US2270910A - Water control for closet tanks - Google Patents

Water control for closet tanks Download PDF

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Publication number
US2270910A
US2270910A US313810A US31381040A US2270910A US 2270910 A US2270910 A US 2270910A US 313810 A US313810 A US 313810A US 31381040 A US31381040 A US 31381040A US 2270910 A US2270910 A US 2270910A
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Prior art keywords
plunger
cap
water
washer
valve
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US313810A
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Svirsky Bennett
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SANS Inc
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SANS Inc
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00Means in valves for absorbing fluid energy, e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member
    • F16K47/04Means in valves for absorbing fluid energy, e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F16K47/06Means in valves for absorbing fluid energy, e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member for decreasing pressure or noise level, the throttle being incorporated in the closure member with a throttle in the form of a helical channel
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02Plumbing installations for fresh water
    • E03C1/10Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/3149Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • Y10T137/3185Air vent in liquid flow line
    • Y10T137/3294Valved
    • Y10T137/3331With co-acting valve in liquid flow path
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7287Liquid level responsive or maintaining systems
    • Y10T137/7358By float controlled valve
    • Y10T137/7439Float arm operated valve
    • Y10T137/7462With refill pipe
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7287Liquid level responsive or maintaining systems
    • Y10T137/7358By float controlled valve
    • Y10T137/7439Float arm operated valve
    • Y10T137/7465Assembly mounted on and having reciprocating valve element coaxial with inlet pipe
    • Y10T137/7472Vertical inlet riser
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7287Liquid level responsive or maintaining systems
    • Y10T137/7358By float controlled valve
    • Y10T137/7439Float arm operated valve
    • Y10T137/7475With toggle or second lever connected to valve
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7287Liquid level responsive or maintaining systems
    • Y10T137/7358By float controlled valve
    • Y10T137/7439Float arm operated valve
    • Y10T137/7478With interposed cam, gear or threaded connection

Description

Jan. 27, 1942. B. SVIRSKY WAT ER CONTROL FOR CLOSET TANKS Filed Jan. 15, 1940 F gn sgg w I my Patented Jan. 27, 1942 2,270,910 WATER; CONTROL FOR CLOSET TANKS Bennett Svirsky, Glendale,
root and mesne rated Calii'., assignor, by ai-j cuts. to Sans Incorpoa corporation of California Application January 15, 1940, Serial No. 313,810
9 Claims.
My invention relates to improvements in a water control for closets, particularly of the low tank type.
More specifically, the invention pertains to improvements in a water control relating to that part of the closet tank which is known in the trade as a ball-cock.
Among the more important objects of the invention is to improve upon the float valve mechanism of the ball-cock whereby a more effective silenc ng of the flowing water is accomplished; to improve upon the mechanism of the ball-cock whereby a simpler and easier functioning antisyphoning means is provided; to improve upon the lift lever assembly whereby a wider range in water pressure systems is accommodated, thereby eliminating the use of water regulators; to provide as an article of manufacture an improved plunger adapted to be sold in the trade with sink faucets and the like for breaking up the water and acting as a silencer; and to provide in a ball-cock an improved one piece casting extending from the bottom of the tank to the bottom of the syphon breaker.
Still other objects, features, and advantages of invention will hereinafter appear.
Referring to the drawing wherein is shown a preferred embodiment of the invention as now reduced to practice.
Fig. 1 is a side elevation of the improved ballcock assembly shown positioned in a closet tank and associated with a conventional flush valve,
the tank being shown in section and containing a body of water, the rise and fall of which opens or closes the stop-cock of the assembly.
Fig. 2 is an enlarged vertical mid-section showing the device per se withthe parts in closed position like that in Fig, 1, a portion of the structure being broken away to shorten the view. Some elements of the device are shown in side elevation and a floor portion of the closet tank is included in the view.
Fig. 3 is a section-similar to that shown in Fig. 2, but with the movable parts in functioning position.
Fig. 4 is a section taken on line 4-4 of Fig, 1.
Referring in detail to the drawing and to the figures as a whole, the water control comprises in general a ball-cock assembly 4, including the float rod 5, the float B for actuating the float valve 1 of the ball-cock, and a re-fill tube 8 associated with the over-flow pipe 9 of the flush valve I 0.
The ball-cock 4 and the flush valve ID in Fig. 1 are shown mounted and operatively positioned in the closet tank I l. The ball-cock is connected to a source of water supply l2 through the medium of the shut-ofl valve l3, the supply pipe l4, and the combined conventional couplingnut and washer connection l5. There is also provided a cone washer l6 and lock nut II for joining the ball-cock in a leaf proof manner with the fioor portion I If of the tank.
The numeral 18 indicates the tubular body portion of the ball-cock which is shown as a one piece casting which extends from beneath the floor of the tank to the cap structure I9 wherein the breaking up of the water and the anti-syphoning mechanism is housed. The upper portion of the casting is externally threaded at 20 whereby to screw the cap structure I 9 thereon. The purpose of this detachability will be explained later on.
Adjacent the lower threaded end 2|, the casting is provided with an annular flange 22 which has a bottom flat face 23 against which the washer is wedged when the lock nut I1 is tightened, thus compressing the washer to make a leakproof joint with the floor of the tank.
At apoint 24 in a downwardly spaced relation to the mouth or upper end of the casting 18 there is provided an internal screw-threaded portion l8s whereinto is screwed one end of the valve seat 25. Said seat is provided with an internal bore 26 concentric with the axis of the casting. The body portion 21 of the valve seat adjacent the threads is reduced in size and constructed of a polygonal shape to provide for the application of a socket wrench thereover whereby to render the valve seat detachable.
Adjacent the portion 21 the valve seat is further reduced to a cylindrical shape 28 and the end rounded off to provide a valve seat 29 for the plunger or float valve 1 presently to be'described.
The upper end of the casting is internally machined to provide a working surface along which the plunger 1 travels when it is elevated from time to time. The plunger is of an inverted cup shape to provide within it a chamber 3|, and in said chamber is mounted a washer 32 which normally rests on the seat 29. and at such time a considerable portion of the valve seat extends into the chamber 3| as shown in Fig. 3.
The plunger is provided with a stem 33, and on the stem is slidably mounted the anti-syphon, anti-splash washer 34. The external peripheral wall of the plunger is spiral grooves 35 and. 35a through which the water passes from the casting to the tank.
The function of the grooves is to divide the provided with a pair ofequallyas well to break up the water and silence On the upper end of the casting I screw the cap structure l9. Said structure has a cylindrical portion 45 which is threaded at 4| to mate with the thread 20, and when the casting and cap are fully attached the end of the casting forms a seat 42 whereon the washer 34 rests when the ball-cock is not functioning.
The cylindrical part 40 is provided with a closure 43 which is provided with a hole 44 concentric with the axis of the casting through which the stem 33 operates.
The stem 33 abuts against the lower side of one of a pair of tandem contacting levers 45 and 45, the closure part 43 being provided with a bifurcation 41 wherebetween to pivot the lever 45 by means of the cotter pin 48.
Arranged circumferentially in the cylindrical part 4|) adjacent the closure 43 are a plurality of radially extending, anti-syphon holes 43.
To the part 40 I attach as an integral part the spout 50, provided with the passage 5|. The outlet end portion of said passages is internally screw-threaded and therein is screwed the tank fill pipe 52. n the spout 55 I provide an upward extension 53 which is bifurcated at 54 and in the bifurcation I mount the lever 45 by means of the cotter pin 55. A stop 55 1s provided on said extension whereagainst the lever 45 rests when the tank H is empty. The lever 45 is threaded at 51, and the float rod has one end screwed thereinto, while to the opposite end is affixed the float 5.
The washer 34 is provided with a sleeve portion 34s, and this sleeve is slidable on the stem 33, together with its downwardly fiaredportion 34].
Said washer is cupped in order that the water egressing from the groove 35, 35a will travel first along its cupped face thereby exerting a lifting action avoiding any tending of the washer to tilt, which would promote friction between the sleeve and stem.
An annular stop ledge 55 is provided in the inner wall of the cylinder 40 to limit the upward thrust of the washer by the inflowing water at a point adjacent where the opening 5| enters the discharge chamber 59 as shown in Fig. 2. Thus, no air entering the holes 49 is entrapped within the pipe 52, and when the tank has filled. the washer gravitates to seating position, thereby permitting air to enter holes 48 and eliminate any tendency of the water in the tank to be syphoned back into the main supply line.
In order to compensate for variations in water pressures extending over a. wide range, I pro- .vide the compound leverage system as shown,
whereby suflicient force is attained by the action vof the water against the float to at all times actuate the plunger to a seating position upon the valves mouth 29.
The lever 45 has its pivoted end extended at 50 so as to detachably engage with the free end 5| of the lever 45. The lever 45 has a lower cam face 520. which engages the upper end of the stem 33 to exert a powerful downward pressure thereagainst under the urgeof the nose portion of the lever 45.
As the float 5 is elevated, the nose end 55 depresses the free end portion 5| of the lever 45 to force the plunger downwardly with added force to the position shown in Fig. 2.
The pipe 52 has its terminal end 52 somewhat flattened and beveled in order to direct the flattened stream which issues therefrom against the casting, or valve casing, l8 in a flatwise manner, to produce an additional initial silencing effect. This flattened pipe end also causes the water pressure to build up in the pipe so as to assure a slight overflow feed into the refill pipe 8 to provide for water in the bowl trap in case it has all been sucked out when the bowl is flushed. Y
A description of the operation will now be set forth.
In Fig. 3 the parts are shown in the relation they assume when the tank II has been emptied by operating the flush valve l0 in the usual manner.
In Figs. 1 and 2, the parts are shown in the relation they assume when the tank has been filled.
When the flush valve is operated, the float 5 follows the fall of the water until the lever 45 comes to rest against the stop 55. As the float gradually falls the lever 45 moves about its pivotal joint 55 in a clock-wise direction thereby elevating its nose end. Due to the freedom of pressure of the nose against the free end 5| of the lever 45, the pressure of the water in the casting, or valve casing l8 acts against the plunger I and in turn causes the stem 33 to move upwardly, thereby maintaining the contacting association of numbered parts 55 and 5|.
As soon as the washer 32 is elevated from its seat 29, water flows through'the grooves 35 and 35a and is broken up and silenced by them. On egressing under the washer 34 the water elevates the washer from the position shown in Fig. 2 to that shown in Fig. 3, said washer being guided in its upward movement by the sleeve 348 until its peripheral edge contacts with the annular stop flange 58, thereby permitting the water to flow through the spout openingv 5| and through the tank fill tube 52 into the tank. While the tank is filling, water is backed up in the pipe 52 due to its flattened mouth and a sub-flow is created through the 'reflll'tube 8 into the overflow pipe 9 for the purpose hereinbefore stated. The washer 34 also prevents the water from being splashed through the anti-syphon holes 49 and further aids in directing the water into the spout opening.
As the float gradually rises due to the rise of the water in the tank, the nose end of the lever 45 acts on the free end of the lever 45 to depress it, thereby gradually forcing the stem of the plunger downwardly until the washer 32 is fully seated and stops the flow of water. As soon I as the latter operation takes place, the washer 34 due to its weight and free working fit gravi-.
tates to rest against its seat 42, permitting air to enter the holes 49 and thereby preventing. any tendency. of the water to be syphoned from the tank into the main line whereby it mightbecome polluted.
By the peculiar construction of the lever mechanism I am able to control a much wider range of water pressure than is at present accomplishable without the use of auxiliary water pressure controls.
When it is necessary to make repairs, such as 'an-ti-syphon holes in the cotter pin 55 is removed preparatory to detaching the lever 46, and the cap alone is unscrewed, the other parts remaining in place. After the cap has been removed the plunger and washer may be lifted out and if necessary a socket wrench applied to the valve seatfor its removal. Thus, no lateral stress is placed on the joint connection of the ball-cock with the bottom of the tank whereby its leak-proof condition might become impaired.
It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the subject matter claimed.
What I claim is:
1. A ball-cock comprising a valve casing, a valve body, provided with an inlet and a seat at the end of the inlet, mounted in said casing, there being a plunger space in said casing and a plunger provided with a stem, said plunger being slidable in said plunger space, and normally closing said inlet, said plunger having divided passages in its external face extending from top to bottom thereof for dividing water issuing from said inlet therethrough into streams, a cap structure screwed onto said casing, said cap structure having a discharge chamber in vertically spaced relation to said plunger space, said plunger stem extending through said chamber and thence through a hole in said cap, a spout attached to said cap structure, there being a plurality of wall of said chamber, and said spout having a passage-way which communicates with said chamber subjacent to said anti-syphoning holes, and a washer slidably mounted upon said stem, and movable by said streams of water from rest position below the passageway of said spout to a position on said stem wherein communication is closed between said anti-syphon holes and said spout.
2. A ball-cock comprising a tubular casing, a valve body provided with a member having a passage-way mounted in said casing, there being a plunger space between said valve body and the end of said casing, a plunger slidably mounted in said plunger space and normally closing said passage-way, said plunger having a double spiral groove in its external face extending from end to end thereof, a cap structure fastened to said tubular casing, said cap structure having a tubular chamber concentric with said plunger space, said cap having a plurality of radially extending antisyphon holes in the wall of said chamber adjacent the caps otherwise closed end, a spout for said cap, said spout having a passage-way communicating with said tubular chamber subjacent said anti-Syphon holes, said plunger having a stem extending axially through said tubular chamber and having an outer end por ion p jecting through a hole in the closed end of said cap, and a washer slidably mounted on said stem to open and close communication between sa d anti-syphon holes and the p y 0f Sald spout.
3. A ball-cock comprising a tubular cas n an elongated valve body mounted in said casmg i having through it a passage. which extends 1 the direction of its length, said body being furish'ed 'at one end with a valve seat, there bemg a plunger space between said valve bo y and the end of said casin a Plunger slldably in Said plunger space and having a valve portion to cooperate with said valve seat, said plunger said passage-way of having restricted fluid passage means leading through it from end to end, a tubular cap structure fastened to said tubular casing and providing an axial extension of the chamber thereof, said plunger having a stem extending axially through said chamber extension and having an outer end portion projecting through a hole in the closed end of said cap, a lever having one end pivoted to said cap and its adjacent portion resting in a detached manner upon the projecting end of said stem, there being anti-siphon holes in said cap subjacent to its closed end and an outlet subjacent'to said holes, and a washer slidably mounted on said stem to open and close communication between said outlet and anti-siphon holes.
4- The subject matter of claim 3, and said washer having a sleeve portion fitted to said stem and a downwardly directed flared portion, the periphery of which engages the wall of the chamber of said cap structure and is movable from a position below to a position above said outlet.
5. The subject matter of claim 3 and, an annular flange in said cap structure against which the peripheral edge of said washer is abuttable.
6. The subject matter of claim 3 and, stop means in said cap structure to limit the upward travel of said washer on saidstem.
7. A ball-cock comprising a tubular casing, an elongated valve body mounted in said casing and having through it a passage which extends in the direction of its length, said body, being furnished at one end with a valve seat, there being a plunger space between said valve body and the end of said casing, a plunger slidably mounted in said plunger space and having a valve portion to cooperate with said valve seat,
said plunger having fluid passage means leading through it from end to end, a tubular cap structure fastened to said tubular casing and provid ing an axial extension of the chamber thereof, said plunger having a stem extending axially through said chamber extension and having an outer end portion projecting through a hole in the closed end of said cap, there being an opening in said cap subjacent to its closed end and an outlet subjacent to said opening, and a washer slidably mounted on said stem to open and close communication between said outlet and said opening.
8. A ball-cock comprising a tubular casing, a valve body provided with a member having a passage-way mounted in said casing, there being a plunger space between said valve body and the end of said casing, a plunger slidably mounted in said plunger space and normally closing said passage-Way, said plunger having a groove in its external face extending from end to end thereof, a cap structure fastened to said tubular casing, said cap structure having a tubular chamber concentric with said plunger space, said cap structure having anti-syphon holes in the wall of said chamber adjacent the caps structure otherwise closed end, a spout for said cap structure, said spout having a passage-way communicating with said tubular chamber s bjacent said anti-Syphon holes, said plunger hsving a stem extending axially through said tubular chamber and having an outer end portion projecting through a hole in the closed end of said cap, and a washer slidably mounted on said stem to open and close communication between said antisyphon holes and the passage-way of said spout.
9. A ball-cock comprising a valve casing, a
valve body provided with an inlet and a seat at the end of said inlet mounted in said casin there being a plunger space in said casing and a plunger provided with a stem, said plunger being'slidable in said plunger space and normally closing said inlet, said plunger having a passage extending from top to bottom thereof, a cap structure screwed onto said casing, said cap structure having a discharge chamber in vertically spaced relation to said plunger space, said plunger stem extending through said cham-
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426782A (en) * 1944-11-25 1947-09-02 Mazzeo Rocco Float-valve assemblage
US2604113A (en) * 1946-02-16 1952-07-22 Barcy Mfg Company Valve
US2609830A (en) * 1948-11-23 1952-09-09 Mansfield Sanitary Pottery Inc Flush tank inlet valve
US2619123A (en) * 1947-11-07 1952-11-25 Shenandoah Equipment Company Poultry fountain water valve
US2635622A (en) * 1947-08-11 1953-04-21 Jesse C Owens Antisiphonic ball cock
US2664913A (en) * 1949-06-30 1954-01-05 Wilbert H Patten Nonsiphoning ball cock
US2667177A (en) * 1948-11-23 1954-01-26 Mansfield Sanitary Pottery Inc Flush tank valve with vacuum breaker
US2684830A (en) * 1949-03-01 1954-07-27 Albert R Stephany Silent ball cock
US2706998A (en) * 1950-10-27 1955-04-26 Ralph E Bletcher Ball cock
US2730122A (en) * 1951-12-24 1956-01-10 Free Gold Entpr Inc Water control for closet tanks
US2734524A (en) * 1956-02-14 Liquid tank
US2762059A (en) * 1952-05-12 1956-09-11 Leroy B Jahn Water closet flushing mechanism
US2971525A (en) * 1959-01-05 1961-02-14 Jr Armand E Antunez Float-operated valve
US3106935A (en) * 1961-04-20 1963-10-15 Gatzke Edward Automatic vacuum breaking sill cock
US4901753A (en) * 1989-03-07 1990-02-20 Barker Bernard A Float assembly valve
US6076546A (en) * 1998-03-16 2000-06-20 Waters; Michael Overflow protection valve assembly
US20060191573A1 (en) * 2003-05-16 2006-08-31 Mauri Salmisuo Sanitizable float valve
US20070006923A1 (en) * 2003-09-26 2007-01-11 Smith John W Adjustable inlet valve with air gap
CN101706014B (en) * 2009-11-10 2011-08-10 吴江天龙电子机械设备有限公司 Explosion-proof breather drain valve

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734524A (en) * 1956-02-14 Liquid tank
US2426782A (en) * 1944-11-25 1947-09-02 Mazzeo Rocco Float-valve assemblage
US2604113A (en) * 1946-02-16 1952-07-22 Barcy Mfg Company Valve
US2635622A (en) * 1947-08-11 1953-04-21 Jesse C Owens Antisiphonic ball cock
US2619123A (en) * 1947-11-07 1952-11-25 Shenandoah Equipment Company Poultry fountain water valve
US2609830A (en) * 1948-11-23 1952-09-09 Mansfield Sanitary Pottery Inc Flush tank inlet valve
US2667177A (en) * 1948-11-23 1954-01-26 Mansfield Sanitary Pottery Inc Flush tank valve with vacuum breaker
US2684830A (en) * 1949-03-01 1954-07-27 Albert R Stephany Silent ball cock
US2664913A (en) * 1949-06-30 1954-01-05 Wilbert H Patten Nonsiphoning ball cock
US2706998A (en) * 1950-10-27 1955-04-26 Ralph E Bletcher Ball cock
US2730122A (en) * 1951-12-24 1956-01-10 Free Gold Entpr Inc Water control for closet tanks
US2762059A (en) * 1952-05-12 1956-09-11 Leroy B Jahn Water closet flushing mechanism
US2971525A (en) * 1959-01-05 1961-02-14 Jr Armand E Antunez Float-operated valve
US3106935A (en) * 1961-04-20 1963-10-15 Gatzke Edward Automatic vacuum breaking sill cock
US4901753A (en) * 1989-03-07 1990-02-20 Barker Bernard A Float assembly valve
US6076546A (en) * 1998-03-16 2000-06-20 Waters; Michael Overflow protection valve assembly
US20060191573A1 (en) * 2003-05-16 2006-08-31 Mauri Salmisuo Sanitizable float valve
US20070006923A1 (en) * 2003-09-26 2007-01-11 Smith John W Adjustable inlet valve with air gap
CN101706014B (en) * 2009-11-10 2011-08-10 吴江天龙电子机械设备有限公司 Explosion-proof breather drain valve

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