Patent US3568835A successfully refreshed from Google Patents.
US3568835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid separator and filter unit
Assignee: International Marketing Corp
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Filing: 1968-07-01
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Granted: 1971-03-09
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Expires: 1988-07-01
Abstract
Abstract An apparatus for separating water and other foreign material from a liquid such as diesel fuel and then filtering the fuel comprises a container having an inlet at its upper end for the liquid to be treated and means for subjecting the incoming liquid to the action of sufficient centrifugal force to separate water and heavier dirt particles to settle into the lower portion of the container. The fuel is then caused to flow upwardly through a valve to a final filter and is discharged from an outlet in the container. A float in the lower portion of the container has a density between that of water and the fuel and controls the opening and closing of the valve. As the float rises due to the accumulation of water in the bottom of the container the valve closes off the flow of fuel to the filter to prevent the delivery of contaminated fuel to the engine. The float also operates a warning signal to indicate the imminence of the closing of the valve, as well as an exit valve, previously opened, to provide a drain for the water and other materials which have been separated from the fuel.
Inventors
- 👤 Holger M Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:44
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/003; B01D21/00; B01D21/0012; B01D21/009; B01D21/26; B01D21/267; B01D21/30; B01D21/302; B01D21/307; B01D21/34; B01D35/00; B01D35/18; B01D2221/00; B01D2221/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
An apparatus according to claim 1 wHerein said dividing means comprises a substantially cylindrical container forming a chamber having a closable aperture through its bottom.
Claim 2
Dependent Claim
54 words
An apparatus according to claim 2 wherein said means for preventing upflow comprises a float having a density between those of the lighter and heavier liquids to be separated, means for resiliently supporting said float within said reservoir and means for discharging said heavier liquid and other foreign materials from the lower reservoir portion.
Claim 3
Dependent Claim
103 words
An apparatus according to claim 3 further comprising a warning device including a switch actuating device, a member operable to close the aperture into the chamber, means interengaging the float and the reservoir outlet means, the actuating device and the member whereby when the float is in its lower position the reservoir outlet is closed, the actuating device is open and the aperture is open, and as the level of the heavier liquid rises the float will rise thereby opening the reservoir outlet, causing the actuating device to close the switch setting off the warning device and closing the aperture in the chamber.
Claim 4
Dependent Claim
16 words
An apparatus according to claim 4 wherein said means for imparting centrifugal motion comprises helical baffles.
Claim 5
Dependent Claim
339 words
A liquid separator and filter unit comprising an outer cylindrical container having a liquid inlet and a filtered liquid outlet in its upper portion and a reservoir formed by its lower portion, a substantially cylindrical filter chamber for receiving filters disposed within the upper portion of said container in spaced relation thereto to define an annular path therebetween through which the liquid flows into said reservoir, said filter chamber having a bottom wall having an aperture therethrough separating said reservoir from the interior of said filter chamber, means disposed along said annular path to impart a circular motion to the liquid flowing through said path to subject the liquid to centrifugal force, thereby separating heavier liquid and solid constituents thereof and causing these to settle to the bottom of said reservoir, a drain outlet in the bottom of said reservoir through which said heavier constituents may be drained from said reservoir, the lighter constituents of the liquid flowing into said filter chamber, at least one filter unit disposed in said filter chamber through which the lighter liquid flows to said liquid outlet which is connected to said filter chamber, a float within said reservoir having a density between those of the lighter and heavier liquid constituents to be separated, means resiliently supporting said float within said reservoir, a discharge valve controlling flow through said drain outlet, a warning device including a switch actuating member disposed within said reservoir, a valve member operable to close said opening into said filter chamber, and means interengaging said float and said discharge valve, said switch actuating member and said valve member, whereby when said float is in its lower position said discharge valve is closed, the switch controlled by said actuating member is open and said valve member is open, and as the level of the heavier liquid constituent rises the float will rise to sequentially open said discharge valve, cause said actuating member to close said switch and move said valve member to a position closing said opening to said filter chamber.
Claim 6
Dependent Claim
34 words
A liquid separator and filter unit according to claim 6 wherein said means for supporting said float comprises a plurality of resilient links connected at their opposite ends to said float and said container.
Claim 7
Dependent Claim
49 words
A liquid separator and filter unit according to claim 7 wherein said links are pivotally connected at one end to the inner wall of said container and have their opposite ends slidably disposed within horizontal slots to allow angular movement of said links as said float rises and falls.
Claim 8
Dependent Claim
19 words
A liquid separator and filter unit according to claim 6 wherein said valve member is mounted on said float.
Claim 9
Dependent Claim
38 words
A liquid separator and fIlter unit according to claim 6 wherein the discharge valve is provided with a vertically reciprocable valve engageable with the underside of said float and spring means urging said valve to its open position.
Claim 10
Dependent Claim
58 words
A liquid separator and filter unit according to claim 7 wherein said switch actuating member comprises a vertically reciprocal plunger engageable with one of said links to open the switch when the float is in its lower position and a spring means urging said plunger upwardly to close the switch when said float rises to a predetermined level.
Claim 11
Dependent Claim
40 words
A liquid separator and filter unit according to claim 6 wherein said means for supporting said float comprises a series of resilient rings each connected at one point to said container and at a diametrically opposite point to said float.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |