Patent US3894299A successfully refreshed from Google Patents.
US3894299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual flush for toilets
Assignee: Individual
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Filing: 1974-05-29
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Granted: 1975-07-15
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Expires: 1994-05-29
Abstract
Abstract A dual flush system for toilets whereby a regulated partial amount of water may be used to flush the bowl comprising, in addition to a main valve, flush control means therefor, an overflow pipe and flush tank filling means, a spring-loaded valve inserted into the overflow pipe and separate control means for actuating the spring-loaded valve.
Inventors
- 👤 William P Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/02; E03D1/14; E03D1/142; E03D1/30; E03D1/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A dual flush system for a toilet whereby a regulated partial flush of the flush tank can be obtained comprising, in a conventional toilet, having an over flow pipe, spring-loaded secondary valve means disposed in the overflow pipe at a point intermediate the lower and upper ends thereof and separate flush control means for said spring-loaded secondary valve said springloaded secondary valve comprising a valve seat disposed in said overflow pipe, said valve seat being secured to said overflow pipe, a hollow tubular member supporting said valve at a position adjacent its lowermost end and extending through said valve communicating with the space in the overflow pipe below said valve seat when said valve is seated in said valve seat, and at least one hole in said overflow pipe provided in the wall of said overflow pipe above said valve seat whereby actuation of said separate flush control means releases water above the level of said hole into the bowl of said toilet.
Claim 2
Dependent Claim
163 words
A dual flush system for a toilet whereby a regulated partial flush of the flush tank can be obtained comprising, in a conventional toilet, having an over flow pipe, spring-loaded secondary valve means disposed in the overflow pipe at a point intermediate the lower and upper ends thereof and separate flush control means for said spring-loaded secondary valve said springloaded secondary valve comprising a valve seat disposed in said overflow pipe, said valve seat being secured to said overflow pipe, a hollow tubular member supporting said valve at a position adjacent its lowermost end and extending through said valve communicating with the space in the overflow pipe below said valve seat when said valve is seated in said valve seat, and at least one hole in said overflow pipe provided in the wall of said overflow pipe above said valve seat whereby actuation of said separate flush control means releases water above the level of said hole into the bowl of said toilet.
Claim 3
Dependent Claim
48 words
The dual flush system of claim 1 wherein the uppermost end of said tubular member extends at least as high as the uppermost end of the overflow pipe, thereby permitting overflow water to flow down through said tubular member below said valve seat and eventually into the bowl.
Claim 4
Dependent Claim
31 words
The dual flush system of claim 2 wherein said separate flush control means is operable independently of the main flush control means used to operate the main valve of the toilet.
Claim 5
Dependent Claim
60 words
The dual flush system of claim 3 wherein said flush control means comprises two separate handles each secured to separate rotatable shafts and separate lever means secured to each of said rotatable shafts and to each of said main and secondary valves, whereby when said handles are depressed, said shafts rotate thereby lifting said lever means which oPens said valves.
Claim 6
Dependent Claim
60 words
The dual flush system of claim 4 wherein said rotatable shaft of said separate flush control means is disposed concentrically within the rotatable shaft of the main flush control means and extends outwardly through the first handle which operates the main valve at which point the second handle is secured to the smaller shaft for operating the secondary valve means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |