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US3927425A Expired / Lapsed US ⏱️ 0.0 years remaining

Sewerage treatment system

Assignee: Kidde Inc
•
Filing: 1974-04-22
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Granted: 1975-12-23
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Expires: 1994-04-22
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Abstract

Abstract A sewerage treatment system comprising a water closet, a bathing facility, first and second recirculating tanks each including filtering media for dividing the tanks into horizontally adjacent receptacle and filtrate compartments and a drain in the receptacle compartments thereof, means for selectively directing the effluent flushed from the water closet into the receptacle compartment of either recirculating tank, means for selectively directing the effluent from the bathing facility into either recirculating tank, means for selectively draining either recirculating tank, means for selectively recirculating the liquid in the filtrate compartment of either recirculating tank to the water closet for flushing same, means for operating the system in a first mode of operation wherein the effluent from the water closet is discharged into the receptacle compartment of the first recirculating tank, the liquid in the filtrate compartment of the first recirculating tank is selectively recirculated to the water closet, and the effluent from the bathing facility is discharged into the second recirculating tank, and means for alternately operating the system in a second mode of operation wherein the effluent from the water closet is discharged into the receptacle compartment of the second recirculating tank, the liquid in the filtrate compartment of the second recirculating tank is selectively recirculated to the water closet, and the effluent from the bathing facility is discharged into the first recirculating tank, and means for draining the first recirculating tank and for switching the system from the first mode of operation to the second mode of operation.

Inventors

  • 👤 R Edward Delaney
  • 👤 Alan H Cornish

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 14:26
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/016

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 248 words
A sewerage treatment system comprising water closet means, bathing facility means, first and second filtrate compartments, means including filtering media for selectively directing at least a portion of the liquid component of the effluent flushed from said water closet means into either of said first or second filtrate compartments, means for selectively directing at least a portion of the effluent discharge from said bathing facility means into either of said first or second filtrate compartments, means for selectively recirculating the liquid in either of said first or second filtrate compartments to said water closet means for flushing same, means for operating the system in a first mode of operation wherein at least a portion of the liquid component of the effluent flushed from said water closet means is directed into one of said filtrate compartments, the liquid in said one filtrate compartment is selectively recirculated to said water closet means, and at least a portion of the effluent discharged from said bathing facility means is directed into the other one of said filtrate compartments, and means for alternately operating the system in a second mode of operation wherein at least a portion of the liquid component of the effluent flushed from said water closet means is directed into the other filtrate compartment, the liquid in said other filtrate compartment is selectively recirculated to said water closet means, and at least a portion of the effluent discharged from said bathing facility means is directed into said one filtrate compartment.
Claim 2
Dependent Claim 248 words
A sewerage treatment system comprising water closet means, bathing facility means, first and second filtrate compartments, means including filtering media for selectively directing at least a portion of the liquid component of the effluent flushed from said water closet means into either of said first or second filtrate compartments, means for selectively directing at least a portion of the effluent discharge from said bathing facility means into either of said first or second filtrate compartments, means for selectively recirculating the liquid in either of said first or second filtrate compartments to said water closet means for flushing same, means for operating the system in a first mode of operation wherein at least a portion of the liquid component of the effluent flushed from said water closet means is directed into one of said filtrate compartments, the liquid in said one filtrate compartment is selectively recirculated to said water closet means, and at least a portion of the effluent discharged from said bathing facility means is directed into the other one of said filtrate compartments, and means for alternately operating the system in a second mode of operation wherein at least a portion of the liquid component of the effluent flushed from said water closet means is directed into the other filtrate compartment, the liquid in said other filtrate compartment is selectively recirculated to said water closet means, and at least a portion of the effluent discharged from said bathing facility means is directed into said one filtrate compartment.
Claim 3
Dependent Claim 20 words
A sewerage treatment system according to claim 1, wherein said water closet means comprises a plurality of toilets and/or urinals.
Claim 4
Dependent Claim 21 words
A sewerage treatment system according to claim 1, wherein said bathing facility means comprises a plurality of sinks and/or liquid drains.
Claim 5
Dependent Claim 62 words
A sewerage treatment system according to claim 1, wherein said means including filtering media for selectively directing at least a portion of the liquid component of the effluent flushed from said water closet means into either of said first or second filtrate compartments includes a receptacle compartment horizontally adjacent to each of said filtrate compartments and separated therefrom by said filtering media.
Claim 6
Dependent Claim 35 words
A sewerage treatment system according to claim 1, further comprising a source of makeup water and means for selectively introducing at least a portion thereof into either of said first or said second filtrate compartments.
Claim 7
Dependent Claim 53 words
A sewerage treatment system according to claim 5, further comprising second means for sensing when the fluid level in said one filtrate compartment during the first mode of operation substantially reaches the top thereof and for actuating said introducing means until the liquid level in said other filtrate compartment reaches said selected level.
Claim 8
Dependent Claim 29 words
A sewerage treatment system according to claim 1, further comprising a source of odor and/or color control additives and means for selectively introducing a portion thereof into the system.
Claim 9
Dependent Claim 75 words
A sewerage treatment system according to claim 1, further comprising means for switching the system from said first mode of operation to said second mode of operation, said switching means including means for selectively draining either of said first or second filtrate compartments and means for sensing when the liquid level in said first and second compartments reaches a selected level when the system is respectively operating in said second and first mode of operation.

References Cited (Backward Citations)

US1303358A Cited
US3112497A Cited
US3318449A Cited
US3535712A Cited
US3579646A Cited
US3543294A Cited
US3611447A Cited
US3633218A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-22 1979-06-23 1979-12-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-22 1983-06-23 1983-12-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-22 1987-06-23 1987-12-23 $7700.00 Window Closed / Lapsed

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