US3903646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame arrestor
Assignee: Outboard Marine Corp
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Filing: 1973-06-08
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Granted: 1975-09-09
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Expires: 1993-06-08
Abstract
Abstract Disclosed herein is a flame arrestor for the air intake of an internal combustion engine having improved resistance to the ingress of moisture into the air intake and including a plurality of arcuate fin elements which have a generally inverted V-shaped cross section and which are stacked in vertically spaced relationship to form an annular assembly, a base having a barrel section adapted to be received by the air intake and an annular ledge extending radially from the barrel section for supporting the fin element assembly, and a cover overlying the fin element assembly and the base. The cover includes an outer portion which extends radially beyond the outer edges of the fin elements and the base to prevent impingement of water draining from the cover onto the fin elements. Moisture collecting on the base ledge is prevented from draining into the air intake by an integral annular raised portion which is located adjacent to the inside edges of the bottommost fin elements to act as a barrier or dam. One or more openings are provided in the outer perimeter of the ledge to afford overboard drainage of moisture from the ledge and the fin elements.
Inventors
- 👤 Raymond F Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:05
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10242; F02M35/10262; A; A62; A62C; A62C4/00; A62C4/02; F02B; F02B77/00; F02B77/08; F02M35/10275; F02M35/1015; F02M35/10196; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/06; Y10S55/00; Y10S55/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A FLAME ARRESTOR FOR AN INTERNAL COMBUSTION ENGINE INCLUDING AN AIR INTAKE, SAID ARRESTOR INCLUDING AN ASSEMBLY OF A PLURALITY OF VERTICALLY SPACED FIN ELEMENTS FORMING AN ANNULAR STACKED ARRAY HAVING A TOP, EACH OF SAID FIN ELEMENTS HAVING AN OUTERMOST EDGE AND AN OUTER PORTION WHICH INCLINES RADIALLY DOWNWARDLY TOWARDS SAID OUTERMOST EDGE, SAID FIN ELEMENT AT THE BOTTOM OF SAID ARRAY INCLUDING AN INNER EDGE, A BASE HAVING A BARREL SECTION ADAPTED TO BE RECEIVEED BY THE ENGINE AIR INTAKE, AN ANNULAR LEDGE EXTENDING RADIALLY OUTWARDLY FROM SAID BARREL SECTION FOR RECEIVING SAID FIN ELEMENT ASSEMBLY, AND A CONTINUOUS, ANNULAR RAISED PORTION WHICH IS INTEGRAL WITH SAID
Claim 2
Dependent Claim
109 words
A FLAME ARRESTOR FOR AN INTERNAL COMBUSTION ENGINE INCLUDING AN AIR INTAKE, SAID ARRESTOR INCLUDING AN ASSEMBLY OF A PLURALITY OF VERTICALLY SPACED FIN ELEMENTS FORMING AN ANNULAR STACKED ARRAY HAVING A TOP, EACH OF SAID FIN ELEMENTS HAVING AN OUTERMOST EDGE AND AN OUTER PORTION WHICH INCLINES RADIALLY DOWNWARDLY TOWARDS SAID OUTERMOST EDGE, SAID FIN ELEMENT AT THE BOTTOM OF SAID ARRAY INCLUDING AN INNER EDGE, A BASE HAVING A BARREL SECTION ADAPTED TO BE RECEIVEED BY THE ENGINE AIR INTAKE, AN ANNULAR LEDGE EXTENDING RADIALLY OUTWARDLY FROM SAID BARREL SECTION FOR RECEIVING SAID FIN ELEMENT ASSEMBLY, AND A CONTINUOUS, ANNULAR RAISED PORTION WHICH IS INTEGRAL WITH SAID
Claim 3
Dependent Claim
18 words
A flame arrestor according to claim 1 wherein said fin elements have a generally inverted V-shaped cross section.
Claim 4
Dependent Claim
158 words
A flame arrestor for an internal combustion engine including an air intake, said arrestor including an assembly of a plurality of vertically spaced fin elements forming an annular stacked array having a top, each of said fin elements having an outermost edge and an outer portion which inclines radially downwardly towards said outermost edge, a base having a barrel section adapted to be received by the engine air intake, an annular ledge extending radially outwardly from said barrel section for receiving said fin element assembly and including an outer perimeter, said base also including an upturned lip extending from said outer perimeter of said ledge, said lip including means defining an opening for affording drainage of moisture from said ledge, and a generally horizontal cover overlying said top of said fin element assembly and terminating in an outer edge portion which extends radially beyond the outermost edges of said fin elements and said outer perimeter of said ledge.
Claim 5
Dependent Claim
158 words
A flame arrestor for an internal combustion engine including an air intake, said arrestor including an assembly of a plurality of vertically spaced fin elements forming an annular stacked array having a top, each of said fin elements having an outermost edge and an outer portion which inclines radially downwardly towards said outermost edge, a base having a barrel section adapted to be received by the engine air intake, an annular ledge extending radially outwardly from said barrel section for receiving said fin element assembly and including an outer perimeter, said base also including an upturned lip extending from said outer perimeter of said ledge, said lip including means defining an opening for affording drainage of moisture from said ledge, and a generally horizontal cover overlying said top of said fin element assembly and terminating in an outer edge portion which extends radially beyond the outermost edges of said fin elements and said outer perimeter of said ledge.
Claim 6
Dependent Claim
18 words
A flame arrestor according to claim 3 wherein said fin elements have a generally inverted V-shaped cross section.
Claim 7
Dependent Claim
25 words
A flame arrestor according to claim 3 wherein said fin element assembly includes a generally vertical notch extending in general alignment with said lip opening.
Claim 8
Dependent Claim
177 words
A flame arrestor for an internal combustion engine including an air intake, said arrestor including an assembly of a plurality of vertically spaced fin elements forming an annular stacked array having a top, said fin elements each being of generally inverted V-shaped cross section and including an inner edge and an outer edge, a base having a barrel section adapted to be received by the engine air intake, and annular ledge extending radially outwardly from said barrel section for receiving said fin element assembly and terminating in an upturned lip, said lip including means defining an opening for affording the drainage of moisture from said ledge, a continuous, annular raised portion on said base located generally adjacent to said inner edge of the bottommost of said fin elements to act as a barrier against moisture draining from said ledge into the engine air intake, and a generally horizontal cover overlying said top of said fin element assembly and terminating in an outer edge portion extending radially beyond said outer edges of said fin elements and said ledge.
Claim 9
Dependent Claim
177 words
A flame arrestor for an internal combustion engine including an air intake, said arrestor including an assembly of a plurality of vertically spaced fin elements forming an annular stacked array having a top, said fin elements each being of generally inverted V-shaped cross section and including an inner edge and an outer edge, a base having a barrel section adapted to be received by the engine air intake, and annular ledge extending radially outwardly from said barrel section for receiving said fin element assembly and terminating in an upturned lip, said lip including means defining an opening for affording the drainage of moisture from said ledge, a continuous, annular raised portion on said base located generally adjacent to said inner edge of the bottommost of said fin elements to act as a barrier against moisture draining from said ledge into the engine air intake, and a generally horizontal cover overlying said top of said fin element assembly and terminating in an outer edge portion extending radially beyond said outer edges of said fin elements and said ledge.
Claim 10
Dependent Claim
25 words
A flame arrestor according to claim 6 wherein said fin element assembly includes a generally vertical notch extending in general alignment with said lip opening.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |