DK176127B1 - waste trap - Google Patents

waste trap Download PDF

Info

Publication number
DK176127B1
DK176127B1 DK200401171A DKPA200401171A DK176127B1 DK 176127 B1 DK176127 B1 DK 176127B1 DK 200401171 A DK200401171 A DK 200401171A DK PA200401171 A DKPA200401171 A DK PA200401171A DK 176127 B1 DK176127 B1 DK 176127B1
Authority
DK
Denmark
Prior art keywords
water
built
water trap
ceiling
trap according
Prior art date
Application number
DK200401171A
Other languages
Danish (da)
Inventor
Benny Peter Hansen Naur
Original Assignee
Benny Peter Hansen Naur
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Benny Peter Hansen Naur filed Critical Benny Peter Hansen Naur
Priority to DK200401171A priority Critical patent/DK176127B1/en
Priority to EP05388063A priority patent/EP1627968A3/en
Publication of DK200401171A publication Critical patent/DK200401171A/en
Application granted granted Critical
Publication of DK176127B1 publication Critical patent/DK176127B1/en

Links

Classifications

    • 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
    • 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
    • E03C1/29—Odour seals having housing containing dividing wall, e.g. tubular
    • 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

Description

, DK 176127 B1, DK 176127 B1

Opfindelsen angår en indbygningsvandlås til indbygning i gulvafløbsskål af den art, som består af en overdel med indløbshul og dykket indløbsrør, som går ned i en underdels gennemstrømmelige vandreservoir.BACKGROUND OF THE INVENTION The invention relates to a built-in water trap for installation in a floor drain bowl of the type, which consists of a top with an inlet hole and a dipped inlet pipe, which goes down into a bottom flowable water reservoir.

De kendte indbygningsvandlåse af nævnte art er opbygget med en overdel, hvis runde 5 indløbshul er centralt eller forskudt placeret og med rundt dykket indløbsrør, der går ned i en rund underdel/underskål, som er centreret eller parallelt forskudt i forhold til det dykkede indløbsrør og har større diameter end det dykkede indløbsrør. Den 1 vandkanal, som opstår mellem det dykkede indløbsrørs ydervæg og underskålens indervæg, er væsentlig forskellig i tværprofil og dimension sammenlignet med 10 indløbsrørets tværprofil og dimension, hvilket bevirker, at vandsøjlen fra indløbsrøret splittes ud i et snævrere forløb i underskålen, mister kraft, lettere blokeres og tilstoppes. Underskålen er på forskellig vis fastgjort til overdelen. Denne fastgørelse kan være en lodret akse, som med tværstivere, der gennemskærer indløbshullet, er fastgjort til overdelen og går ned midt gennem indløbsrøret til bunden af underskålen.The known built-in water locks of said kind are constructed with an upper part, whose round 5 inlet hole is centrally or displacedly positioned and with a circular dive inlet tube, which descends into a round bottom / bottom bowl which is centered or parallel offset relative to the dived inlet tube and has a larger diameter than the dived inlet pipe. The 1 water channel that arises between the outer wall of the dived inlet pipe and the inner wall of the lower bowl is substantially different in cross profile and dimension compared to the cross profile and dimension of the inlet pipe, which causes the water column from the inlet pipe to split into a narrower flow in the lower bowl, blocked and clogged. The saucer is variously attached to the top. This attachment may be a vertical axis, which, with transverse struts cutting through the inlet hole, is attached to the top and descends midway through the inlet tube to the bottom of the lower bowl.

15 Fastgørelsen kan være en sammenskruning med stivere fra overdelens underkant gennem vandkanalen til underskålens overkant eller en direkte sammenhæftning af dykrørets ene udvendige side og underskålens ene indvendige side. Den i tværsnit og dimension uensartede vandkanal og disse fastgørelser af underskålen skaber barriere, der hindre en fri vandgennemstrømning og i særdeleshed samler hår i 20 indbygningsvandlåsen, som med tiden tilstopper. De runde indløbsrør skaber risiko for turbolens i vandstrømmen, hvilket giver lufttilførsel til vandlåsen og deraf mindre vandgennemstrømning.The attachment may be a collision with stiffeners from the bottom of the top through the water channel to the top of the bottom bowl or a direct attachment of one outer side of the diving tube and one inner side of the bottom. The disparate cross-section and dimension of the water channel and these attachments of the saucer create a barrier that prevents a free flow of water and, in particular, collects hair in the 20 built-in water locks, which eventually clog. The round inlet pipes create a risk of turbulence in the water flow, which provides air supply to the water trap and consequently less water flow.

For at samme konstruktion af indbygningsvandlåse kan anvendes siddende øverst i gulvafløbsskåle, forsynes de med en adapter. De kendte indbygningsvandlåse af den 25 art ses forsynet med en adapter, der sættes oven på indbygningsvandlåsen og fastgørelsen til vandlåsen sker ved en sammenkobling med indbygningsvandlåsens grebs befæstelse, der typisk er en udragende del af overdelen, som fanger hår m.v.In order for the same construction of built-in water locks to be used sitting at the top of floor drain bowls, they are provided with an adapter. The prior art built-in water locks of 25 are seen to be provided with an adapter which is placed on top of the built-in water lock and the attachment to the water lock is done by an interlocking with the grip of the built-in water lock, which is typically a protruding part of the upper part which catches hair, etc.

For at kunne trække indbygningsvandlåse op af gulvafløbsskåle, forsynes indbygningsvandlåse med et greb. Dette greb ses ofte at være et bøjlegreb, som på 30 den ene eller anden måde sidder eller ligger på tværs i overdelens top og skaber barriere for vandstrømmen og fanger hår m.v. Grebet er også kendt siddende som fast pladeformet greb i toppen ved periferien, men disse greb er vandrette og derfor en forhindring for vandet.To be able to pull the built-in water trap out of the floor drain bowls, the built-in water trap is provided with a grip. This grip is often seen as a bend grip, which in some way sits or lies transversely at the top of the top, creating a barrier to the flow of water and catching hair, etc. The grip is also known as fixed plate-shaped grip at the top at the periphery, but these grips are horizontal and therefore an obstacle to the water.

35 DE 202 17 152 U1 beskriver en indbygningsvandlås i ét stykke med en cirkulær --- - — -------- 2 DUC 176127 B1 vandkanal; der har tilnærmelsesvis ens dimension i form af diameter.DE 202 17 152 U1 discloses a one-piece built-in water trap with a circular --- - - -------- 2 DUC 176127 B1 water channel; having approximately the same diameter dimension.

Ved opfindelsen skabes en indbygningsvandlås af den indledningsvis nævnte art, men som har et væsentlig bedre, samlet, kraftigt og ensartet vandgennemstrømningsforløb gennem hele indbygningsvandlåsen, med væsentlig mindre risiko for tilstopning og 5 ingen turbolens i vandstrømmen.The invention creates a built-in water trap of the kind mentioned initially, but which has a significantly better, overall, powerful and uniform flow of water throughout the built-in water valve, with substantially less risk of clogging and no turbulence in the water flow.

Dette opnås ifølge opfindelsen ved at indbygningsvandlåsen er todelt og kan samles uden barriereskabende sammenkobling, idet overdelens dykkede indløbsrørs dimension passer ned i en fals i den i vandret tværsnit dobbelt så store underdels ene side, således , at indløbsrør og underdel ved sammensætning danner én i tværprofil ensartet vandkanal, 10 som i det væsentlige har firkantet tværprofil gennem hele indbygningsvandlåsen .This is achieved according to the invention in that the built-in water trap is two-fold and can be assembled without barrier-creating interconnection, the dimension of the dive inlet pipe fitting into a seam in the horizontal section twice the size of one part, so that the inlet pipe and lower part of the composition form one in cross profile. uniform water channel 10 having substantially square cross profile throughout the built-in water trap.

Det firkantede indløbshul og den firkantede vandkanal forhindrer turbulens i vandstrømmen, ligesom én i tværprofil ensartet vandkanal, som i det væsentlige har firkantet tværprofil og ensartet dimension uden barriere sikrer, at vandstrømmen med urenheder, hår,m.v. kan passere uhindret gennem hele indbygningsvandlåsen uden at 15 forårsage tilstopning, idet vandstrømmen ikke forstyrres unødigt af væsentlige ændringer i kanalforløbet, og urenheder med hår ikke fanges af en eller flere barrierer. Underdelens i det væsentlige firkantede vandrette profil med buet side og kæntringen af selve underdelen sikre et hesteskoformet afledningshul til vandet, der har forladt vandlåsen, mellem underdelens yderside og gulvafløbsskålens runde side.The square inlet hole and the square water channel prevent turbulence in the water flow, just as one in a cross profile uniform water channel, which has a substantially square cross profile and uniform dimension without barrier ensures that the water flow with impurities, hair, etc. can pass unobstructed throughout the built-in water trap without causing clogging, since the flow of water is not unnecessarily disturbed by significant changes in the channel flow and impurities with hair are not trapped by one or more barriers. The substantially square horizontal profile of the lower part with a curved side and the inclination of the lower part itself ensure a horseshoe-shaped drain hole for the water that has left the water trap, between the outside of the lower part and the round side of the floor drain bowl.

20 Hesteskoformen og kæntringen af underdelen udnytter den plads, der er til rådighed mellem underdelens buede overkant og overdelens perifere hvælvede underkant, bedre, idet det som anført sikre et større afledningshul til vandstrømmen, der forlader vandlåsen. Kæntringen bevirker også, at den vandsøjle, der kastes op fra underskålen mod overdelens loft, kastes op i en let vinkel ind mod vandlåsens centrum. Dette gør, 25 sammen med den nedenunder beskrevne rendefacon på loftet, at der fordeles mere vand ud til siderne, hvor afledningshulleme er størst.20 The horseshoe shape and the lower part of the lower part make better use of the space available between the curved upper edge of the lower part and the peripheral vaulted lower edge of the lower part, as, as stated, ensure a larger drainage hole for the water flow leaving the water trap. The tapping also causes the column of water to be thrown up from the lower bowl towards the ceiling of the top, to be thrown up at a slight angle towards the center of the water trap. This, together with the gutter shape described below, allows more water to be distributed to the sides where the drainage holes are largest.

Overdelens skrå indløbsflade mod indløbshullet skaber på undersiden et naturligt anvendeligt skråt loft over underdelens udløbhul, således at vandstrømmen ledes ud mod overdelens hvælving ved periferien. Den nedadvendte buede rendefacon på 30 samme loft over udløbshullet bevirker, at vandstrømmen fra udløbshullet også ledes ud til begge sider.The inclined inlet surface of the upper part towards the inlet hole creates on the underside a naturally applicable inclined ceiling over the outlet hole of the lower part, so that the flow of water is directed towards the upper part of the upper vault. The downwardly curved gutter shape of the same ceiling above the outlet hole causes the water flow from the outlet hole to be directed out to both sides.

Med en hvælvet overgang mellem overdelens skrå loft og nederste indvendige periferikant på overdelen, skabes en bedre afledning og vending af vandstrømmen fra afløbshullet og vandet ledes på den måde ned mellem underskålens yderside og 35 gulvafløbsskålen.With a vaulted transition between the sloping ceiling of the upper part and the lower inner periphery of the upper part, a better drainage and reversal of the water flow is created from the drain hole and the water is thus led down between the outside of the lower bowl and the floor drain bowl.

3 DK 176127 B13 DK 176127 B1

Idet der umiddelbart under overdelens perifere kant over tætningsringen er en fals, isat en blindring, til evt. placering af en adapter, som ved isætning alene fastholdes i falsen mellem overdelens perifere kant og tætningsringen, skabes en påsætning af adapteren uden barriereskabende befæstelser, ligesom det ikke forøger selve højden af 5 indbygningsvandlåsen. Monteringen af adapter sker ved at fjerne blindring og tætningsring, isætte adapter og genindsætte tætningsring.Since immediately below the peripheral edge of the upper sealing ring there is a seam, fitted with a blind ring, for any. placement of an adapter which, when inserted only, is retained in the crease between the peripheral edge of the upper and the sealing ring, creates an attachment of the adapter without barrier-creating fasteners, and does not increase the height of the built-in water valve itself. The fitting of the adapter is done by removing the blind ring and sealing ring, insert the adapter and reinsert the sealing ring.

Indbygningsvandlåsens faste greb er integreret i overdelens perifere kant, idet det er • placeret, hvor afstanden til indløbshullet er mindst og skråt ned mod dette. Grebet, der er fladt og pladeformet, medvirker til at lede vandet mod indløbshullet, ligesom det ikke 10 fanger hår m.v.The fixed handle of the recessed water trap is integrated into the peripheral edge of the upper part, where it is located • where the distance to the inlet hole is the least and inclined down to this. The handle, which is flat and plate-shaped, helps to direct the water towards the inlet hole, just as it does not catch 10 hairs, etc.

Opfindelsen forklares nærmere i det følgende under henvisning til tegningerne, hvor Fig. 1 viser indbygningsvandlåsen, ifølge opfindelsen, set fra oven.The invention will be explained in more detail below with reference to the drawings, in which 1 is a plan view of the built-in water trap according to the invention.

Fig. 2 viser et vandret tværsnit af underskålen med det dykkede indløbsrør og i periferien væggen af gulvafløbsskålen.FIG. 2 shows a horizontal cross-section of the lower bowl with the dipped inlet pipe and in the periphery the wall of the floor drain bowl.

15 Fig. 3 viser den samlede indbygningsvandlås set i tværsnit fra siden.FIG. 3 shows the total built-in water trap seen in cross-section from the side.

Fig. 4 viser indbygningsvandlåsen set i tværsnit fra siden ind mod underskålens buede udløbsside.FIG. 4 is a cross-sectional side view of the recessed water trap towards the curved outlet side of the saucer.

På Fig. 1,2, 3 og 4 ses indbygningsvandlåsen med overdelens 14's skrå indløbsflade 1, der fører vandet til det i det væsentlige firkantede indløbshul 2, der fører 20 vandstrømmen ned gennem overdelens indløbsrør 3, hvis tværprofil og dimension er ensartet med indløbshullet. Fra indløbsrøret 3 strømmer vandet ned i underdelens vandkanal 4, hvis tværprofil og dimension er ensartet med indløbsrørets og indløbshullets. Idet vandstrømmen forlader underskålen 15 ad udløbshullet 5, rammer den overdelens skrå loft 6 over udløbshullet. Loftet går skråt op og ud mod overdelens 25 perifere underkant 7, ligesom loftet buer nedad i en rendefacon 8, hvilket tilsammen bevirker, at vandstrømmen bliver ført ud til tre sider mod overdelens perifere underkant 7, hvor hvælvingen 9 mellem loft og den perifere kant leder vandstrømmen nedad mod det hesteskoformede hul 10, der er mellem underdelens yderside 11 og , gulvafløbsskålen 12. Underskålen 15's lodrette side 13 er kæntret i forhold til overdelen 30 og gulvafløbsskålen.In FIG. 1,2, 3 and 4, the built-in water trap is seen with the inclined inlet surface 1 of the upper 14, which leads the water to the substantially square inlet hole 2, which leads the water flow down through the upper inlet pipe 3, whose cross profile and dimension are uniform with the inlet hole. From the inlet pipe 3, the water flows down into the water channel 4 of the lower part, whose transverse profile and dimension are consistent with that of the inlet pipe and inlet hole. As the water flow exits the bottom bowl 15 through the outlet hole 5, it hits the sloping ceiling 6 of the upper part above the outlet hole. The ceiling extends upwardly toward the peripheral bottom edge 7 of the top 25, just as the ceiling arches downwardly into a gutter shape 8, which together causes the flow of water to be directed to three sides towards the peripheral bottom edge 7 where the arch 9 between the ceiling and the peripheral edge leads the flow of water downward against the horseshoe-shaped hole 10, which is between the outer surface 11 of the lower part and the floor drain bowl 12. The vertical side 13 of the lower bowl 15 is marked relative to the upper part 30 and the floor drain bowl.

På Fig. 4 ses indbygningsvandlåsens adapter, der fastholdes i fals 16 mellem overdels perifere overkant og tætningsring. På Fig. 3 ses det skrå integrerede faste greb 17.In FIG. 4 shows the adapter of the built-in water trap, which is held in socket 16 between the upper peripheral upper edge and the sealing ring. In FIG. 3, the oblique integrated fixed grip 17 is seen.

Claims (5)

1. Indbygningsvandlås, til indbygning i gulvafløbsskål, hvilken vandlås omfatter en overdel med dykket indløbsrør og en underdel med gennemstrømmeligt 5 vandreservoir og en vandkanal med ensartet dimension, kemdeieginieit ved, at indbygningsvandlåsen er todelt og at indløbsrøret (3) og underdelen (15) tilsammen danner en i tværprofil ensartet vandkanal (3,4), som i det væsentlige har firkantet tværprofil gennem indbygningsvandlåsen og at underdelen (15) har * en i det væsentlige firkantet vandret profil med buet side (fig.2, nr. 11) og at 10 underdelens overkant er kæntret (13) til siden i forhold til overdelen (14) og gulvafløbsskålen (12), således at underdelens akse danner en vinkel med overdelens akse.A built-in water trap, for installation in a floor drain bowl, which includes a top with a dipped inlet pipe and a bottom part with a flowable 5 water reservoir and a water channel of uniform dimension, the chemical element being two-fold and the inlet pipe (3) and the bottom part (15) forming a transverse profile uniform water channel (3,4) which has substantially a square cross profile through the built-in water trap and that the base (15) has a substantially square horizontal profile with a curved side (Fig. 2, No. 11) and that The upper edge of the lower part is tilted (13) to the side relative to the upper part (14) and the floor drain bowl (12), so that the axis of the lower part forms an angle with the axis of the upper part. 2. Indbygningsvandlås ifølge krav 1, kenudeiegmei ved, at overdelens (14) skrå loft 15 (6) har nedadbuet rendefacon (8) netop over underdelens udløbshul (5), idet rendens retning går fra overdelens indløbshul (2) til midt over underdelens buede sides midte.The built-in water trap according to claim 1, characterized in that the sloping ceiling 15 (6) of the upper part (14) has a downwardly extending gutter shape (8) just above the outlet hole (5) of the lower part, the direction of the gutter extending from the upper inlet hole (2) to the middle of the bottom of the lower part. the center. 3. Indbygningsvandlås ifølge krav 1 eller 2, keradeSegnei ved, at overdelens (14) 20 skrå loft (6) har hvælvet overgang (9) startende yderst på loftet nær periferien og nedad til overdelens nederste, inderste perifere kant (7) og i længden gående vandret rundt langs periferien.A recessed water trap according to claim 1 or 2, characterized in that the inclined ceiling (6) of the upper part (14) has a vaulted transition (9) starting at the outermost ceiling near the periphery and downwards to the lower, inner peripheral edge (7) of the upper part and the length. walking around the periphery. 4. Indbygningsvandlås ifølge et hvilket som helst af kravene 1-3, kemdeftegimei 25 ved, at der umiddelbart under overdelens perifere kant over tætningsring er en fals (16), isat blindring, til evt. placering af adapter.4. A built-in water trap according to any one of claims 1 to 3, characterized in that immediately there is a sealing ring (16), fitted with a blind ring, immediately below the peripheral edge of the sealing ring. location of adapter. 4 OK 176127 BH4 OK 176127 BH 5. Indbygningsvandlås ifølge et hvilket som helst af de foregående krav, kemdeiegmet ved, at der i overdelens perifere kant, hvor kanten er tættest på t 30 indløbshullet, skråt ind og ned mod indløbshullet er et i overdelen fast integreret greb (17).A recessed water trap according to any one of the preceding claims, characterized in that, at the peripheral edge of the upper part, where the edge is closest to the inlet hole, inclined in and down towards the inlet hole, there is an integral grip (17) fixed in the upper part.
DK200401171A 2004-08-02 2004-08-02 waste trap DK176127B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK200401171A DK176127B1 (en) 2004-08-02 2004-08-02 waste trap
EP05388063A EP1627968A3 (en) 2004-08-02 2005-08-02 A water-seal drainage trap

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200401171 2004-08-02
DK200401171A DK176127B1 (en) 2004-08-02 2004-08-02 waste trap

Publications (2)

Publication Number Publication Date
DK200401171A DK200401171A (en) 2006-02-03
DK176127B1 true DK176127B1 (en) 2006-09-11

Family

ID=35385825

Family Applications (1)

Application Number Title Priority Date Filing Date
DK200401171A DK176127B1 (en) 2004-08-02 2004-08-02 waste trap

Country Status (2)

Country Link
EP (1) EP1627968A3 (en)
DK (1) DK176127B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1031802C2 (en) * 2006-05-11 2007-11-13 Easy Sanitairy Solutions Bv Drain.
NL2022631B1 (en) 2019-02-25 2020-09-01 Easy Sanitary Solutions Bv Odor trap with flexible flap
DE102022116861A1 (en) * 2022-07-06 2024-01-11 Wiedemann Gmbh Odor trap for a floor drain

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH169289A (en) * 1933-09-18 1934-05-31 Buergin & Cie Floor siphon.
FR998057A (en) * 1949-09-22 1952-01-14 Amaury Fils Soc Sink trap
BE898581A (en) * 1983-12-29 1984-04-16 Willemaers Gaston Stench trap for vertical drain - has box with top inlet and bottom outlet and contg. two inclined baffles defining water lock with plug
GB2285460B (en) * 1993-12-14 1997-01-08 Harmer Holdings Ltd Syphonic rainwater outlet
DE29611960U1 (en) * 1996-07-12 1996-11-21 Loeffler Stefan Odor trap
DE20217152U1 (en) * 2002-11-07 2003-01-16 Wiedemann Gmbh Sink box with installation housing and odor trap
GB0313987D0 (en) * 2003-06-17 2003-07-23 Beldore Ltd Improvements to the design of waste traps

Also Published As

Publication number Publication date
EP1627968A2 (en) 2006-02-22
EP1627968A3 (en) 2006-10-18
DK200401171A (en) 2006-02-03

Similar Documents

Publication Publication Date Title
JP6766119B2 (en) Siphon type flush toilet flush valve for use in toilet bowl
US9038320B1 (en) Downspout for a gutter system with an integrated rainwater holding chamber
US20080073257A1 (en) Pool skimmer apparatus and method
US20140069536A1 (en) Rainwater diverter
ES2928402T3 (en) Sump to evacuate water from a walkable floor to a drainage pipe
JP2010031551A (en) Flush toilet bowl
US20120167296A1 (en) Urinal drain trap
US20100230333A1 (en) Anti-siphon trap with snorkel
DK176127B1 (en) waste trap
CZ285295B6 (en) Roof water inlet
JP6701513B2 (en) Flush toilet
JP5818230B2 (en) Flush toilet
JP4709981B2 (en) Drain trap
EP3059352B1 (en) Combination of a shower drain and a device for capturing dirt
JP4842021B2 (en) Drain trap
EP2060682A3 (en) Floor drain with removable odour seal
KR200444012Y1 (en) Outlet trap
JP2002256609A (en) Floor drain trap
JP5158455B2 (en) Flush toilet
JP2008150785A (en) Rainwater flow-down promoting device in downpipe
JP5423059B2 (en) Bathroom drainage equipment
TWM574622U (en) Clean-free water tower
KR100712963B1 (en) Apparatus for preventing noise or counter inflow for draining pipe
JP2010084441A (en) Cover for dust inflow prevention
JP6722398B2 (en) Drain trap

Legal Events

Date Code Title Description
PSP Patent surrendered