US3577568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water closet
Assignee: Individual
•
Filing: 1969-10-10
•
Granted: 1971-05-04
•
Expires: 1989-10-10
Abstract
Abstract A water closet using a very limited amount of flushing water owing to recirculation of the same by means of a pump system. The flushing liquid receptacle is positioned beneath the closet bowl and through said receptacle extends in the vertical direction a discharge pipe which at its lower end opens into a sludge tank and which has its upper end positioned vertically below the lower opening of the closet bowl. A disclike valve is adapted to provide preferably airtight sealing of the upper end of the discharge pipe.
Inventors
- 👤 Ole Bjerke Johansen
- 👤 Jan Ove Hertil Herveus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:13
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
An improved water closet comprising a closet bowl having a lower opening, a seat ring, and a closet bowl lid, flushing nozzles positioned at the top of said closet bowl, a pump for pumping liquid up to said flushing nozzles and a sludge tank, wherein the improvement comprises a container for flushing liquid positioned beneath the closet bowl and a discharge pipe arranged such that it extends vertically through said flushing liquid receptacle, the said discharge pipe opening at its lower end into the sludge tank and having its upper end positioned vertically below said lower opening of the closet bowl, the upper end preferably being sealed airtight by means of a valve which is spaced below said lower opening of the closet bowl forming an annular opening through which said flushing liquid may flow back into said container and a lever mechanism connected with the closet lid for pushing said valve in the lateral direction to open the upper end of the discharge pipe through raising of the closet lid.
Claim 2
Dependent Claim
171 words
An improved water closet comprising a closet bowl having a lower opening, a seat ring, and a closet bowl lid, flushing nozzles positioned at the top of said closet bowl, a pump for pumping liquid up to said flushing nozzles and a sludge tank, wherein the improvement comprises a container for flushing liquid positioned beneath the closet bowl and a discharge pipe arranged such that it extends vertically through said flushing liquid receptacle, the said discharge pipe opening at its lower end into the sludge tank and having its upper end positioned vertically below said lower opening of the closet bowl, the upper end preferably being sealed airtight by means of a valve which is spaced below said lower opening of the closet bowl forming an annular opening through which said flushing liquid may flow back into said container and a lever mechanism connected with the closet lid for pushing said valve in the lateral direction to open the upper end of the discharge pipe through raising of the closet lid.
Claim 3
Dependent Claim
29 words
An improved water closet in accordance with claim 1, wherein the improvement comprises a valve in the shape of a plate covering the upper end of the discharge pipe.
Claim 4
Dependent Claim
44 words
An improved water closet in accordance with claim 1, wherein the improvement comprises a fan, which is connected to a ventilation duct extending from the sludge tank, said fan functioning upon raising of the closet lid to evacuate foul gases from the sludge tank.
Claim 5
Dependent Claim
57 words
An improved water closet in accordance with claim 1, wherein the improvement comprises a pump which is started by closing of the closet lid to circulate the flushing liquid for a certain, predetermined period, a microswitch being arranged, when influenced by said lever mechanism, to switch on a timing relay to close the circuit to said pump.
References Cited (Backward Citations)
US367495A
Cited
US1161532A
Cited
DE898558C
Cited
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Cited
US3042933A
Cited
US3172131A
Cited
US3266060A
Cited
US3418664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |