Patent US4230467A successfully refreshed from Google Patents.
US4230467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing foam
Assignee: TII Corp
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Filing: 1978-09-18
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Granted: 1980-10-28
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Expires: 1998-09-18
Abstract
Abstract A foam removal apparatus for a vessel which contains a liquid as well as foam bubbles has a cover inclined with respect to the horizontal, a screen, and a trough, the trough being located beneath at least a portion of the screen for removing foam pushed through said screen. The apparatus can be used in conjunction with any shaped vessel and requires no energy for foam removal. Either a rising liquid level in the vessel or a continuous generation of foam forces the foam against the inclined cover and through the screen which causes a substantial amount of foam bubbles to collapse and fall as liquid into the trough.
Inventors
- 👤 Hubert W. Buchwald
- 👤 Peter C. Houle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:10
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; Y; Y10; Y10S; Y10S55/00; Y10S55/25
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
78 words
A foam removal apparatus for a vessel containing liquid and foam bubbles, comprising: a cover for the vessel, said cover inclined with respect to the horizontal and partially extending downwardly into said vessel; said cover having an end wall; said cover having side support walls, said side support walls residing upon said vessel; a screen having apertures; and a trough, said trough located beneath at least a portion of said screen for removing foam passing through said screen.
Claim 2
Dependent Claim
78 words
A foam removal apparatus for a vessel containing liquid and foam bubbles, comprising: a cover for the vessel, said cover inclined with respect to the horizontal and partially extending downwardly into said vessel; said cover having an end wall; said cover having side support walls, said side support walls residing upon said vessel; a screen having apertures; and a trough, said trough located beneath at least a portion of said screen for removing foam passing through said screen.
Claim 3
Dependent Claim
75 words
A foam removal apparatus according to claim 1, wherein said vessel has a first and a second end, said cover having a first end portion and a second end portion, said first end portion residing within said vessel and located juxtaposition to said first vessel end wall so that a sufficient distance exists between said first vessel end wall and said first cover end portion to permit the liquid in said vessel to rise therebetween.
Claim 4
Dependent Claim
34 words
A foam removal apparatus according to claim 2, wherein said cover end wall and said second cover end portion forming a junction, said screen extending between said junction and said second vessel end wall.
Claim 5
Dependent Claim
34 words
A foam removal apparatus according to claim 1, wherein said cover end wall extends between said cover and said trough, and including a second screen having apertures, said second screen located over said trough.
Claim 6
Dependent Claim
15 words
A foam removal apparatus according to claim 1, including a plurality of incline cover portions.
Claim 7
Dependent Claim
35 words
A foam removal apparatus according to claim 5, wherein said incline covers have an upper end portion, and include a plurality of screens, said screens extending from said upper inclined end portion to said trough.
Claim 8
Dependent Claim
15 words
A foam removal apparatus according to claim 6, including a screen extending over said trough.
Claim 9
Dependent Claim
65 words
A foam removal apparatus according to claim 5 or 6, wherein said covers partially extending down into said vessel have an end portion, said cover end portion residing within said vessel and located juxtaposition to a vessel end wall so that a sufficient distance exists between said vessel end wall and said cover end portion to permit the liquid in said vessel to rise therebetween.
Claim 10
Dependent Claim
16 words
A foam removal apparatus according to claim 2, wherein said trough is located beneath said screen.
Claim 11
Dependent Claim
19 words
A foam removal apparatus according to claim 1, including a second screen, said second screen located across said trough.
Claim 12
Dependent Claim
13 words
A foam removal apparatus according to claim 2, including a plurality of screens.
Claim 13
Dependent Claim
13 words
A foam removal apparatus according to claim 11, including a plurality of troughs.
Claim 14
Dependent Claim
17 words
A foam removal apparatus according to claim 2, wherein said trough is located externally of the vessel.
Claim 15
Dependent Claim
17 words
A foam removal apparatus according to claim 2, wherein said trough is located internally of the vessel.
Claim 16
Dependent Claim
20 words
A foam removal apparatus according to claim 2, wherein said screen is coated with a material to reduce the foam.
Claim 17
Dependent Claim
27 words
A foam removal apparatus according to claim 15, wherein said material coated on said screen is selected from the class consisting of methyl polysiloxane and dimethyl polysiloxane.
References Cited (Backward Citations)
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US3425899A
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GB1091199A
Cited
US3545937A
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US3873283A
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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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |