US3996136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump-filter for bilge water
Assignee: Individual
•
Filing: 1974-12-04
•
Granted: 1976-12-07
•
Expires: 1994-12-04
Abstract
Abstract A housing for a bilge pump-filter has a lower part in which oil and like light pollutants are separated from the polluted water. A pump has its intake connected to the lower region of this lower part and its output connected to an upper compartment of a compensation chamber in the upper housing part which is subdivided by a filter into this upper compartment and a lower compartment. A funnel under the filter conducts liquid coming down through the filter by gravity to the lower region of the lower compartment and a drain at the upper region of this lower compartment off the filter water. A level detector in the lower separation chamber operates the pump only when liquid level in this separation chamber is above a predetermined minimum level.
Inventors
- 👤 Peter Jakubek
- 👤 Karl Biswanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:47
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/0208; B01D17/0214; B01D17/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
218 words
An apparatus for purifying a polluted liquid containing a liquid pollutant having a lower specific gravity than said polluted liquid, said apparatus comprising: a separating chamber; means for introducing said polluted liquid into the upper region of said separating chamber whereby said liquid undergoes therein a preseparation with said pollutant rising to the surface of said liquid; sensor means for detecting the liquid level in said separating chamber; a compensation chamber above said separating chamber having a filter above said sensor means subdividing said compensation chamber into an upper compartment and a lower compartment, said lower compartment being sealed from said separating chamber; a pump disposed at a level above the bottom of said separating chamber and below said compensation chamber, said pump having an intake side connected to the lower region of said separating chamber and an output side connected to said upper compartment for withdrawing said liquid from said separating chamber and introducing same into said chamber; a duct for drawing filtered liquid from said lower compartment; an inlet opening into said separating chamber for delivering said polluted liquid thereto, said inlet having a check valve only permitting liquid flow into said separating chamber; and control means connected to said sensor means for operating said pump only when said liquid level is above a predetermined level.
Claim 2
Independent Claim
218 words
An apparatus for purifying a polluted liquid containing a liquid pollutant having a lower specific gravity than said polluted liquid, said apparatus comprising: a separating chamber; means for introducing said polluted liquid into the upper region of said separating chamber whereby said liquid undergoes therein a preseparation with said pollutant rising to the surface of said liquid; sensor means for detecting the liquid level in said separating chamber; a compensation chamber above said separating chamber having a filter above said sensor means subdividing said compensation chamber into an upper compartment and a lower compartment, said lower compartment being sealed from said separating chamber; a pump disposed at a level above the bottom of said separating chamber and below said compensation chamber, said pump having an intake side connected to the lower region of said separating chamber and an output side connected to said upper compartment for withdrawing said liquid from said separating chamber and introducing same into said chamber; a duct for drawing filtered liquid from said lower compartment; an inlet opening into said separating chamber for delivering said polluted liquid thereto, said inlet having a check valve only permitting liquid flow into said separating chamber; and control means connected to said sensor means for operating said pump only when said liquid level is above a predetermined level.
Claim 3
Dependent Claim
31 words
The apparatus defined in claim 1 wherein said compensation chamber is provided with a conduit extending from the lower side of said filter to the lower region of said lower compartment.
Claim 4
Dependent Claim
14 words
The apparatus defined in claim 2 wherein said conduit is formed as a funnel.
Claim 5
Dependent Claim
29 words
The apparatus defined in claim 3 wherein said sensor means includes a float in said separation chamber and a switch operatively connected to said float and to said pump.
Claim 6
Dependent Claim
30 words
The apparatus defined in claim 4 wherein said switch is a reed switch fixed in said separation chamber at said predetermined level and said float is provided with a magnet.
Claim 7
Dependent Claim
28 words
The apparatus defined in claim 2 wherein said housing is generally cylindrical and said upper part is provided with a lower edge threadedly engageable with said lower part.
Claim 8
Dependent Claim
28 words
The apparatus defined in claim 2 wherein said liquid-draining means duct includes a valve for regulating fluid flow therethrough and thereby regulating fluid flow into said compensation chamber.
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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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |