US5467962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Actuator for an exhaust gas recirculation valve
Assignee: Motors Liquidation Co
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Filing: 1994-09-09
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Granted: 1995-11-21
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Expires: 2014-09-09
Abstract
Abstract A valve assembly for metering exhaust gas to the intake of an internal combustion engine has an electromagnetic solenoid actuator having a magnetic circuit which includes a stationary pole piece, an armature moveable within said pole piece, and an air gap separating the pole piece and the armature. The air gap is established using a sleeve member constructed of non-magnetic material and having axially extending slots formed therein. The slots are operable to transfer air from the space above the armature to a space below the armature when the armature moves axially, relative to the pole piece.
Inventors
- 👤 Raul A. Bircann
- 👤 Dwight O. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:55
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/65; F02M26/72; F02M26/52; F02M26/53; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A valve assembly for metering exhaust gas to the intake of an internal combustion engine comprising an electromagnetic solenoid actuator having a magnetic circuit comprising a stationary pole piece, an armature moveable within said pole piece, and an air gap separating said pole piece and said armature, said air gap defined by a sleeve member constructed of non-magnetic material and having axially extending slots formed therein and operable to transfer air from a space above said armature to a space below said armature when said armature moves axially, relative to said pole piece.
Claim 2
Dependent Claim
93 words
A valve assembly for metering exhaust gas to the intake of an internal combustion engine comprising an electromagnetic solenoid actuator having a magnetic circuit comprising a stationary pole piece, an armature moveable within said pole piece, and an air gap separating said pole piece and said armature, said air gap defined by a sleeve member constructed of non-magnetic material and having axially extending slots formed therein and operable to transfer air from a space above said armature to a space below said armature when said armature moves axially, relative to said pole piece.
Claim 3
Dependent Claim
121 words
A valve assembly for metering exhaust gas to the intake of an internal combustion engine comprising a base housing having a valve member for metering exhaust flow therethrough and an actuator, associated with said base housing, comprising an electromagnetic solenoid actuator having a magnetic circuit including a stationary cylindrical pole piece, an armature moveable within said cylindrical pole piece, and an air gap disposed between said armature and said pole piece, said air gap defined by a substantially cylindrical sleeve member constructed of non-magnetic material and having axially extending slots formed therein and operable as conduits for air transferred from a space above said armature to a space below said armature when said armature moves axially in said cylindrical pole piece.
Claim 4
Dependent Claim
121 words
A valve assembly for metering exhaust gas to the intake of an internal combustion engine comprising a base housing having a valve member for metering exhaust flow therethrough and an actuator, associated with said base housing, comprising an electromagnetic solenoid actuator having a magnetic circuit including a stationary cylindrical pole piece, an armature moveable within said cylindrical pole piece, and an air gap disposed between said armature and said pole piece, said air gap defined by a substantially cylindrical sleeve member constructed of non-magnetic material and having axially extending slots formed therein and operable as conduits for air transferred from a space above said armature to a space below said armature when said armature moves axially in said cylindrical pole piece.
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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) | 1998-11-20 | 1999-05-22 | 1999-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-20 | 2003-05-22 | 2003-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-20 | 2007-05-22 | 2007-11-21 | $7700.00 | Window Closed / Lapsed |