US3791618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quiet flow device for flush valves
Assignee: Sloan Valve Co
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Filing: 1972-05-01
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Granted: 1974-02-12
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Expires: 1992-05-01
Abstract
Abstract A piston type flush valve having a main valve seat in the body is provided with a ring-shaped quieting device adjacent the main valve seat to quiet the water flow during the closing off action of the valve.
Inventors
- 👤 A Nelson
- 👤 R Spacko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
E; E03; E03D; E03D9/00; E03D9/14; F; F16; F16K; F16K47/00; F16K47/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
215 words
In a flush valve, a body having an inlet and an outlet with a water passage therebetween, a valve seat in said body around said passage, a piston slidable in said body for controlling the flow of water through said passage and to close upon said valve seat, a guide member supported on the bottom of said piston and positioned within said water passage, said guide member having a refill head formed thereon arranged in close proximity of said valve seat in the valve closed position in said passage, said valve seat comprising a ring-shaped member supported in said body around said water passage, a quiet flow device supported in said body around said water passage and adjacent said valve seat, said quiet flow device comprising a ring-shaped member having a series of grooves and teeth formed around its inner diameter projecting in alignment with said water passage, and in which the grooves and teeth extend vertically for the full height of the quiet flow device, the teeth being slightly rounded at the top end to guide the refill head into the water passage as the valve closes upon the valve seat, whereby water flow is quieted as said refill head enters said water passage and prior to complete valve closure upon said valve seat.
Claim 2
Dependent Claim
215 words
In a flush valve, a body having an inlet and an outlet with a water passage therebetween, a valve seat in said body around said passage, a piston slidable in said body for controlling the flow of water through said passage and to close upon said valve seat, a guide member supported on the bottom of said piston and positioned within said water passage, said guide member having a refill head formed thereon arranged in close proximity of said valve seat in the valve closed position in said passage, said valve seat comprising a ring-shaped member supported in said body around said water passage, a quiet flow device supported in said body around said water passage and adjacent said valve seat, said quiet flow device comprising a ring-shaped member having a series of grooves and teeth formed around its inner diameter projecting in alignment with said water passage, and in which the grooves and teeth extend vertically for the full height of the quiet flow device, the teeth being slightly rounded at the top end to guide the refill head into the water passage as the valve closes upon the valve seat, whereby water flow is quieted as said refill head enters said water passage and prior to complete valve closure upon said valve seat.
Claim 3
Dependent Claim
130 words
The combination of a quiet flow device and a valve seat for a flush valve, said valve seat being ring-shaped and having an inner stepped portion thereon, said quiet flow device being ring-shaped and having an outer stepped portion thereon, said quiet flow device being press fitted into the inner diameter of said valve seat so that the stepped portions of each member fit together and form a unitary structure readily adapted to be inserted into said flush valve, said quiet flow device having a series of alternate grooves and teeth arranged around the inner circumference thereof, said grooves and teeth being vertically disposed with the upper ends of the teeth rounded off, and means on said valve seat for holding said unitary structure in position in the flush valve.
Claim 4
Dependent Claim
130 words
The combination of a quiet flow device and a valve seat for a flush valve, said valve seat being ring-shaped and having an inner stepped portion thereon, said quiet flow device being ring-shaped and having an outer stepped portion thereon, said quiet flow device being press fitted into the inner diameter of said valve seat so that the stepped portions of each member fit together and form a unitary structure readily adapted to be inserted into said flush valve, said quiet flow device having a series of alternate grooves and teeth arranged around the inner circumference thereof, said grooves and teeth being vertically disposed with the upper ends of the teeth rounded off, and means on said valve seat for holding said unitary structure in position in the flush valve.
Claim 5
Dependent Claim
51 words
The combination of the quiet flow device and valve seat as claimed in claim 2 in which the height of the quiet flow device is such that it is slightly below the height of the valve seat so as not to interfere with the closure of the valve upon the seat.
Claim 6
Dependent Claim
44 words
The combination of the quiet flow device and valve seat as claimed in claim 2 in which the valve seat is provided with a projecting portion around its outer diameter to provide a press fit into a recess formed in the flush valve body.
Claim 7
Dependent Claim
42 words
The combination of the quiet flow device and valve seat as claimed in claim 2 in which the valve seat is molded of flexible rubber having a reinforcing ring imbedded therein, and the quiet flow device is molded of DELRIN acetal plastic.
Claim 8
Dependent Claim
67 words
The combination of the quiet flow device and valve seat as claimed in claim 2 in which the number of grooves and teeth around the inner circumference of said quiet flow device totals approximately 120 and each tooth projects outward from the device a distance of about 0.32 inches and has a width of about 0.0167 inches, for optimum quietness in the water flow through the device.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |