US3781920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste discharge valve for toilet bowl
Assignee: Teledyne Brown Engineering Inc
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Filing: 1972-06-21
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Granted: 1974-01-01
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Expires: 1992-06-21
Abstract
Abstract An improved waste discharge valve having a simplified mounting arrangement that generally facilitates final assembly to the flush bowl of a portable toilet. The preferred embodiment of the unique valve mounting arrangement simultaneously serves as a pivot axis about which the valve is freely movable. The preferred embodiment of the invention also utilizes a valve flap construction that is slightly dish-shaped so as to trap a small amount of flushing fluid and thereby form a water seal which prevents the passage of noxious odors from a holding tank located below the flush bowl.
Inventors
- 👤 R Browne
- 👤 J Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:23
CPC Classifications
E; E03; E03D; E03D11/00; E03D11/02; E03D11/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
A waste discharge valve adapted for mounting to the open lower end of a toilet flush bowl having a generally out-turned lip at the open lower end which defines a peripheral groove therearound, said valve comprising: a flap-like valve element adapted for positioning beneath and to cover the open lower end of the bowl; a generally C-shaped spring clip having leg portions adapted to securely embrace and engage said peripheral groove; said clip also having a base portion connecting the legs; and a hinge bracket connected at one end to said valve element and having adjacent said one end a bearing surface pivotally engaged with the base portion of the clip and having a counterweight on the other end thereof, whereby said counterweight normally urges said valve element upwardly against the lower end of the bowl but permits the combined weight of waste material on the valve element to pivot the latter downwardly to dump the collected waste material.
Claim 2
Dependent Claim
159 words
A waste discharge valve adapted for mounting to the open lower end of a toilet flush bowl having a generally out-turned lip at the open lower end which defines a peripheral groove therearound, said valve comprising: a flap-like valve element adapted for positioning beneath and to cover the open lower end of the bowl; a generally C-shaped spring clip having leg portions adapted to securely embrace and engage said peripheral groove; said clip also having a base portion connecting the legs; and a hinge bracket connected at one end to said valve element and having adjacent said one end a bearing surface pivotally engaged with the base portion of the clip and having a counterweight on the other end thereof, whereby said counterweight normally urges said valve element upwardly against the lower end of the bowl but permits the combined weight of waste material on the valve element to pivot the latter downwardly to dump the collected waste material.
Claim 3
Dependent Claim
38 words
A discharge valve as in claim 1, wherein the flap-like valve element is shaped in the form of a trough having a bottom sloping downwardly and away from the hinge bracket and terminating in an open discharge end.
Claim 4
Dependent Claim
61 words
A waste discharge valve as in claim 1, wherein at least part of the flap-like valve element is shaped in the form of a shallow dish having a bottom adapted to engage the entire lower edge of the bowl and to collect flushing liquid therein to thus provide a shallow water seal against the free escape of noxious gases from below.
References Cited (Backward Citations)
US139531A
Cited
US1091154A
Cited
US1144488A
Cited
US2401098A
Cited
US3566418A
Cited
US3545011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |