US3853768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skimming apparatus
Assignee: Individual
•
Filing: 1973-01-10
•
Granted: 1974-12-10
•
Expires: 1993-01-10
Abstract
Abstract A skimming apparatus comprises means defining a chamber adapted to be partly submerged in a body of liquid and having an upper and lower zone. Admitting means for admitting liquid into the lower zone of the chamber is provided and sufficient liquid is maintained in the chamber so as to allow substances floating on the admitted liquid to rise and float inside the upper zone of the chamber. Discharging means discharges the skimmed liquid at a lower portion of the lower zone of the chamber and conveying means conveys the floating substances from the chamber.
Inventors
- 👤 L Bagnulo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:15
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/106; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/923
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
210 words
A skimming apparatus for skimming off surface-floating substances from liquids, comprising means defining a chamber adapted to be at least partially submerged in a body of liquid, said chamber-defining means including a lower wall portion which defines a lower zone of said chamber for accommodating liquid to be skimmed, and an upper wall portion which defines an upper zone of said chamber for accommodating substances floating on the liquid in said lower zone, said lower and upper wall portions overlapping one another, and said upper wall portion being located within the confines of said lower wall portion in the region of overlap and defining with said lower wall portion a gap in said region; admitting means for admitting liquid to be skimmed into said lower zone and being at least in part constituted by said gap; flotation and ballast means for regulating the extent to which said wall portions are submerged in the surrounding body of liquid and thereby the level of said gap with respect to the surface of the surrounding body of liquid, said flotation and ballast means comprising a liquidtight compartment in said lower wall portion; discharging means for discharging skimmed liquid from said lower zone; and conveying means for conveying floating substances from said upper zone.
Claim 2
Dependent Claim
210 words
A skimming apparatus for skimming off surface-floating substances from liquids, comprising means defining a chamber adapted to be at least partially submerged in a body of liquid, said chamber-defining means including a lower wall portion which defines a lower zone of said chamber for accommodating liquid to be skimmed, and an upper wall portion which defines an upper zone of said chamber for accommodating substances floating on the liquid in said lower zone, said lower and upper wall portions overlapping one another, and said upper wall portion being located within the confines of said lower wall portion in the region of overlap and defining with said lower wall portion a gap in said region; admitting means for admitting liquid to be skimmed into said lower zone and being at least in part constituted by said gap; flotation and ballast means for regulating the extent to which said wall portions are submerged in the surrounding body of liquid and thereby the level of said gap with respect to the surface of the surrounding body of liquid, said flotation and ballast means comprising a liquidtight compartment in said lower wall portion; discharging means for discharging skimmed liquid from said lower zone; and conveying means for conveying floating substances from said upper zone.
Claim 3
Dependent Claim
17 words
A skimming apparatus as defined in claim 1, wherein said wall portions are fast with one another.
Claim 4
Dependent Claim
71 words
A skimming apparatus as defined in claim 1, further comprising, tube means communicating with a source of liquid at one end and with said compartment at another end, transfer pump means for effecting transfer of liquid between said source and said compartment, and air passage means for escape of air from said compartment upon introduction of liquid thereto and for entry of air into said compartment upon removal of liquid therefrom.
Claim 5
Dependent Claim
35 words
A skimming apparatus as defined in claim 3, wherein said other end of said tube means communicates with said lower zone so as to permit transfer of liquid between said lower zone and said compartment.
Claim 6
Dependent Claim
69 words
A skimming apparatus as defined in claim 1, wherein said discharging means comprises an opening in a bottom of said chamber, a discharge fitting communicating with said opening, a diffuser communicating with said discharge fitting and with the surrounding body of liquid, and discharge pump means accomodated in said discharge fitting for effecting discharge of liquid from said chamber through said diffuser and into the surrounding body of liquid.
Claim 7
Dependent Claim
52 words
A skimming apparatus as defined in claim 1, wherein said conveying means comprises conduit means having one end communicating with said upper zone and another end communicating with receiving means, and delivery pump means for conveying the floating substances from said upper zone through said conduit means and into said receiving means.
Claim 8
Dependent Claim
21 words
A skimming apparatus as defined in claim 1, wherein said lower and upper wall portions are of substantially circular cross-sectional configuration.
Claim 9
Dependent Claim
20 words
A skimming apparatus as defined in claim 1, wherein said gap is complete in circumferential direction of said wall portions.
Claim 10
Dependent Claim
26 words
A skimming apparatus as defined in claim 1, wherein said discharging means is operative for discharging skimmed liquid at a lower portion of said lower zone.
Claim 11
Dependent Claim
26 words
A skimming apparatus as defined in claim 1, wherein said flotation and ballasting means further comprises an additional liquid-tight compartment defined by said upper wall portion.
Claim 12
Dependent Claim
50 words
A skimming apparatus as defined in claim 1, said lower wall portion having an upper end section provided with a surface portion facing inwardly of said chamber; and wherein said surface portion is of upwardly and outwardly flaring configuration so as to facilitate the flow of liquid into said gap.
Claim 13
Dependent Claim
20 words
A skimming apparatus as defined in claim 1, wherein said upper wall portion extends upwardly of said lower wall portion.
References Cited (Backward Citations)
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |