/0217; F01N3/022; F01N3/0226; F01N3/033; F01N3/037; B01D2273/00; B01D2273/20; B01D2279/00; B01D2279/30; F01N2240/00; F01N2240/20; F01N2250/00; F01N2250/08; F01N2330/00; F01N2330/10; F01N2330/101; F01N2330/102; F01N2370/00; F01N2370/22; F01N2450/00; F01N2450/30; F01N2470/00; F01N2470/14; F01N2470/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30; Y10S55/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
195 words
A FIBER GLAS FIBER COMPRISING : A GAS IMPERMEABLE CYLINDRICAL HOUSING, A FIRST END PLATE MOUNTED WITHIN SAID HOUSING AND SPACED FROM THE INNER SURFACE THEREOF ACTING AS A BAFFLE AT ONE END THEREOF, A SECOND END PLATE MOUNTED IN CLOSING RELATIONSHIP TO THE OPPOSITE END OF SAID HOUSING, A CENTRALLY DISPOSED, APRETURED, HOLLOW CYLINDRICAL SUPPORT MEMBER TRAVERSING THE SUBTANTIAL LENGHT OF SAID HOUSING , EXTENDING TO THE EXTERIOR OF SAID HOUSING THROUGH SAID SECOND END PLATE, AND BEING SUPPORTED BY SAID FIRST AND SECOND END PLATES, A FILTRATION ZONE, HAVING THEREIN GLASS PAPER, SAID GLASS FIBER PAPER BEING MOUNTED CONCENTRICALLY WITHIN AND SPACED FROM THE INNER SURFACE OF SAID HOUSING ON SAID APERTURED SUPPORT MEMBER, SEALING END CAPS ON SAID FILTER PAPER, MEANS FOR SEALING SAID GAS FIBER PAPER, AND SAID FIRST AND SECOND END PLATES INTO A UNITARY STRUCTURE WHICH CAUSE GASES INTRODUCED INTO SAID FILTER TO PASS THROUGH SAID GLASS FIBER PAPER, THE INTERIOR OF SAID HOUSING AND THE EXTERIOR OF SAID GLASS FIBER PAPER PROVIDING A GAS SPACE, MEANS FOR INTRODUCING GASES INTO SAID HOUSING AND SAID GAS SPACE, AND MEANS FOR DISCHARGING GASES FROM SAID HOUSING THROUGH SAID SUPPORT MEMBER.
Claim 2
Dependent Claim
195 words
A FIBER GLAS FIBER COMPRISING : A GAS IMPERMEABLE CYLINDRICAL HOUSING, A FIRST END PLATE MOUNTED WITHIN SAID HOUSING AND SPACED FROM THE INNER SURFACE THEREOF ACTING AS A BAFFLE AT ONE END THEREOF, A SECOND END PLATE MOUNTED IN CLOSING RELATIONSHIP TO THE OPPOSITE END OF SAID HOUSING, A CENTRALLY DISPOSED, APRETURED, HOLLOW CYLINDRICAL SUPPORT MEMBER TRAVERSING THE SUBTANTIAL LENGHT OF SAID HOUSING , EXTENDING TO THE EXTERIOR OF SAID HOUSING THROUGH SAID SECOND END PLATE, AND BEING SUPPORTED BY SAID FIRST AND SECOND END PLATES, A FILTRATION ZONE, HAVING THEREIN GLASS PAPER, SAID GLASS FIBER PAPER BEING MOUNTED CONCENTRICALLY WITHIN AND SPACED FROM THE INNER SURFACE OF SAID HOUSING ON SAID APERTURED SUPPORT MEMBER, SEALING END CAPS ON SAID FILTER PAPER, MEANS FOR SEALING SAID GAS FIBER PAPER, AND SAID FIRST AND SECOND END PLATES INTO A UNITARY STRUCTURE WHICH CAUSE GASES INTRODUCED INTO SAID FILTER TO PASS THROUGH SAID GLASS FIBER PAPER, THE INTERIOR OF SAID HOUSING AND THE EXTERIOR OF SAID GLASS FIBER PAPER PROVIDING A GAS SPACE, MEANS FOR INTRODUCING GASES INTO SAID HOUSING AND SAID GAS SPACE, AND MEANS FOR DISCHARGING GASES FROM SAID HOUSING THROUGH SAID SUPPORT MEMBER.
Claim 3
Dependent Claim
27 words
The fiber glass filter of claim 1 wherein said filtration zone further comprises a plurality of fiber glass filter paper elements mounted on said apertured support members.
Claim 4
Dependent Claim
44 words
The fiber glass filter of claim 2 wherein said means for sealing comprises glass fiber paper gaskets contacting the opposing end caps of each of said filter elements and contacting the surface of each of said end plates and the end caps proximate thereto.
Claim 5
Dependent Claim
47 words
The fiber glass filter of claim 2 wherein said means for sealing comprises weld joints permanently affixing, in a gas impermeable manner, the opposing end caps of each of said filter elements and the surface of each of said end plates and the end caps proximate thereto.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |