Patent US5052060A successfully refreshed from Google Patents.
US5052060A
Expired / Lapsed
US
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Flush water supply system for toilet stool
Assignee: Toto Ltd
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Filing: 1990-03-29
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Granted: 1991-10-01
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Expires: 2010-03-29
Abstract
Abstract A flush water supply system comprising a passageway valve mounted in a pipeline for supplying flush water to a toilet stool, and a control circuit for controlling the closing and opening of the passageway valve. A constant flow valve is mounted in the pipeline for keeping a predetermined amount of discharge flow, irrespective of water supply pressure.
Inventors
- 👤 Atsuo Makita
- 👤 Hirofumi Takeuchi
- 👤 Shinji Shibata
- 👤 Noboru Shimbara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:17
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/10; E03D2201/00; E03D2201/30; Y; Y10; Y10S; Y10S4/00; Y10S4/03; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7848
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A flush water supply system for a toilet stool, comprising: (a) a pipeline means for supplying flush water to the toilet stool; (b) a constant flow valve mounted in said pipeline means for obtaining a predetermined amount of discharge flow, said constant flow valve including a water passage and means for adjusting the cross-sectional area of the water passage after the water supply pressure reaches a predetermined value; (c) a valve mounted in said pipeline means and electrically operable; (d) a starting-of-flushing input means for accepting an input for starting the supply of flush water; and (e) a control means for driving said electrically operable valve in response to the input for starting the supply of flush water, and for keeping said valve in an opened position for a preset period of time.
Claim 2
Dependent Claim
133 words
A flush water supply system for a toilet stool, comprising: (a) a pipeline means for supplying flush water to the toilet stool; (b) a constant flow valve mounted in said pipeline means for obtaining a predetermined amount of discharge flow, said constant flow valve including a water passage and means for adjusting the cross-sectional area of the water passage after the water supply pressure reaches a predetermined value; (c) a valve mounted in said pipeline means and electrically operable; (d) a starting-of-flushing input means for accepting an input for starting the supply of flush water; and (e) a control means for driving said electrically operable valve in response to the input for starting the supply of flush water, and for keeping said valve in an opened position for a preset period of time.
Claim 3
Dependent Claim
46 words
A flush water supply system according to claim 1, in which said constant flow valve variation in area provides a discharge flow characteristic such that the amount of discharge flow is restricted to a substantially constant value when the water supply pressure reaches a predetermined value.
Claim 4
Dependent Claim
49 words
A flush water supply system according to claim 1, in which said control means includes a timer circuit operable to start upon receipt of a starting signal from said starting-of-flushing input means, and a drive circuit for electrically amplifying the output of said timer circuit to drive said valve.
Claim 5
Dependent Claim
16 words
A flush water supply system according to claim 1, in which said valves are self-maintaining valves.
Claim 6
Dependent Claim
16 words
A flush water supply system according to claim 4 in which said self-maintaining valves are battery-operated.
References Cited (Backward Citations)
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |