EP1724402A1 - Self-sealing floor drainage - Google Patents
Self-sealing floor drainage Download PDFInfo
- Publication number
- EP1724402A1 EP1724402A1 EP04802588A EP04802588A EP1724402A1 EP 1724402 A1 EP1724402 A1 EP 1724402A1 EP 04802588 A EP04802588 A EP 04802588A EP 04802588 A EP04802588 A EP 04802588A EP 1724402 A1 EP1724402 A1 EP 1724402A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drain
- sealing
- self
- floor drain
- torsion spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/28—Odour seals
- E03C1/298—Odour seals consisting only of non-return valve
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0407—Floor drains for indoor use
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F2005/0416—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps with an odour seal
- E03F2005/0417—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps with an odour seal in the form of a valve
Definitions
- the present invention relates to an interface for connecting an indoor floor to a draining system, and more particularly to a self-sealing floor drain for draining waste water smoothly and preventing sewage in a drain pipe from flowing back into indoor floor.
- a floor drain is an important interface for connecting an indoor floor to a draining system.
- One of the conventional floor drains is a so-called bell-type floor drain, which generally includes an inverted bell-shaped drain basket and a strainer.
- the drain basket of the conventional bell-type floor drain is easily removable from the floor, and might by moved upward by a positive pressure in a drain pipe system to destroy a water sealing effect of the floor drain, resulting in the invasion of bad smell, hazardous gas, insects, and sewage from the drain pipe into a room via the floor drain.
- self-sealing floor drains have been developed and received wide acceptance. Fig.
- the device is a switch unit employing reverse water energy to achieve upward and downward movements thereof.
- This switch unit includes a unique piston-like structure to effectively solve the self-sealing problem in the conventional floor drains.
- this switch unit also includes a weight, which offsets the opening size of the switch unit under water pressure.
- the switch unit since the switch unit is located at a center of the floor drain, it blocks a path via which waste water is drained when the switch unit is moved upward, and inevitably lowers the draining speed. When the amount of waste water is large, part of the waste water fails to pass through the floor drain into the drain pipe and overflows the floor drain.
- the switch unit is driven to move upward and downward via meshed gears and rack, and therefore involves in complicate structure and high manufacturing cost.
- the weight and the switch unit of the floor drain are mounted on a centered slide rod in the drain basket. Large amount of waste water flows along the centered slide rod and permeates into the weight and the switch unit, resulting in a switch unit working in an environment containing waste water and thereby failing to work normally. That is, the device disclosed in Chinese Patent No. 99801762.0 limits the function of a floor drain and makes the floor drain unstable in performance.
- a primary object of the present invention is to provide a self-sealing floor drain to eliminate the drawbacks of unsmooth draining, complicate structure, high manufacturing cost, and unstable function existed in the conventional floor drains.
- the self-sealing floor drain according to the present invention includes a hollow cylindrical drain basket mounted in a drain pipe or an existing bell-type floor drain, and a sealing disc movably mounted at a water outlet of the drain basket.
- the drain basket has a case, on an inner wall surface of which a switch unit is mounted. And, a torsion spring is provided in the switch unit for opening and closing the sealing disc.
- the self-sealing floor drain of the present invention has reasonable and simple structure to enable lowered manufacturing cost, as well as convenient, stable, and safe use thereof to allow smooth draining of waste water.
- the self-sealing floor drain provided by the present invention may be independently mounted to a drain pipe or be used with an existing bell-type floor drain.
- the self-sealing floor drain is used with an existing bell-type floor drain.
- the self-sealing floor drain according to the present invention includes a drain basket 1, a connecting interface 2, and a sealing member 3.
- the drain basket 1 may be mounted to a drain pipe or be used with an existing bell-type floor drain.
- the connecting interface 2 is externally mounted around the drain basket 1 for directly connecting to the drain pipe or to the bell-type floor drain.
- the sealing member 3 is mounted around an outer side of the connecting interface 2 to provide a sealing effect between the connecting interface 2 and an inner wall surface of the existing bell-type floor drain or the drain pipe.
- the drain basket 1 includes a case 11, a switch unit 12, and a sealing disc 13.
- the case 11 is a hollow cylinder having a radially outward flange 111 integrally formed around a top water inlet thereof.
- the case 11 is formed at a bottom with a water outlet.
- a sealed section 112 is downward extended from a position slightly higher than the water outlet to a slightly radially inward projected position.
- the sealed section 112 has curved upper and lower surfaces.
- the case 11 is provided on an inner sidewall surface 114 with an axially extended shallow recess with two opposite slide grooves 113.
- the shallow recess may be formed at any place on the inner sidewall surface 114 of the case 11.
- the two slide grooves 113 have a triangular cross section. However, the slide grooves 113 may also be any other geometrical cross section.
- the switch unit 12 is a hollow body having a trapezoid vertical section and a substantially oblong cross section.
- the switch unit 12 has a top surface 121 and a left end wall surface 122, both of them have a curved cross section to prevent impurities and wastes, such as hair, in waste water from being accumulated or trapped thereat to block water flown into the floor drain.
- the switch unit 12 also has an open right end 124 and two sidewalls 125. Each of the two sidewalls 125 is integrally provided along an end adjacent to the open right end 124 with an outward protruded edge 126, which has a cross section and size identical to that of the slide groove 113 on the case 11.
- the protruded edges 126 have a triangular cross section.
- the switch unit 12 is installed in the case 11 by inserting the protruded edges 126 into the slide grooves 113, so that the protruded edges 126 and the slide grooves 113 are engaged with one another in the manner of tight fitting.
- End surfaces of the sidewalls 125 and the protruded edges 126 of the switch unit 12 in contact with the case 11 also have a curved cross section corresponding to the curved inner sidewall surface 114 of the case 11, so that the switch unit 12 may be tight fitted to the case 11.
- the switch unit 12 may be tightly mounted to the case 11 via engagement of the protruded edges 126 with the slide grooves 113, and axially slidable along the slide grooves 113.
- the switch unit 12 includes a bottom surface 123, on which a through hole 127 is formed.
- the bottom surface 123 is integrally formed on an upper side thereof with a vertically extended curved wall 128, which is concentric with the through hole 127 and has an inner diameter the same as a diameter of the through hole 127.
- the curved wall 128 together with the curved left end wall 122 of the switch unit 12 define an internal hollow guide pipe 138, which is concentric with the through hole 127 and has an inner diameter the same as the diameter of the through hole 127.
- the hollow guide pipe 138 may be directly integrally formed on the bottom surface 123.
- a cylindrical torsion spring pull rod 129 is provided in the hollow guide pipe 138.
- the torsion spring pull rod 129 is provided on an outer wall surface with an axially extended groove 130 of any geometrical cross section.
- the groove 130 has a triangular cross section.
- the hollow guide pipe 138 is provided on an inner wall surface with an axially extended rib 131 having a cross section corresponding to the groove 130.
- the torsion spring pull rod 129 is mounted in the hollow guide pipe 138 by aligning and engaging the groove 130 with the rib 131, such that the torsion spring pull rod 129 is guided by the rib 131 to slide in the hollow guide pipe 138 only in an axial direction.
- a stopper 132 is provided near an upper end of the torsion spring pull rod 129 to limit a distance by which the torsion spring pull rod 129 can be moved downward in the hollow guide pipe 138.
- the torsion spring pull rod 129 is provided at a lower end surface with an internally threaded hole 133, and at an upper end surface with a hole 139 for a bar 140 to insert therein.
- a spring holding ring 134 is connected to a top of the bar 140.
- the bar 140 may be integrally formed with or additionally screwed to the torsion spring pull rod 129.
- the hollow guide pipe 138 is also integrally formed on the outer wall surface with a spring seat 135, on a top center of which a dent is provided.
- a torsion spring 136 is mounted in the switch unit 12 with two ends separately movably connected to the spring holding ring 134 on the bar 140 and the dent on the spring seat 135.
- the sealing disc 13 is located at the bottom of the case 11 below the sealed section 112.
- the sealing disc 13 has an annular lower end surface flush with the bottom of the case 11, and has a curved peripheral surface matching with the curved lower surface of the sealed section 112.
- the curved peripheral surface of the sealing disc 13 effectively prevents impurities and wastes in the waste water from staying around the sealing disc 13 to adversely affect a sealed condition at a joint 137 between the sealing disc 13 and the sealed section 112.
- the sealing disc 13 is provided with a through hole, which is aligned with the threaded hole 133 on the lower end surface of the torsion spring pull rod 129 when the switch unit 12 is mounted in the case 11.
- a screw is extended through the through hole on the sealing disc 13 into the threaded hole 133 to fixedly connect the sealing disc 13 to the torsion spring pull rod 129.
- the connecting interface 2 is a hollow cylindrical member externally mounted around an upper part of the case 11 of the drain basket 1, so as to connect the drain basket 1 to the drain pipe or the existing bell-type floor drain.
- a first sealing ring 5 is mounted between the flange 111 of the case 11 and the connecting interface 2.
- the sealing member 3 is an annular member externally mounted around the connecting interface 2. A contact surface between the connecting interface 2 and the sealing member 3 is sealed by an L-shaped second sealing ring 6.
- the second sealing ring 6 may be other suitable shape.
- the sealing member 3 is formed along an outer circumferential surface with a semi-circular recess 31, in which an O-ring 8 is mounted. With the sealing member 3, a good sealing effect is produced at the joint of the drain basket 1 and an inner wall surface of the drain pipe or the existing bell-type floor drain.
- waste water flown into the drain basket 1 applies a downward force on the sealing disc 13.
- the torsion spring pull rod 129 is caused to move downward and open the joint 137, allowing the waste water to flow into the drain pipe via the opened joint 137.
- the torsion spring 136 brings the pull rod 129 upward, and the sealing disc 13 is caused to move upward and seal the joint 137 again, so that sewage, bad smell, hazardous gas, and insects are stopped from entering into a room via the floor drain due to a positive pressure state in the drain pipe.
- the switch unit 12 in the present invention is mounted to one side of the drain basket 1.
- a hindrance from the switch unit 12 of the present invention to the waste water flowing through the drain basket 1 is minimized, preventing an overflowed floor drain when there is a large amount of waste water.
- the present invention eliminates the problem of hair and other impurities held to the switch unit.
- the switch unit 12 of the present invention also has simple structure and reduced components to enable convenient, stable, and safe use thereof.
Abstract
A self-sealing floor drain includes a hollow cylindrical drain basket mounted in a drain pipe or an existing bell-type floor drain, and a sealing disc movably mounted at a water outlet of the drain basket. The drain basket has a case, on an inner wall surface of which a switch unit is mounted. A torsion spring is provided in the switch unit for opening and closing the sealing disc. Waste water flown into the drain basket applies a downward force on the sealing disc to thereby open a bottom sealing joint of the drain basket to drain the waste water. When the waste water has been drained, the torsion spring brings the sealing disc upward to seal the sealing joint again, so that sewage, bad smell, hazardous gas, and insects are stopped from entering into a room via the floor drain due to a positive pressure state in the drain pipe.
Description
- The present invention relates to an interface for connecting an indoor floor to a draining system, and more particularly to a self-sealing floor drain for draining waste water smoothly and preventing sewage in a drain pipe from flowing back into indoor floor.
- It is known that a floor drain is an important interface for connecting an indoor floor to a draining system. One of the conventional floor drains is a so-called bell-type floor drain, which generally includes an inverted bell-shaped drain basket and a strainer. The drain basket of the conventional bell-type floor drain is easily removable from the floor, and might by moved upward by a positive pressure in a drain pipe system to destroy a water sealing effect of the floor drain, resulting in the invasion of bad smell, hazardous gas, insects, and sewage from the drain pipe into a room via the floor drain. To prevent the bad smell, hazardous gas, insects, and sewage from entering into a room, self-sealing floor drains have been developed and received wide acceptance. Fig. 1 shows a device preventing sewage from flowing backward disclosed in
Chinese Patent No. 99801762.0 . As shown, the device is a switch unit employing reverse water energy to achieve upward and downward movements thereof. This switch unit includes a unique piston-like structure to effectively solve the self-sealing problem in the conventional floor drains. However, this switch unit also includes a weight, which offsets the opening size of the switch unit under water pressure. Moreover, since the switch unit is located at a center of the floor drain, it blocks a path via which waste water is drained when the switch unit is moved upward, and inevitably lowers the draining speed. When the amount of waste water is large, part of the waste water fails to pass through the floor drain into the drain pipe and overflows the floor drain. Further, the switch unit is driven to move upward and downward via meshed gears and rack, and therefore involves in complicate structure and high manufacturing cost. Moreover, the weight and the switch unit of the floor drain are mounted on a centered slide rod in the drain basket. Large amount of waste water flows along the centered slide rod and permeates into the weight and the switch unit, resulting in a switch unit working in an environment containing waste water and thereby failing to work normally. That is, the device disclosed inChinese Patent No. 99801762.0 limits the function of a floor drain and makes the floor drain unstable in performance. - A primary object of the present invention is to provide a self-sealing floor drain to eliminate the drawbacks of unsmooth draining, complicate structure, high manufacturing cost, and unstable function existed in the conventional floor drains.
- To achieve the above and other objects, the self-sealing floor drain according to the present invention includes a hollow cylindrical drain basket mounted in a drain pipe or an existing bell-type floor drain, and a sealing disc movably mounted at a water outlet of the drain basket. The drain basket has a case, on an inner wall surface of which a switch unit is mounted. And, a torsion spring is provided in the switch unit for opening and closing the sealing disc.
- The self-sealing floor drain of the present invention has reasonable and simple structure to enable lowered manufacturing cost, as well as convenient, stable, and safe use thereof to allow smooth draining of waste water.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
- Fig. 1 is a vertical sectional view of a conventional floor drain;
- Fig. 2 is a vertical sectional view showing the structure of a self-sealing floor drain according to a preferred embodiment of the present invention;
- Fig. 3 is a vertical sectional view of a case of the self-sealing floor drain of Fig. 2;
- Fig. 4 is a top view of Fig. 3;
- Fig. 5 is a vertical sectional view of a switch unit for the self-sealing floor drain of Fig. 2;
- Fig. 6 is top view of Fig. 5;
- Fig. 7 is a vertical sectional view of a torsion spring pull rod for the self-sealing floor drain of Fig. 2; and
- Fig. 8 is a top view of Fig. 7.
- Please refer to Figs. 2 to 8, in which a self-sealing floor drain according to a preferred embodiment of the present invention is shown. The self-sealing floor drain provided by the present invention may be independently mounted to a drain pipe or be used with an existing bell-type floor drain. In the illustrated embodiment, the self-sealing floor drain is used with an existing bell-type floor drain. As shown in Fig. 2, the self-sealing floor drain according to the present invention includes a drain basket 1, a connecting
interface 2, and asealing member 3. The drain basket 1 may be mounted to a drain pipe or be used with an existing bell-type floor drain. The connectinginterface 2 is externally mounted around the drain basket 1 for directly connecting to the drain pipe or to the bell-type floor drain. The sealingmember 3 is mounted around an outer side of the connectinginterface 2 to provide a sealing effect between the connectinginterface 2 and an inner wall surface of the existing bell-type floor drain or the drain pipe. - The drain basket 1 includes a
case 11, aswitch unit 12, and asealing disc 13. - As shown in Figs. 3 and 4, the
case 11 is a hollow cylinder having a radiallyoutward flange 111 integrally formed around a top water inlet thereof. Thecase 11 is formed at a bottom with a water outlet. A sealedsection 112 is downward extended from a position slightly higher than the water outlet to a slightly radially inward projected position. The sealedsection 112 has curved upper and lower surfaces. Thecase 11 is provided on aninner sidewall surface 114 with an axially extended shallow recess with twoopposite slide grooves 113. The shallow recess may be formed at any place on theinner sidewall surface 114 of thecase 11. The twoslide grooves 113 have a triangular cross section. However, theslide grooves 113 may also be any other geometrical cross section. - As can be seen from Figs. 5 and 6, the
switch unit 12 is a hollow body having a trapezoid vertical section and a substantially oblong cross section. Theswitch unit 12 has atop surface 121 and a leftend wall surface 122, both of them have a curved cross section to prevent impurities and wastes, such as hair, in waste water from being accumulated or trapped thereat to block water flown into the floor drain. Theswitch unit 12 also has an openright end 124 and twosidewalls 125. Each of the twosidewalls 125 is integrally provided along an end adjacent to the openright end 124 with an outwardprotruded edge 126, which has a cross section and size identical to that of theslide groove 113 on thecase 11. In the illustrated embodiment, theprotruded edges 126 have a triangular cross section. Theswitch unit 12 is installed in thecase 11 by inserting theprotruded edges 126 into theslide grooves 113, so that theprotruded edges 126 and theslide grooves 113 are engaged with one another in the manner of tight fitting. End surfaces of thesidewalls 125 and theprotruded edges 126 of theswitch unit 12 in contact with thecase 11 also have a curved cross section corresponding to the curvedinner sidewall surface 114 of thecase 11, so that theswitch unit 12 may be tight fitted to thecase 11. Therefore, theswitch unit 12 may be tightly mounted to thecase 11 via engagement of theprotruded edges 126 with theslide grooves 113, and axially slidable along theslide grooves 113. Theswitch unit 12 includes abottom surface 123, on which athrough hole 127 is formed. Thebottom surface 123 is integrally formed on an upper side thereof with a vertically extendedcurved wall 128, which is concentric with the throughhole 127 and has an inner diameter the same as a diameter of the throughhole 127. Thecurved wall 128 together with the curvedleft end wall 122 of theswitch unit 12 define an internalhollow guide pipe 138, which is concentric with the throughhole 127 and has an inner diameter the same as the diameter of the throughhole 127. Alternatively, thehollow guide pipe 138 may be directly integrally formed on thebottom surface 123. - A cylindrical torsion
spring pull rod 129 is provided in thehollow guide pipe 138. As can be seen from Figs. 7 and 8, the torsionspring pull rod 129 is provided on an outer wall surface with an axially extendedgroove 130 of any geometrical cross section. In the illustrated embodiment, thegroove 130 has a triangular cross section. Meanwhile, thehollow guide pipe 138 is provided on an inner wall surface with an axiallyextended rib 131 having a cross section corresponding to thegroove 130. The torsionspring pull rod 129 is mounted in thehollow guide pipe 138 by aligning and engaging thegroove 130 with therib 131, such that the torsionspring pull rod 129 is guided by therib 131 to slide in thehollow guide pipe 138 only in an axial direction. Astopper 132 is provided near an upper end of the torsionspring pull rod 129 to limit a distance by which the torsionspring pull rod 129 can be moved downward in thehollow guide pipe 138. The torsionspring pull rod 129 is provided at a lower end surface with an internally threadedhole 133, and at an upper end surface with ahole 139 for abar 140 to insert therein. Aspring holding ring 134 is connected to a top of thebar 140. Thebar 140 may be integrally formed with or additionally screwed to the torsionspring pull rod 129. Thehollow guide pipe 138 is also integrally formed on the outer wall surface with aspring seat 135, on a top center of which a dent is provided. Atorsion spring 136 is mounted in theswitch unit 12 with two ends separately movably connected to thespring holding ring 134 on thebar 140 and the dent on thespring seat 135. - The
sealing disc 13 is located at the bottom of thecase 11 below the sealedsection 112. Thesealing disc 13 has an annular lower end surface flush with the bottom of thecase 11, and has a curved peripheral surface matching with the curved lower surface of the sealedsection 112. The curved peripheral surface of thesealing disc 13 effectively prevents impurities and wastes in the waste water from staying around thesealing disc 13 to adversely affect a sealed condition at a joint 137 between the sealingdisc 13 and the sealedsection 112. Thesealing disc 13 is provided with a through hole, which is aligned with the threadedhole 133 on the lower end surface of the torsionspring pull rod 129 when theswitch unit 12 is mounted in thecase 11. A screw is extended through the through hole on thesealing disc 13 into the threadedhole 133 to fixedly connect thesealing disc 13 to the torsionspring pull rod 129. - The connecting
interface 2 is a hollow cylindrical member externally mounted around an upper part of thecase 11 of the drain basket 1, so as to connect the drain basket 1 to the drain pipe or the existing bell-type floor drain. Afirst sealing ring 5 is mounted between theflange 111 of thecase 11 and the connectinginterface 2. - The sealing
member 3 is an annular member externally mounted around the connectinginterface 2. A contact surface between the connectinginterface 2 and the sealingmember 3 is sealed by an L-shapedsecond sealing ring 6. Thesecond sealing ring 6 may be other suitable shape. The sealingmember 3 is formed along an outer circumferential surface with asemi-circular recess 31, in which an O-ring 8 is mounted. With the sealingmember 3, a good sealing effect is produced at the joint of the drain basket 1 and an inner wall surface of the drain pipe or the existing bell-type floor drain. - When the present invention is in use, waste water flown into the drain basket 1 applies a downward force on the
sealing disc 13. At this point, the torsionspring pull rod 129 is caused to move downward and open the joint 137, allowing the waste water to flow into the drain pipe via the opened joint 137. When all the waste water has been drained, thetorsion spring 136 brings thepull rod 129 upward, and thesealing disc 13 is caused to move upward and seal the joint 137 again, so that sewage, bad smell, hazardous gas, and insects are stopped from entering into a room via the floor drain due to a positive pressure state in the drain pipe. - It is noted the
switch unit 12 in the present invention is mounted to one side of the drain basket 1. As compared with the existing floor drain having a sealing switch unit mounted to a center of the drain basket, a hindrance from theswitch unit 12 of the present invention to the waste water flowing through the drain basket 1 is minimized, preventing an overflowed floor drain when there is a large amount of waste water. Moreover, the present invention eliminates the problem of hair and other impurities held to the switch unit. Theswitch unit 12 of the present invention also has simple structure and reduced components to enable convenient, stable, and safe use thereof.
Claims (10)
- A self-sealing floor drain, comprising a drain basket mounted in a drain pipe or an existing bell-type floor drain, and a sealing disc movably mounted at a water outlet of said drain basket; said drain basket being a hollow cylinder having a case; said self-sealing floor drain being characterized in that said case of said drain basket is provided on an inner wall surface with a switch unit, and said switch unit is internally provided with a torsion spring for opening and closing said sealing disc.
- The self-sealing floor drain as claimed in claim 1, wherein said case of said drain basket is provided on an inner sidewall surface with a pair of slide grooves, and said switch unit is slidably mounted to said slide grooves.
- The self-sealing floor drain as claimed in claim 2, wherein said switch unit is a hollow body having a trapezoid vertical section and a substantially oblong cross section, a top surface and a left end wall surface, both of which have a curved cross section, an open right end, two sidewalls, and a bottom surface; each of said two sidewalls being integrally provided along an end adjacent to said open right end with an outward protruded edge, said protruded edges having a cross section and size identical to that of said slide grooves on said case of said drain basket, so that said protruded edges may be inserted into said slide grooves; and said bottom surface of said switch unit being formed with a through hole.
- The self-sealing floor drain as claimed in claim 3, wherein end surfaces of said sidewalls and said protruded edges of said switch unit in contact with said case have a curved cross section corresponding to that of the inner sidewall surface of said case.
- The self-sealing floor drain as claimed in claim 4, wherein said bottom surface of said switch unit is integrally formed on an upper side thereof with a vertically extended hollow guide pipe, which is concentric with said through hole on said bottom surface and has an inner diameter the same as a diameter of said through hole; said hollow guide pipe having a cylindrical torsion spring pull rod provided therein; said torsion spring pull rod being provided on an outer wall surface with an axially extended groove, and said hollow guide pipe being provided on an inner wall surface with an axially extended rib corresponding to and received in said groove on said torsion spring pull rod.
- The self-sealing floor drain as claimed in claim 5, wherein said torsion spring pull rod is provided near an upper end with a stopper to limit a distance by which said torsion spring pull rod can be moved downward in said hollow guide pipe; said torsion spring pull rod being provided at a lower end surface with an internally threaded hole, and at an upper end surface with a hole for a bar to insert therein, and said bar having a spring holding ring connected to a top thereof; said hollow guide pipe being also integrally formed on the outer wall surface with a spring seat, on a top center of which a dent is provided; and the torsion spring being mounted in said switch unit with two ends separately movably connected to said spring holding ring on said bar and said dent on said spring seat.
- The self-sealing floor drain as claimed in any one of claims 1 to 6, wherein said drain basket includes a sealed section downward extended from a position slightly higher than the water outlet of said case to a slightly radially inward projected position, and said sealed section having curved upper and lower surfaces; said sealing disc having a curved peripheral surface matching with the curved lower surface of said sealed section; said sealing disc being provided with a through hole, which is aligned with said threaded hole on the lower end surface of said torsion spring pull rod, such that a screw may be extended through said through hole on said sealing disc into said threaded hole on said torsion spring pull rod to fixedly connect said sealing disc to said torsion spring pull rod.
- The self-sealing floor drain as claimed in claim 7, wherein said case of said drain basket has a radially outward flange integrally formed around a top water inlet of said drain basket.
- The self-sealing floor drain as claimed in claim 8, further comprising a connecting interface externally mounted around said case of said drain basket; said connecting interface being a hollow cylindrical member for connecting said drain basket to the drain pipe or the existing bell-type floor drain; and a first sealing ring being mounted between said flange of said case and said connecting interface.
- The self-sealing floor drain as claimed in claim 9, further comprising an annular sealing member externally mounted around said connecting interface; and a contact surface between said connecting interface and said sealing member being sealed by an L-shaped second sealing ring; and said sealing member being formed along an outer circumferential surface with a semi-circular recess, in which an O-ring is mounted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2004200081956U CN2714643Y (en) | 2004-03-10 | 2004-03-10 | Automatically closed type floor drain |
PCT/CN2004/001576 WO2005085537A1 (en) | 2004-03-10 | 2004-12-30 | Self-sealing floor drainage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1724402A1 true EP1724402A1 (en) | 2006-11-22 |
EP1724402A4 EP1724402A4 (en) | 2007-04-04 |
Family
ID=34869963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04802588A Withdrawn EP1724402A4 (en) | 2004-03-10 | 2004-12-30 | Self-sealing floor drainage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1724402A4 (en) |
CN (2) | CN2714643Y (en) |
HK (1) | HK1090966A1 (en) |
WO (1) | WO2005085537A1 (en) |
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CN107907473A (en) * | 2017-11-14 | 2018-04-13 | 东莞市联洲知识产权运营管理有限公司 | A kind of self-draining arrangement in salt spray test chamber |
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CN112031128B (en) * | 2020-08-12 | 2021-11-09 | 淮北木文信息科技有限公司 | Deodorant type floor drain core convenient to debris clearance |
CN113969611B (en) * | 2021-09-01 | 2023-07-07 | 中国人民解放军火箭军工程大学 | Civil engineering is with improved generation anti-reverse floor drain device |
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WO2000014345A1 (en) * | 1998-09-03 | 2000-03-16 | Jong Sun Kim | Apparatus for preventing reverse flow in drainage |
EP1188870A2 (en) * | 2000-09-18 | 2002-03-20 | Geberit Technik Ag | Odour seal for a urinal |
US20020189675A1 (en) * | 2001-06-19 | 2002-12-19 | Huber Donald G. | Check valve floor drain |
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CN2095229U (en) * | 1991-03-06 | 1992-02-05 | 蔡理强 | Deodorising device for closet and floor drain |
CN2087217U (en) * | 1991-03-27 | 1991-10-23 | 刘志斌 | Valve preventing waste water from overflow |
CN2111973U (en) * | 1992-01-18 | 1992-08-05 | 张永 | Deodorising self-closed valve for sewer |
CN2210212Y (en) * | 1994-03-16 | 1995-10-18 | 刘兆玉 | Odour sealing article for floor drain |
CN2258201Y (en) * | 1996-03-26 | 1997-07-23 | 赵长江 | Sewer deodorizer |
WO1999027199A1 (en) * | 1997-11-19 | 1999-06-03 | Ian Alexander Mackay | Drain assembly |
CN1378019A (en) * | 2001-04-05 | 2002-11-06 | 姜雪岩 | Spring type floor drain check valve |
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2004
- 2004-03-10 CN CNU2004200081956U patent/CN2714643Y/en not_active Expired - Lifetime
- 2004-12-30 WO PCT/CN2004/001576 patent/WO2005085537A1/en not_active Application Discontinuation
- 2004-12-30 EP EP04802588A patent/EP1724402A4/en not_active Withdrawn
- 2004-12-30 CN CNB2004800421452A patent/CN100414047C/en not_active Expired - Fee Related
-
2006
- 2006-10-20 HK HK06111590A patent/HK1090966A1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2238327A (en) * | 1989-11-18 | 1991-05-29 | Steve Siow Kuang Yeo | Drain cover assembly incorporating non-return valve |
WO2000014345A1 (en) * | 1998-09-03 | 2000-03-16 | Jong Sun Kim | Apparatus for preventing reverse flow in drainage |
EP1188870A2 (en) * | 2000-09-18 | 2002-03-20 | Geberit Technik Ag | Odour seal for a urinal |
US20020189675A1 (en) * | 2001-06-19 | 2002-12-19 | Huber Donald G. | Check valve floor drain |
Non-Patent Citations (1)
Title |
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See also references of WO2005085537A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102677765A (en) * | 2012-05-28 | 2012-09-19 | 张德利 | Floor drain |
CN105317102A (en) * | 2014-08-04 | 2016-02-10 | 许炎章 | Inner core for floor drain |
Also Published As
Publication number | Publication date |
---|---|
CN2714643Y (en) | 2005-08-03 |
CN100414047C (en) | 2008-08-27 |
EP1724402A4 (en) | 2007-04-04 |
HK1090966A1 (en) | 2007-01-05 |
WO2005085537A1 (en) | 2005-09-15 |
CN1926290A (en) | 2007-03-07 |
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