Patent US3663970A successfully refreshed from Google Patents.
US3663970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pneumatic transportation of sanitary waste from a toilet to a holding tank
Assignee: Interface Inc
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Filing: 1970-03-30
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Granted: 1972-05-23
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Expires: 1990-03-30
Abstract
Abstract A system for pneumatically transporting sanitary waste from a toilet to a holding tank. The holding tank communicates with the toilet through a relatively small diameter transfer conduit. The toilet has a trapless bowl portion with a valve means selectively to open and close a drain in the bowl portion. Beneath the bowl portion is a macerating portion. A vacuum pump is provided to reduce the pressure within the holding tank, transfer conduit and the macerating portion of the toilet below atmospheric. The effluent is swept through the transfer conduit to the holding tank in a series of pulsations that mark the discontinuous entrance of the heterogeneous agglomeration into the orifice means. The tank itself includes a discriminating means to prevent the material therein from being pumped out by the vacuum pump.
Inventors
- 👤 Alfred J Drouhard Jr
- 👤 Joseph B Stinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:50
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/006
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
149 words
A sewage handling system comprising, a holding tank, a toilet having a bowl portion and a macerating portion terminating in an orifice means, the bowl portion communicating with the macerating portion across a drain, a conduit connected between said orifice means and said holding tank, the cross sectional area of said orifice means being less than the cross sectional area of said conduit, a valve means operative to open and sealingly close said drain, means for applying a partial vacuum to said holding tank, conduit and the macerating portion of said toilet at least when said valve means sealingly closes said drain, means to admit fluid into said bowl portion and means selectively to actuate said valve means whereby agglomerated waste material after passing from said bowl portion through said drain and the valve opening of said valve means is fragmentized by a pressure differential across said orifice means.
Claim 2
Dependent Claim
149 words
A sewage handling system comprising, a holding tank, a toilet having a bowl portion and a macerating portion terminating in an orifice means, the bowl portion communicating with the macerating portion across a drain, a conduit connected between said orifice means and said holding tank, the cross sectional area of said orifice means being less than the cross sectional area of said conduit, a valve means operative to open and sealingly close said drain, means for applying a partial vacuum to said holding tank, conduit and the macerating portion of said toilet at least when said valve means sealingly closes said drain, means to admit fluid into said bowl portion and means selectively to actuate said valve means whereby agglomerated waste material after passing from said bowl portion through said drain and the valve opening of said valve means is fragmentized by a pressure differential across said orifice means.
Claim 3
Dependent Claim
18 words
A sewage handling system, as set forth in claim 1, in which said orifice means is an elbow.
Claim 4
Dependent Claim
26 words
A sewage handling system, as set forth in claim 1, in which said macerating portion has a throat portion that tapers downwardly to said orifice means.
Claim 5
Dependent Claim
40 words
A sewage handling system, as set forth in claim 1, in which said macerating portion has a drop well immediately beneath the drain of said bowl, said drop well adjoining a throat portion that tapers downwardly to said orifice means.
Claim 6
Dependent Claim
44 words
A sewage handling system, as set forth in claim 4, in which said drop well has a cross sectional area at least equal to the area of said drain and said orifice means is spaced at least 3 to 5 inches below said drain.
Claim 7
Dependent Claim
46 words
A sewage handling system, as set forth in claim 1, in which the means for applying a partial vacuum comprises a pump connected to said holding tank through a fluid discriminating means to prevent inadvertent drainage of the material in said holding tank to said pump.
Claim 8
Dependent Claim
47 words
A sewage handling system, as set forth in claim 6, in which said fluid discriminating means comprises a housing, a valve seat within said housing, a float movable in said housing, a valve element carried on said float and movable into sealing engagement with said valve seat.
Claim 9
Dependent Claim
45 words
A sewage handling system, as set forth in claim 7, in which the discriminating means has a relief bore communicating between the interior of the holding tank and the interior of said discriminating means, said bore being located between said valve seat and said pump.
Claim 10
Dependent Claim
24 words
A sewage handling system, as set forth in claim 6, in which a check valve is incorporated between said pump and said holding tank.
Claim 11
Dependent Claim
57 words
A sewage handling system, as set forth in claim 6, in which said pump is of the diaphragm variety, a vacuum switch communicates with that portion of the system to which the partial vacuum is supplied, said switch having a distensible actuating diaphragm, an aperture provided through said diaphragm to modulate the pulsating effect of said pump.
Claim 12
Dependent Claim
33 words
A sewage handlinG system, as set forth in claim 4, in which the valve means comprises a movable element mounted in the macerating portion and engaging a valve seat to close the drain.
Claim 13
Dependent Claim
26 words
A sewage handling system, as set forth in claim 11, in which said valve seat employs a resilient base interposed between said bowl and macerating portions.
Claim 14
Dependent Claim
53 words
A sewage handling system, as set forth in claim 12, in which said resilient base has a lower surface, a facing ring being embedded in and bonded to said base, said facing ring having a lower surface, the lower surface of said facing ring lying coplanar with the lower surface of said base.
Claim 15
Dependent Claim
69 words
A sewage handling system, as set forth in claim 13, in which said macerating portion has a V-shaped receiving edge over which said bowl is seated, a backing material within said V-shaped edge, the level of said backing material lying just beneath the upper extent of said V-shaped edge, a portion of said base and a portion of said facing ring being captured between said bowl and macerating portions.
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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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |