Patent US4622931A successfully refreshed from Google Patents.
US4622931A
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Inlet manifold
Assignee: Ford Global Technologies LLC
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Filing: 1985-06-27
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Granted: 1986-11-18
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Expires: 2005-06-27
Abstract
Abstract An inlet manifold which has long inlet tracts 12 has valves 26,28 at the downstream ends of the tracts to control the air flow close to the cylinder head 24. Sufficient air for engine idle enters the cylinder head through a bypass passage 42. The valves, which are all linked together, are provided by a rotary spool inside a cylindrical bore which is integrally cast with the manifold. A valving portion 30 is associated with each tract.
Inventors
- 👤 Damasius B. Wickramasuriya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:57
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10091; F02M35/10111; F02D; F02D9/00; F02D9/08; F02D9/12; F02D9/16; F02M35/10242; F02M35/10255; F02M35/104; F02M35/112; F02M35/10209; F02M35/10216; F02M35/10222
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
132 words
An inlet manifold for a multicylinder internal combustion engine, the manifold having an inlet tract for each cylinder and a valve at the downstream end of each tract, all the valves being connected to a common actuating member and being adapted to close the tracts, characterized in that the manifold has a cylindrical bore traversing all the tracts at their downstream ends, and a valve member inserted axially in the bore and having a valving portion associated with each tract, the valve member having a plug portion associated with each tract, each plug portion having a bore through it which, in the valve open position, allows flow through the valve without any obstruction of the manifold passage, the axes of the bores being offset from the major diameters of the plug portions.
Claim 2
Dependent Claim
132 words
An inlet manifold for a multicylinder internal combustion engine, the manifold having an inlet tract for each cylinder and a valve at the downstream end of each tract, all the valves being connected to a common actuating member and being adapted to close the tracts, characterized in that the manifold has a cylindrical bore traversing all the tracts at their downstream ends, and a valve member inserted axially in the bore and having a valving portion associated with each tract, the valve member having a plug portion associated with each tract, each plug portion having a bore through it which, in the valve open position, allows flow through the valve without any obstruction of the manifold passage, the axes of the bores being offset from the major diameters of the plug portions.
Claim 3
Dependent Claim
18 words
A manifold as claimed in claim 1, wherein the plug portions are connected by reduced diameter shaft portions.
References Cited (Backward Citations)
GB532408A
Cited
US2645214A
Cited
US2806458A
Cited
GB1184525A
Cited
GB1503086A
Cited
GB2031999A
Cited
JPS5596313A
Cited
JPS55148932A
Cited
FR2456837A1
Cited
US4354459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |