Patent US3707232A successfully refreshed from Google Patents.
US3707232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skimmers for pollution control device
Assignee: Individual
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Filing: 1970-10-20
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Granted: 1972-12-26
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Expires: 1990-10-20
Abstract
Abstract Floating skimmers slidable on an intake conduit having means counteracting the internal pressure drop normally incident to the intake operation. In one embodiment, the cone member has upper vent openings and an internal cylindrical part around the conduit and depending down to near the bottom of the cone. In a second embodiment, the upper cone member is connected pneumatically to the internal chamber of a bellows and the moveable part of the bellows is connected structurally to the cone. In both embodiments, the upper cone has a horizontal flange and the lower float has a flat surface extending slightly past the flange and positioned close to the flange in normal use.
Inventors
- 👤 John W Harrington
- 👤 Edward G Milne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:55
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/106; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/923
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A float mounted pump intake for skimming liquids from the surface of a liquid body comprising: a. a conduit extending upwardly from the surface of said liquid body; b. hose means connecting an upper end of said conduit with a pump inlet; c. a floatable hollow member comprising a first small end surrounding said conduit and in sliding engagement with said conduit and a second large open end in sealing engagement with the surface of said liquid body, said floatable hollow member having means for counteracting reduction in the internal pressure within said floatable hollow member, incident to intake through said pump intake; d. inlet means to said conduit constructed and arranged interiorly of said floatable hollow member and in communication with the surface of said liquid body; and e. float means substantially rigidly secured to said conduit.
Claim 2
Dependent Claim
138 words
A float mounted pump intake for skimming liquids from the surface of a liquid body comprising: a. a conduit extending upwardly from the surface of said liquid body; b. hose means connecting an upper end of said conduit with a pump inlet; c. a floatable hollow member comprising a first small end surrounding said conduit and in sliding engagement with said conduit and a second large open end in sealing engagement with the surface of said liquid body, said floatable hollow member having means for counteracting reduction in the internal pressure within said floatable hollow member, incident to intake through said pump intake; d. inlet means to said conduit constructed and arranged interiorly of said floatable hollow member and in communication with the surface of said liquid body; and e. float means substantially rigidly secured to said conduit.
Claim 3
Dependent Claim
36 words
Apparatus as in claim 1 wherein said means for counteracting the internal pressure drop comprises a pneumatic path providing pneumatic communication between the internal chamber defined by said floatable hollow member and a body of air.
Claim 4
Dependent Claim
32 words
Apparatus as in claim 1 wherein said pneumatic path is an opening defined by said floatable hollow member and allows said internal chamber of said float to communicate with the outside atmosphere.
Claim 5
Dependent Claim
47 words
Apparatus as in claim 1 wherein the internal chamber defined by said hollow member communicates through said pneumatic path with an expansible air chamber which slideably adjusts the position of said hollow member in response to the pressure in said internal chamber defined by said hollow member.
Claim 6
Dependent Claim
43 words
Apparatus as in claim 4 wherein said expansible chamber comprises first and second elements, said first element secured to said conduit and said second element secured to said hollow member, said first and said second elements being operatively connected to form a chamber.
Claim 7
Dependent Claim
34 words
Apparatus as in claim 5 wherein said air chamber further comprises a pliable band which maintains the seal between said first and second elements while allowing relative movement of said first and second elements.
Claim 8
Dependent Claim
30 words
Apparatus as in claim 6 further comprising plate means secured to and disposed around said float means to define with said hollow member a path for the intake of oil.
Claim 9
Dependent Claim
22 words
Apparatus as in claim 7 further comprising a stop lodged in said float means to limit the sliding of said hollow member.
Claim 10
Dependent Claim
28 words
Apparatus as in claim 8 wherein said hollow member comprises a frusto-conical element secured to a cylindrical element and said frusto-conical element forms said second large open end.
Claim 11
Dependent Claim
30 words
Apparatus as in claim 3 further comprising plate means secured to and disposed around said float means to define with said hollow member a path for the intake of oil.
Claim 12
Dependent Claim
28 words
Apparatus as in claim 10 wherein said hollow member comprises a frusto-conical element secured to a cylindrical element and said frusto-conical element forms said second large open end.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |