Patent US4876011A successfully refreshed from Google Patents.
US4876011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery apparatus
Assignee: Donaldson Co Inc
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Filing: 1988-05-17
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Granted: 1989-10-24
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Expires: 2008-05-17
Abstract
Abstract An apparatus for skimming oil from the surface of a liquid is disclosed. The apparatus includes an endless belt which is formed from the loop portion of a loop and hook type fastener. The belt is supported to move in a path of travel with a portion of the belt disposed within the liquid. As the belt travels, oil is captured within the material of the belt. A scraping mechanism is provided for scraping an initial amount of oil off of the belt. Rollers are provided for squeezing out the remaining oil on the belt. Oil which is removed by the scrapers and the rollers is captured in a pan and collected.
Inventors
- 👤 Peter Betts
- 👤 Darrell D. Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:47
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/104; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/923; Y10S210/924
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
An apparatus for skimming oil from the surface of a liquid, said apparatus comprising: an endless belt of hydrophobic non-absorbent material formed from a plurality of densely packed loops from the loop portion of a hook and loop type fastener; support means for supporting a first portion of said belt above said liquid; submersion means for submersing a second portion of said belt within said liquid; drive means for urging said belt to travel about said support means and said submersion means with said support means and said submersion means dividing said belt into two runs including a first run moving from said support means to said submersion means and a second run moving from said submersion means to said support means with said oil captured on said second run; means for separating said captured oil from said second run above said liquid; and means for collecting said separated oil.
Claim 2
Independent Claim
150 words
An apparatus for skimming oil from the surface of a liquid, said apparatus comprising: an endless belt of hydrophobic non-absorbent material formed from a plurality of densely packed loops from the loop portion of a hook and loop type fastener; support means for supporting a first portion of said belt above said liquid; submersion means for submersing a second portion of said belt within said liquid; drive means for urging said belt to travel about said support means and said submersion means with said support means and said submersion means dividing said belt into two runs including a first run moving from said support means to said submersion means and a second run moving from said submersion means to said support means with said oil captured on said second run; means for separating said captured oil from said second run above said liquid; and means for collecting said separated oil.
Claim 3
Dependent Claim
44 words
An apparatus according to claim 1 further comprising an idler disposed to retain said second run above said liquid layer at a first elevation; and scraper means disposed on a side of said idler adjacent said first run for scraping oil from said belt.
Claim 4
Dependent Claim
68 words
An apparatus according to claim 2 wherein said scraper means includes a first scraper bar having a first scraping surface disposed beneath said first elevation and facing downwardly and a second scraper bar with a second scraping surface facing upwardly and disposed above said first scraping surface with said belt disposed to travel from said first elevation beneath said first scraping surface and above said second scraping surface.
Claim 5
Dependent Claim
42 words
An apparatus according to claim 1 wherein said support means includes an idler having a rotary shaft disposed for rotation about a generally horizontal axis and having a plurality of radially projecting axially extending vanes with said belt disposed above said idler.
Claim 6
Dependent Claim
46 words
An apparatus according to claim 1 further comprising a pair of rollers disposed in close parallel alignment with said second run disposed to pass between said rollers and said rollers spaced apart a distance to compress said belt material as said belt passes between said roller.
Claim 7
Dependent Claim
32 words
An apparatus according to claim 5 wherein said drive means includes a motor operably connected to at least one of said rollers to rotate said roller and urge said belt to travel.
Claim 8
Independent Claim
162 words
An apparatus for skimming oil floating on the surface of a liquid, said apparatus comprising: an endless belt of hydrophobic non-absorbent material formed from a plurality of densely packed loops from the loop portion of a hook and loop type fastener; an idler disposed above said liquid; a pair of rollers disposed above said liquid in close parallel alignment; a submersed pulley disposed within said liquid; said belt disposed to extend over said idler, between said rollers and beneath said submersed pulley; means for urging said belt to travel from said idler to said rollers beneath said submersed pulley and back to said idler with said material capturing oil and retaining said captured oil as said belt moves from said liquid surface around said idler; said rollers formed of non-absorbent material and spaced closely together to compress said material as said belt passes between said rollers to release said captured oil; and means for collecting said captured oil released by said rollers.
Claim 9
Independent Claim
162 words
An apparatus for skimming oil floating on the surface of a liquid, said apparatus comprising: an endless belt of hydrophobic non-absorbent material formed from a plurality of densely packed loops from the loop portion of a hook and loop type fastener; an idler disposed above said liquid; a pair of rollers disposed above said liquid in close parallel alignment; a submersed pulley disposed within said liquid; said belt disposed to extend over said idler, between said rollers and beneath said submersed pulley; means for urging said belt to travel from said idler to said rollers beneath said submersed pulley and back to said idler with said material capturing oil and retaining said captured oil as said belt moves from said liquid surface around said idler; said rollers formed of non-absorbent material and spaced closely together to compress said material as said belt passes between said rollers to release said captured oil; and means for collecting said captured oil released by said rollers.
Claim 10
Dependent Claim
63 words
An apparatus according to claim 7 further comprising scraper means disposed against said belt between said rollers and idler including a first scraper bar with a first scraping surface and a second scraper bar with a second scraping surface with said belt disposed to pass between said bars with opposition surfaces of said belt alternately scraped by said first and second scraping surfaces.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 7 wherein said rollers are formed of polyurethane.
Claim 12
Independent Claim
249 words
An apparatus for skimming oil from the surface of a liquid, said apparatus comprising: an endless belt of hydrophobic non-absorbent material formed from a plurality of densely packed loops from the loop portion of a hook and loop type fastener; an idler disposed above said liquid; a pair of rollers disposed above said liquid in close parallel alignment; a submersed pulley disposed within said liquid; first and second scraper bars having first and second scraping surfaces disposed between said idler and said rollers; said belt disposed to extend over said idler and pass said scraper bars with opposite sides of said belt engaging said first and second scraping surfaces, respectively with said belt extending from said scraper bars to between said rollers and beneath said submersed pulley; means for urging said belt to travel from said idler past said scraper bars, through said rollers and beneath said submersed pulley and back to said idler with said material capturing oil and retaining said captured oil as said belt moves from said liquid surface around said idlers; said scraper bars and idler disposed for said surfaces of said belt to scape against said scraping surfaces with said scraping surfaces removing an initial amount of oil from said belt and said rollers formed of non-absorbent material and spaced closely together to compress said material as said belt passes between said rollers to release captured oil not scraped by said scrapers; and means for collecting oil released by said scrapers and said rollers.
Claim 13
Independent Claim
249 words
An apparatus for skimming oil from the surface of a liquid, said apparatus comprising: an endless belt of hydrophobic non-absorbent material formed from a plurality of densely packed loops from the loop portion of a hook and loop type fastener; an idler disposed above said liquid; a pair of rollers disposed above said liquid in close parallel alignment; a submersed pulley disposed within said liquid; first and second scraper bars having first and second scraping surfaces disposed between said idler and said rollers; said belt disposed to extend over said idler and pass said scraper bars with opposite sides of said belt engaging said first and second scraping surfaces, respectively with said belt extending from said scraper bars to between said rollers and beneath said submersed pulley; means for urging said belt to travel from said idler past said scraper bars, through said rollers and beneath said submersed pulley and back to said idler with said material capturing oil and retaining said captured oil as said belt moves from said liquid surface around said idlers; said scraper bars and idler disposed for said surfaces of said belt to scape against said scraping surfaces with said scraping surfaces removing an initial amount of oil from said belt and said rollers formed of non-absorbent material and spaced closely together to compress said material as said belt passes between said rollers to release captured oil not scraped by said scrapers; and means for collecting oil released by said scrapers and said rollers.
Claim 14
Dependent Claim
13 words
An apparatus according to claim 10 wherein said rollers are formed of polyurethane.
Claim 15
Dependent Claim
26 words
An apparatus according to claim 10 wherein said endless belt is formed of a hydrophobic non-absorbent material woven to form the plurality of densely packed loops.
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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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |