US4561408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorized flow control valve
Assignee: Borg Warner Corp
•
Filing: 1984-01-23
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Granted: 1985-12-31
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Expires: 2004-01-23
Abstract
Abstract The invention teaches the use of a cam-operated valve control means, which cam is moved by an electrical motor in response to an operating signal. Such valve control means finds particular application in an exhaust gas recirculation system or idle speed control for an automobile engine.
Inventors
- 👤 Patrick A. Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/06; F02M3/07; F02M3/075; F02D; F02D41/00; F02D41/0025; F02D41/0047; F02D41/0077; F02M26/00; F02M26/52; F02M26/53; F02M26/54; F02M26/65; F02M26/66; F02M26/67; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
201 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface and a stem bore with a seal means positioned in said stem bore; drive means, including a stepper motor having a drive shaft extending therefrom and operable by said stepper motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber, said discharge port communicating with said discharge chamber, said inlet port communicating with said inlet chamber, said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said discharge chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housing wall; and a bias spring between said keeper plate and housing top surface to urge said valve into contact with said valve seat to seal said separator bore.
Claim 2
Dependent Claim
201 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface and a stem bore with a seal means positioned in said stem bore; drive means, including a stepper motor having a drive shaft extending therefrom and operable by said stepper motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber, said discharge port communicating with said discharge chamber, said inlet port communicating with said inlet chamber, said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said discharge chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housing wall; and a bias spring between said keeper plate and housing top surface to urge said valve into contact with said valve seat to seal said separator bore.
Claim 3
Dependent Claim
33 words
A valve control system for an exhaust gas recirculation system as claimed in claim 1 wherein said valve positioned in said discharge chamber contacts and closes said separator bore in a reference position.
Claim 4
Dependent Claim
202 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface, and a stem bore with a seal means positioned in said stem bore; drive means, including a stepper motor having a drive shaft extending therefrom and operable by said stepper motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber, said discharge port communicating with said discharge chamber, said inlet port communicating with said inlet chamber, said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said inlet chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housing wall; and a bias spring between said keeper plate and housing top surface to urge said valve out of contact with said valve seat to open said separator bore.
Claim 5
Dependent Claim
202 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface, and a stem bore with a seal means positioned in said stem bore; drive means, including a stepper motor having a drive shaft extending therefrom and operable by said stepper motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber, said discharge port communicating with said discharge chamber, said inlet port communicating with said inlet chamber, said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said inlet chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housing wall; and a bias spring between said keeper plate and housing top surface to urge said valve out of contact with said valve seat to open said separator bore.
Claim 6
Dependent Claim
32 words
A valve control for an exhaust gas recirculation system as claimed in claim 3 wherein said valve positioned in said inlet chamber contacts and closes said separator bore in a reference position.
Claim 7
Dependent Claim
203 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface and a stem bore with a seal means positioned in said stem bore; drive means, including a direct current motor having a drive shaft extending therefrom and operable by said direct current motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber; said discharge port communicating with said discharge chamber; said inlet port communicating with said inlet chamber; said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said discharge chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housng wall; and a bias spring between said keeper plate and housing top surface to urge said valve into contact with said valve seat to seal said separator bore.
Claim 8
Dependent Claim
203 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface and a stem bore with a seal means positioned in said stem bore; drive means, including a direct current motor having a drive shaft extending therefrom and operable by said direct current motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber; said discharge port communicating with said discharge chamber; said inlet port communicating with said inlet chamber; said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said discharge chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housng wall; and a bias spring between said keeper plate and housing top surface to urge said valve into contact with said valve seat to seal said separator bore.
Claim 9
Dependent Claim
32 words
A valve control for an exhaust gas recirculation system as claimed in claim 5 wherein said valve positioned in said discharge chamber contacts and closes said separator bore in a reference position.
Claim 10
Dependent Claim
204 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface, and a stem bore with a seal means positioned in said stem bore; drive means, including a direct current motor, having a drive shaft extending therefrom and operable by said direct current motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber; said discharge port communicating with said discharge chamber; said inlet port communicating with said inlet chamber; said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said inlet chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housing wall; and a bias spring between said keeper plate and housing top surface to urge said valve out of contact with said valve seat to open said separator bore.
Claim 11
Dependent Claim
204 words
A valve control system for an exhaust gas recirculation system comprising: a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface, and a stem bore with a seal means positioned in said stem bore; drive means, including a direct current motor, having a drive shaft extending therefrom and operable by said direct current motor; a cam operator connected for operation by said drive shaft; a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber; said discharge port communicating with said discharge chamber; said inlet port communicating with said inlet chamber; said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers; a valve positioned in said inlet chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator; a keeper plate mounted on said stem between said cam operator and said housing wall; and a bias spring between said keeper plate and housing top surface to urge said valve out of contact with said valve seat to open said separator bore.
Claim 12
Dependent Claim
32 words
A valve control for an exhaust gas recirculation system as claimed in claim 7 wherein said valve positioned in said inlet chamber contacts and closes said separator bore in a reference position.
References Cited (Backward Citations)
US1989942A
Cited
GB1183844A
Cited
US3675633A
Cited
US3807375A
Cited
US3839662A
Cited
US4027636A
Cited
US4094285A
Cited
US4064851A
Cited
US4158351A
Cited
US4233946A
Cited
US4333440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |