A drainage fitting (10) is described. The drainage fitting (10) comprises a housing (12) adapted to be inserted into a drainage outlet, the housing defining a housing inlet (14) and a housing outlet (16) and a one way valve (18) adapted to be received within the housing (12). The one way valve (18)
A drainage fitting (10) is described. The drainage fitting (10) comprises a housing (12) adapted to be inserted into a drainage outlet, the housing defining a housing inlet (14) and a housing outlet (16) and a one way valve (18) adapted to be received within the housing (12). The one way valve (18) has a body defining a valve inlet (22), a valve outlet (24) and a valve passageway (26), the passageway (26) providing fluid communication between the housing inlet (14) and the housing outlet (16). The drainage fitting (10) further comprises a fitting insert (28) adapted to be located in the housing inlet (14), the fitting insert (28) defining an insert portion (30) adapted to extend through the valve inlet (22) and into the valve passageway (26). In the presence of a negative pressure differential, air can pass through the valve (18) to relieve the pressure differential, but in the event of a positive pressure differential, the insert portion (30) prevents the one way valve from inverting to relieve the pressure differential.
대표청구항▼
1. A floor drain fitting, the floor drain fitting being configured to be press fitted into a drainage outlet, wherein the floor drain fitting comprises: a housing comprising an upper surface defining a housing inlet, a lower surface defining a housing outlet and a sidewall defining a housing through
1. A floor drain fitting, the floor drain fitting being configured to be press fitted into a drainage outlet, wherein the floor drain fitting comprises: a housing comprising an upper surface defining a housing inlet, a lower surface defining a housing outlet and a sidewall defining a housing throughbore, wherein the sidewall includes an external surface profile and a radially extending lip extending from the upper surface, wherein the external surface profile is configured to receive and engage with a complementary internal surface profile of a seal, wherein an assembly of the housing and the seal is configured to be inserted by a press-fit as a unit into the drainage outlet;wherein the seal includes a body and an upper surface, wherein an inner surface of the body includes the internal surface profile and an outer surface of the body includes a plurality of radially extending fins, wherein the upper surface of the seal comprises a recess and a radially extending seal lip, wherein the radially extending seal lip of the housing is received and engaged in the recess and wherein, in use, the seal radially extending lip engages with a floor adjacent to the drainage outlet and the radially extending fins engage with an inner surface of the drainage outlet;a one-way valve configured to be received within the housing, the one-way valve being operable to allow fluid communication between the housing inlet and the housing outlet and preventing fluid communication between the housing outlet and the housing inlet in a direction from the housing outlet to the housing inlet. 2. A floor drain fitting, the floor drain fitting being configured to be press fitted into a drainage outlet, wherein the floor drain fitting comprises: a housing comprising an upper surface defining a housing inlet, a lower surface defining a housing outlet and a sidewall defining a housing throughbore, wherein the sidewall includes an external surface profile; anda radially extending lip extending from the upper surface, wherein the external surface profile is configured to receive and engage with a complementary internal surface profile of a seal, wherein the internal surface profile of the seal and the external surface profile of the housing include complementary ribs and ridges, where the ribs are received in the ridges to engage the seal and housing for press-fit insertion as a unit into the drainage outlet;wherein the seal includes a body and an upper surface, wherein an inner surface of the body includes the internal surface profile and an outer surface of the body includes a plurality of radially extending fins, wherein the upper surface of the seal comprises a recess and a radially extending seal lip, wherein the radially extending seal lip of the housing is received and engaged in the recess and wherein, in use, the radially extending seal lip engages with a floor adjacent to the drainage outlet and the radially extending fins engage with an inner surface of the drainage outlet thereby providing multi-contact sealing with the drainage outlet and an area of floor adjacent to the drainage outlet; anda one-way valve adapted to be received within the housing, wherein the one-way valve is configured to allow fluid flow between the housing inlet and the housing outlet and to prevent fluid flow between the housing outlet and the housing inlet in a direction from the housing outlet to the housing inlet. 3. A floor drain fitting, the floor drain fitting being configured to be press-fitted into a drainage outlet, wherein the floor drain fitting comprises: a housing comprising an upper surface defining a housing inlet, a lower surface defining a housing outlet, and a sidewall defining a housing throughbore, wherein the sidewall includes an external surface profile and a radially extending lip extending from the upper surface, wherein the external surface profile is configured to receive and engage with a complementary internal surface profile of a seal, wherein an assembly of the housing and the seal is configured to be inserted by a press-fit as a unit into the drainage outlet;wherein the seal includes a body and an upper surface, wherein an inner surface of the body includes the internal surface profile and an outer surface of the body includes a plurality of radially extending fins, wherein the upper surface of the seal comprises a recess and a radially extending seal lip, wherein the radially extending seal lip of the housing is received and engaged in the recess and wherein, in use, the radially extending seal lip engages with a floor adjacent to the drainage outlet and the radially extending fins engage with an inner surface of the drainage outlet;a one-way duck bill valve adapted to be received within the housing, the one-way duck bill valve having a body defining a valve inlet, a valve outlet and a valve passageway, the passageway providing fluid communication between the housing inlet and the housing outlet and preventing fluid communication between the housing outlet and the housing inlet in a direction from the housing outlet to the housing inlet; anda fitting insert located in the housing inlet, the fitting insert defining an insert portion which extends through the valve inlet and into a mouth of the valve passageway;wherein in the presence of a negative pressure differential, air can pass through the valve to relieve the pressure differential, but in the event of a positive pressure differential, the insert portion is operable to prevent the one-way duck bill valve from inverting to relieve the pressure differential. 4. The floor drain fitting of claim 3, wherein the seal is adapted to be releaseably attachable to the housing external surface. 5. The floor drain fitting of claim 3, wherein the seal forms an interference fit with the housing. 6. The floor drain fitting of claim 3, wherein the fitting insert is releaseably locatable in the housing inlet. 7. The floor drain fitting of claim 6, wherein the fitting insert is releaseably locatable by means of a push fit, twist fit, screw fit or threadable connection. 8. The floor drain fitting of claim 6, wherein the fitting insert is locatable in the housing inlet by means of a bayonet fitting. 9. The floor drain fitting of claim 3, wherein, once located within the housing inlet, an upper surface of the fitting insert is co-planar with the upper surface of the housing. 10. The floor drain fitting of claim 3, wherein the floor drain fitting further comprises a drain cover. 11. The floor drain fitting of claim 10, wherein at least one of an upper surface of the fitting insert and the upper surface of the housing define lugs adapted to support the drain cover. 12. The floor drain fitting of claim 10, wherein the upper surface of the housing comprises a plurality of castellation configured to support a portion of the drain cover receivable over the floor drain fitting. 13. The floor drain fitting of claim 3, wherein the one-way duck bill valve is sandwiched between the housing and the fitting insert. 14. The floor drain fitting of claim 3, wherein the fitting insert defines a filter. 15. The floor drain fitting of claim 14, wherein the filter extends across an inlet of the fitting insert. 16. The floor drain fitting of claim 14, wherein the filter defines a grill. 17. The floor drain fitting of claim 16, wherein the insert portion downwardly depends from the grill. 18. The floor drain fitting of claim 17, wherein the insert portion extends from the grill through the valve inlet and into the centre of the valve passageway. 19. The floor drain fitting of claim 3 wherein, in use, the upper surface of the housing, the upper surface of the seal and an upper surface of the fitting insert are substantially co-planar. 20. The floor drain fitting of claim 3, wherein the radially extending seal lip is operable to create a contact seal with the floor adjacent to the drainage outlet in which the floor drain fitting is inserted. 21. The floor drain fitting of claim 3, wherein the internal surface profile of the seal and the external surface profile of the housing include complementary ribs and ridges, where the ribs are received in the ridges to engage the seal and housing for insertion as a unit into the drainage outlet.
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이 특허에 인용된 특허 (11)
Kim, Jong Sun, Apparatus for preventing reverse flow in drainage.
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