Claims
- 1. A choke comprising:a housing having at least one port; a first sleeve in proximity with said housing; a second sleeve in proximity with said housing; and a drive system capable of variably moving at least one of said first sleeve and said second sleeve relative to one of said housing, said first sleeve and second sleeve to fully open said port, fully close said port and to render said port in at least one condition between fully open and fully closed.
- 2. A choke as claimed in claim 1 wherein said first sleeve is disposed on one of an inside diameter on an outside diameter of said housing and said second sleeve is disposed on an opposite of said inside diameter or said outside diameter of said housing.
- 3. A choke as claimed in claim 1 wherein said first sleeve and said second sleeve are fixedly connected to one another.
- 4. A choke as claimed in claim 1 at least one of said first and second sleeves is disposed at least partially within said housing.
- 5. A choke as claimed in claim 1 wherein said drive system effectively prevents said at least one of said first sleeve and said second sleeve from moving when said drive system is at rest.
- 6. A choke as claimed in claim 1 wherein at least one of said first sleeve and said second sleeve is disposed radially outwardly of said housing.
- 7. A choke as claimed in claim 1 wherein said drive system includes at least one driver and two gear trains, a first gear train connected to said first sleeve and a second gear train connected to said second sleeve.
- 8. A choke as claimed in claim 7 wherein said drive system further includes a driver which is clutchable between said first gear train and said second gear train.
Parent Case Info
This is a continuation of U.S. Ser. No. 09/706,526, filed Nov. 3, 2000 which is a divisional of U.S. Ser. No. 09/175,979, filed Oct. 20, 1998, now U.S. Pat. No. 6,260,616 which is a divisional of Ser. No. 08/831,165, filed Apr. 1, 1997, now U.S. Pat. No. 5,906,238, which claims the benefit of an earlier filing date from U.S. Provisional Application Nos. 60/014,518 Apr. 1, 1996 and 60/014,644 Apr. 1, 1996.
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Provisional Applications (2)
|
Number |
Date |
Country |
|
60/014518 |
Apr 1996 |
US |
|
60/014644 |
Apr 1996 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/706526 |
Nov 2000 |
US |
Child |
09/941291 |
|
US |