Patent US3969774A successfully refreshed from Google Patents.
US3969774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flushing and refilling apparatus
Assignee: Hykon Patent AB
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Filing: 1974-12-12
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Granted: 1976-07-20
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Expires: 1994-12-12
Abstract
Abstract A flushing and refilling apparatus for use in a flushing cistern includes flushing and refilling valves, an overflow member and a common support having quick release coupling means for easy mounting and dismounting of said apparatus and said overflow member as a unit of assembled parts.
Inventors
- 👤 Frans Harry Karlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:14
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/36
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
226 words
A cistern flush and refill system comprising a cistern provided with an upper wall and a discharge opening in its bottom wall and an inlet connected to a source of liquid under pressure, said system further comprising, a flushing valve seat forming a passage between a lower part of the cistern and said discharge opening, an assembly comprising as assembled parts a common support, a refilling valve, a flushing valve and an overflow pipe, manually-operable coupling means for connecting said common support to said cistern and for permitting easily detachable connection of said common support to said cistern, said refilling valve mounted on said common support and having means for detachably connecting said refilling valve to said inlet, said flushing valve being movable between an open position and a closed position where it closes said flushing valve seat, seat overflow pipe communicating between said flushing valve seat and an upper level of said cistern, said overflow pipe being connected to said flushing valve for movement therewith and being movably supported on said common support to permit movement of the flushing valve between its open and closed positions, valve opening means connected to said flushing and refilling valves for opening said valves to start a flushing and refilling cycle, and valve closing means for closing said refilling valve, said closing means being connected to said refilling valve.
Claim 2
Dependent Claim
226 words
A cistern flush and refill system comprising a cistern provided with an upper wall and a discharge opening in its bottom wall and an inlet connected to a source of liquid under pressure, said system further comprising, a flushing valve seat forming a passage between a lower part of the cistern and said discharge opening, an assembly comprising as assembled parts a common support, a refilling valve, a flushing valve and an overflow pipe, manually-operable coupling means for connecting said common support to said cistern and for permitting easily detachable connection of said common support to said cistern, said refilling valve mounted on said common support and having means for detachably connecting said refilling valve to said inlet, said flushing valve being movable between an open position and a closed position where it closes said flushing valve seat, seat overflow pipe communicating between said flushing valve seat and an upper level of said cistern, said overflow pipe being connected to said flushing valve for movement therewith and being movably supported on said common support to permit movement of the flushing valve between its open and closed positions, valve opening means connected to said flushing and refilling valves for opening said valves to start a flushing and refilling cycle, and valve closing means for closing said refilling valve, said closing means being connected to said refilling valve.
Claim 3
Dependent Claim
47 words
A system as claimed in claim 1, wherein said common support extends upwardly in said cistern, said manually-operable means including a first quick release coupling member on said assembly at its lower end, a second quick release coupling member affixed to said cistern adjacent the bottom thereof.
Claim 4
Dependent Claim
44 words
A system as claimed in claim 1, wherein said assembly also includes the flushing valve seat, said seat being supported by said common support, said manually-operable means being a coupling device for connecting the flushing valve seat to the discharge opening of the cistern.
Claim 5
Independent Claim
28 words
A system as claimed in clam 1, wherein said overflow pipe extends through and is fixed to said flusing valve and forms part of said valve opening means.
Claim 6
Dependent Claim
66 words
A system as claimed in claim 1, wherein said common support comprises a housing having openings for free liquid communication between the cistern and the interior of said housing, said valve closing means comprising a float mounted in said housing, and connecting means for connecting said refilling valve and said float, said float being supported in said housing by said refilling valve via said connecting means.
Claim 7
Dependent Claim
20 words
A system as claimed in claim 5, having a buoyant body supported on said overflow pipe above said flushing valve.
Claim 8
Dependent Claim
82 words
A system as claimed in claim 5, wherein said overflow pipe extends through and is affixed to said flushing valve, said overflow pipe communicating between said discharge opening and the upper portion of said cistern, said float in said housing having a central opening, said overflow pipe extending upwardly through said opening in said float and having a diameter which is less than the diameter of said opening, whereby said overflow pipe and said float are movable in relation to each other.
Claim 9
Dependent Claim
43 words
A system as claimed in claim 7, wherein said housing has a partition below said float, said partition having a central opening for free passage of said overflow pipe, elastic sealing means on said overflow pipe to seal the opening in said partition.
Claim 10
Dependent Claim
33 words
A system as claimed in claim 7, having a link movably suspending said float in said housing, a crank fixed to the refilling valve, and a pivot connecting said link to said crank.
Claim 11
Dependent Claim
28 words
A system as claimed in claim 1, wherein said coupling means is a bayonet clutch for connecting the lower end of said support to said flushing valve seat.
Claim 12
Dependent Claim
28 words
A system as claimed in claim 1, wherein said coupling means is a quick coupler between the flushing valve seat and said discharge opening in said cistern bottom.
Claim 13
Dependent Claim
41 words
A system as claimed in claim 1, wherein said common support has a guide portion which forms a guide for the valve opening means, means for detachably connecting the guide portion to an opening in the upper wall of a cistern.
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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |