Claims
- 1. A cowling surrounding a rotary surface aerator used for aerating water in tanks, said cowling comprising:
- a ring-shaped frame located above the aerator and adapted to rotate therewith;
- a flexible skirt for isolating the atmosphere generated by the aerator from the environment, said skirt surrounding the aerator and attached at an upper open end thereof around the frame, said skirt further having an open lower end, the body of said skirt being unsupported and free of contact with aerator components, allowing it to flare outwardly during aerator rotation; and,
- ballast means attached to a lower edge of said skirt, said ballast means having a mass dependent upon the weight of the skirt for counteracting centrifugal force exerted thereon during rotation to maintain said lower edge at the surface of the water.
- 2. A cowling according to claim 1 wherein the skirt is a single frustoconical member.
- 3. A cowling according to claim 1 wherein the lower edge of the skirt is curved for tangential orientation with the water's surfaces.
Priority Claims (1)
Number |
Date |
Country |
Kind |
90 04464 |
Apr 1990 |
FRX |
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Parent Case Info
This application is a continuation of Ser. No. 07/880,020 filed May 8, 1992 and now abandoned, which was a continuation of Ser. No. 07/672,433 filed Mar. 20, 1991 and now U.S. Pat. No. 5,124,085.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3561738 |
Galeano |
Feb 1971 |
|
4040963 |
Garrott, Jr. |
Aug 1977 |
|
Foreign Referenced Citations (6)
Number |
Date |
Country |
262717 |
Apr 1988 |
EPX |
2123732 |
Sep 1972 |
FRX |
2399272 |
Feb 1981 |
FRX |
507164 |
Jun 1971 |
CHX |
862761 |
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GBX |
Continuations (2)
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Number |
Date |
Country |
Parent |
880020 |
May 1992 |
|
Parent |
672433 |
Mar 1991 |
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