Patent US3785394A successfully refreshed from Google Patents.
US3785394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water control valve structure
Assignee: Trane US Inc
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Filing: 1972-07-12
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Granted: 1974-01-15
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Expires: 1992-07-12
Abstract
Abstract Covers a water control valve for the water tank of a toilet bowl in which the valve structure is constructed for better and more positive anti-siphonic action. The valve structure includes a plunger which is coupled by a lever arm to a float so that the plunger may move vertically within a chamber having a tapered wall in response to changes in the level of water in the tank. The chamber has an opening at the bottom for a valve seat which may be sealed by an elastomer affixed to the base of the plunger when the plunger reaches its lowermost position to close the valve. Near its upper end, the plunger has a collar for loosely supporting two elastomer disks of considerable elasticity to seal the upper end of the chamber for the anti-siphonic action. An additional flexible elastomer element is positioned on another collar of the plunger and is spaced from the tapered wall of the chamber throughout the stroke of the plunger in either direction. The anti-siphonic disks are located within a housing having a cap with a plurality of holes therein through which air may be admitted, and the cap is also provided with an overhanging canopy which blocks the admission of foreign matter to the chamber while permitting air to enter the chamber. The cap is joined to a body member to complete the housing, the body member providing the chamber in which the plunger is freely movable.
Inventors
- 👤 F Dixon
- 👤 S Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:44
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; F16K31/26; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7446
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
220 words
Anti-siphonic valve mechanism for the water tank of a toilet bowl, comprising, in addition to the water tank, an open-ended chamber having a water input opening at its lower end and a plunger which is movable axially within the chamber and includes mechanism having a flexible disk device above the open end of the chamber, the plunger being seated to close the water input opening of the chamber when the water in the tank reaches a predetermined upper level, a housing enclosing the chamber and the plunger and having a roof with substantially horizontal air openings therein to receive air into said housing and having a canopy integral with and overhanging said roof openings and also having additional communicating protective air openings therein beneath said canopy, each individually communicating with one of said roof openings, to allow air to flow through said additional air openings and through said roof openings into said housing, the flexible disk of the piston being lifted to close said roof openings when pressurized water enters the chamber through the water input opening but the peripheral region of the flexible disk is promptly turned down to seal the open-ended chamber when the fluid pressure within the chamber becomes negative to thereby prevent the reverse flow of water from the water tank to and through the chamber.
Claim 2
Dependent Claim
220 words
Anti-siphonic valve mechanism for the water tank of a toilet bowl, comprising, in addition to the water tank, an open-ended chamber having a water input opening at its lower end and a plunger which is movable axially within the chamber and includes mechanism having a flexible disk device above the open end of the chamber, the plunger being seated to close the water input opening of the chamber when the water in the tank reaches a predetermined upper level, a housing enclosing the chamber and the plunger and having a roof with substantially horizontal air openings therein to receive air into said housing and having a canopy integral with and overhanging said roof openings and also having additional communicating protective air openings therein beneath said canopy, each individually communicating with one of said roof openings, to allow air to flow through said additional air openings and through said roof openings into said housing, the flexible disk of the piston being lifted to close said roof openings when pressurized water enters the chamber through the water input opening but the peripheral region of the flexible disk is promptly turned down to seal the open-ended chamber when the fluid pressure within the chamber becomes negative to thereby prevent the reverse flow of water from the water tank to and through the chamber.
Claim 3
Dependent Claim
32 words
Anti-siphonic valve mechanism according to claim 1 including means responsive to the level of the water within the tank to control the movement of the plunger along the axis of the chamber.
Claim 4
Dependent Claim
205 words
A water control valve for the water tank of a toilet bowl, comprising, in addition to the water tank, an open-ended chamber having a circular cross-section positioned for admitting pressurized water at an inlet at the base of the chamber, a plunger movable along the axis of the chamber and seatable on said inlet to close the Valve, means for moving the plunger upwardly along its axis to open said inlet when water is to be fed through said chamber and into said water tank, a plurality of flexible contiguous anti-siphon disks mounted on said plunger near the upper end thereof, a housing enclosing said valve and having at or near the upper end thereof a plurality of first openings through which air may be received, and a canopy surmounted integrally on said housing having protective second openings each individually communicating respectively with said first openings to permit air to enter said chamber through said first openings in the housing and through the second openings in said canopy but to block the droppage of foreign matter into said chamber, whereby the anti-siphon disks will seal the open end of said chamber in response to the application of negative pressure at the inlet of said chamber.
Claim 5
Dependent Claim
205 words
A water control valve for the water tank of a toilet bowl, comprising, in addition to the water tank, an open-ended chamber having a circular cross-section positioned for admitting pressurized water at an inlet at the base of the chamber, a plunger movable along the axis of the chamber and seatable on said inlet to close the Valve, means for moving the plunger upwardly along its axis to open said inlet when water is to be fed through said chamber and into said water tank, a plurality of flexible contiguous anti-siphon disks mounted on said plunger near the upper end thereof, a housing enclosing said valve and having at or near the upper end thereof a plurality of first openings through which air may be received, and a canopy surmounted integrally on said housing having protective second openings each individually communicating respectively with said first openings to permit air to enter said chamber through said first openings in the housing and through the second openings in said canopy but to block the droppage of foreign matter into said chamber, whereby the anti-siphon disks will seal the open end of said chamber in response to the application of negative pressure at the inlet of said chamber.
Claim 6
Dependent Claim
40 words
A water control valve according to claim 3 in which the anti-siphon disks have an area exceeding the area of the open end of the chamber and exceeding also the area embracing all of the first openings in the housing.
Claim 7
Dependent Claim
81 words
A water control valve according to claim 4, including means responsive to the droppage of the water level within the tank to a predetermined height to raise said plunger to allow water to enter said chamber via its inlet, and means responsive to a droppage of the pressure at said inlet to a predetermined value to move said anti-siphon disks down to the open end of the chamber to block the reverse flow of water from said tank into said inlet.
Claim 8
Dependent Claim
37 words
A water control valve according to clam 5, including a supplementary opening at or near the upper end of the housing, and means to block the droppage of foreign matter into said chamber through said supplementary opening.
Claim 9
Dependent Claim
37 words
A water control valve according to clam 5, including a supplementary opening at or near the upper end of the housing, and means to block the droppage of foreign matter into said chamber through said supplementary opening.
Claim 10
Dependent Claim
182 words
A water control valve for the water tank of a toilet bowl comprising an open-ended chamber having a circular cross-section, a plunger movable along the axis of said chamber in one direction to open said valve to allow water to be supplied from an inlet to said valve and in the opposite direction to close said valve, a housing enclosing said chamber and said plunger, anti-siphon protective apparatus for said valve, said apparatus including a plurality of first air openings in the roof, a canopy surmounted over the first air openings in the roof, said canopy having additional second air openings each individually communicating respectively with said first air openings through which air may be received into said housing, and a plurality of flexible contiguous disks mounted on said plunger above the open end of the chamber, said disks being movable in response to the opening of said valve to close all of the openings in the roof of said housing and being movable in response to the application of suction to said chamber to seal the open end of said chamber.
Claim 11
Dependent Claim
182 words
A water control valve for the water tank of a toilet bowl comprising an open-ended chamber having a circular cross-section, a plunger movable along the axis of said chamber in one direction to open said valve to allow water to be supplied from an inlet to said valve and in the opposite direction to close said valve, a housing enclosing said chamber and said plunger, anti-siphon protective apparatus for said valve, said apparatus including a plurality of first air openings in the roof, a canopy surmounted over the first air openings in the roof, said canopy having additional second air openings each individually communicating respectively with said first air openings through which air may be received into said housing, and a plurality of flexible contiguous disks mounted on said plunger above the open end of the chamber, said disks being movable in response to the opening of said valve to close all of the openings in the roof of said housing and being movable in response to the application of suction to said chamber to seal the open end of said chamber.
Claim 12
Dependent Claim
51 words
A water control valve according to claim 7 in which the flexible disks have an area which covers all of said first openings in the roof of the housing in the upper position of the plunger and covers the open end of the chamber in the lower position of the plunger.
Claim 13
Dependent Claim
65 words
A water control valve according to claim 8 in which the area of said flexible contiguous disks is so large that, in response to a negative pressure within the chamber, the peripheral regions of said disks will be promptly turned down to seal the open end of the chamber and prevent the reverse flow of water from said chamber back into the water supply inlet.
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |