US4557227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust port bridge relief hole
Assignee: Outboard Marine Corp
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Filing: 1984-05-10
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Granted: 1985-12-10
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Expires: 2004-05-10
Abstract
Abstract An internal combustion engine cylinder liner adapted to have a piston move reciprocally therewithin, the cylinder liner including an exhaust port, an exhaust port bridge extending across the exhaust port, and a relief hole in the cylinder liner positioned at one end of the exhaust port bridge for allowing the exhaust port bridge to expand in a direction other than toward the path of piston movement.
Inventors
- 👤 Robert W. Woodard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:04
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/18; F02F1/22; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
An internal combustion engine including a cylinder which has a liner and which is adapted to receive a piston for reciprocal movement within said cylinder liner, said cylinder liner including an exhaust port, an exhaust port bridge extending across said exhaust port, and means for allowing said exhaust port bridge to expand in a direction other than toward the path of piston movement, said means including a relief hole extending only through said cylinder liner near said exhaust port bridge.
Claim 2
Dependent Claim
80 words
An internal combustion engine including a cylinder which has a liner and which is adapted to receive a piston for reciprocal movement within said cylinder liner, said cylinder liner including an exhaust port, an exhaust port bridge extending across said exhaust port, and means for allowing said exhaust port bridge to expand in a direction other than toward the path of piston movement, said means including a relief hole extending only through said cylinder liner near said exhaust port bridge.
Claim 3
Dependent Claim
37 words
An internal combustion engine cylinder as set forth in claim 1 wherein the piston includes a piston ring, and wherein said relief hole is positioned outside of the range of piston ring movement within said cylinder liner.
Claim 4
Dependent Claim
30 words
An internal combustion engine cylinder as set forth in claim 2 wherein said exhaust port bridge extends vertically, and wherein said relief hole is positioned below said exhaust port bridge.
Claim 5
Dependent Claim
29 words
An internal combustion engine cylinder as set forth in claim 3 wherein said relief hole is positioned below the lowest point of piston ring movement within said cylinder liner.
Claim 6
Dependent Claim
73 words
A cylinder liner for an internal combustion engine, said cylinder liner being adapted to receive therein a reciprocally moveable piston, said cylinder liner including an exhaust port, an exhaust port bridge extending across said exhaust port, and means for allowing said exhaust port bridge to expand in a direction other than toward the path of piston movement, said means including a relief hole extending through said cylinder liner near said exhaust port bridge.
Claim 7
Dependent Claim
73 words
A cylinder liner for an internal combustion engine, said cylinder liner being adapted to receive therein a reciprocally moveable piston, said cylinder liner including an exhaust port, an exhaust port bridge extending across said exhaust port, and means for allowing said exhaust port bridge to expand in a direction other than toward the path of piston movement, said means including a relief hole extending through said cylinder liner near said exhaust port bridge.
Claim 8
Dependent Claim
35 words
A cylinder liner as set forth in claim 5 wherein the piston includes a piston ring, and wherein said relief hole is positioned outside of the range of piston ring movement within said cylinder liner.
Claim 9
Dependent Claim
28 words
A cylinder liner as set forth in claim 6 wherein said exhaust port bridge extends vertically, and wherein said relief hole is positioned below said exhaust port bridge.
Claim 10
Dependent Claim
27 words
A cylinder liner as set forth in claim 7 wherein said relief hole is positioned below the lowest point of piston ring movement within said cylinder liner.
Claim 11
Dependent Claim
83 words
An internal combustion engine cylinder adapted to receive a piston including a piston ring for reciprocal movement therewithin, said cylinder including an exhaust port, an exhaust port bridge extending across said exhaust port, and means for allowing said exhaust port bridge to expand in a direction other than toward the path of piston movement, said means including a relief hole in said cylinder positioned near said exhaust port bridge at a location outside of the range of piston ring movement within said cylinder.
Claim 12
Dependent Claim
83 words
An internal combustion engine cylinder adapted to receive a piston including a piston ring for reciprocal movement therewithin, said cylinder including an exhaust port, an exhaust port bridge extending across said exhaust port, and means for allowing said exhaust port bridge to expand in a direction other than toward the path of piston movement, said means including a relief hole in said cylinder positioned near said exhaust port bridge at a location outside of the range of piston ring movement within said cylinder.
Claim 13
Dependent Claim
31 words
An internal combustion engine cylinder as set forth in claim 9 wherein said exhaust port bridge extends vertically, and wherein said relief hole is positioned directly below said exhaust port bridge.
Claim 14
Dependent Claim
28 words
An internal combustion engine cylinder as set forth in claim 10 wherein said relief hole is positioned below the lowest point of piston ring movement within said cylinder.
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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |