초록 ▼

A dispenser drain attachment includes a threaded cap having a tapered drain socket and an associated drain tube. The interior of the drain tube has a double diaphragm which seals the drain tube, as well as an elastic gas bellows for dispensing liquid portions by alternating deformation of the diaphr

A dispenser drain attachment includes a threaded cap having a tapered drain socket and an associated drain tube. The interior of the drain tube has a double diaphragm which seals the drain tube, as well as an elastic gas bellows for dispensing liquid portions by alternating deformation of the diaphragm disks of the double diaphragm, which acts as a one-way valve. Such deformation is the result of pressure conditions which change when the gas bellows is compressed and then again released. The dispenser drain attachment is assembled from only two one-piece structural parts, each of which is produced by a two-component injection molding procedure.

대표청구항 ▼

1. A dispenser drain attachment, comprising:a first one-piece structural part forming a threaded cap with a tapering drain socket having an extension and a double diaphragm with deformable diaphragm disks on said extension, said first one-piece structural part being made in an injection molding proc

1. A dispenser drain attachment, comprising:a first one-piece structural part forming a threaded cap with a tapering drain socket having an extension and a double diaphragm with deformable diaphragm disks on said extension, said first one-piece structural part being made in an injection molding procedure;a second one-piece structural part forming a drain tube for receiving said double diaphragm for sealing said drain tube, said second one-piece structural part further including an elastic gas bellows for dispensing a flowable media by alternately deforming said deformable diaphragm disks of said double diaphragm as one-way valves resulting from changed pressure conditions occurring when said elastic gas bellows is deformed via compression and release, said second one-piece structural part being made in an injection-molding procedure; and,means for attaching said first one-piece structural part to said second one-piece structural part, said means for attaching being formed as an integral part of at least one of said first one-piece structural part or said second one-piece structural part,said dispenser drain attachment comprising of said first one-piece structural part and said second one-piece structural part with each of said one-piece structural parts made via two-component injection molding comprising a first component and a second component, whereas said second component for said double diaphragm with its said deformable diaphragm disks and for said elastic gas bellows being a softer and more flexible material than said first component for said threaded cap with said tapering drain socket and for said drain tube, there being a lateral receiving sleeve shaped on an outer side of said drain tube, said lateral receiving sleeve merging on one side into a film hinge, onto which a retaining ring with an inserting collar is molded, said inserting collar being capable of being tightly clipped into said lateral receiving sleeve. 2. The dispenser drain attachment according to claim 1, wherein said tapered drain socket of said threaded cap of said first one-piece structural part has a perforated terminating element with said extension, with said double diaphragm of said second one-piece structural part being molded onto said extension. 3. The dispenser drain attachment according to claim 1, wherein said double diaphragm is made of an elastic, injection-moldable rubber material. 4. The dispenser drain attachment according to claim 1, wherein said drain socket of said first one-piece structural part and said drain tube of said second one-piece structural part are injection-molded from a polyolefin. 5. The dispenser drain attachment according to claim 4, wherein said polyolefin is a member selected from the group consisting of polypropylene, polyethylene and polyamide. 6. The dispenser drain attachment according to claim 1, wherein said double diaphragm and said elastic gas bellows are injection-molded from a thermoplastic elastomer. 7. The dispenser drain attachment according to claim 1, further comprising a receiving collar molded around said drain socket on said threaded cap, said receiving collar having a recess extending entirely around its inner wall, with a bulge extending entirely around an upper edge of a mouth of said drain tube and fitting into said recess. 8. The dispenser drain attachment according to claim 1, wherein said lateral receiving sleeve includes a bulging inner edge with a retaining ring connected with said lateral receiving sleeve via said film hinge comprising an inserting collar with a bulging outer edge, so that said retaining ring is clipable onto said lateral receiving sleeve in a sealing manner so that said inserting collar of said retaining ring is able to fit tightly into said lateral receiving sleeve. 9. The dispenser drain attachment according to claim 8, wherein said retaining ring is pivotable by 180° onto said lateral receiving sleeve and tightly clipped onto said lateral receiving sleeve. 10. The dispenser drain attachment according to claim 1, wherein said means for attaching said first one-piece structural part to said second one-piece structural part includes tightly plugging said first one-piece structural part with said second one-piece structural part. 11. A method for manufacturing a dispenser drain attachment, said dispenser drain attachment including:a first one-piece structural part forming a threaded cap with a tapering drain socket having an extension and a double diaphragm with deformable diaphragm disks on said extension, said first one-piece structural part being made in an injection molding procedure;a second one-piece structural part forming a drain tube for receiving said double diaphragm for sealing said drain tube, said second one-piece structural part further including an elastic gas bellows for dispensing a flowable media by alternately deforming said deformable diaphragm disks of said double diaphragm as one-way valves resulting from changed pressure conditions occurring when said elastic gas bellows is deformed via compression and release, said second one-piece structural part being made in an injection-molding procedure; and,means for attaching said first one-piece structural part to said second one-piece structural part, said means for attaching being formed as an integral part of at least one of said first one-piece structural part or said second one-piece structural part,said dispenser drain attachment comprising of said first one-piece structural part and said second one-piece structural part with each of said one-piece structural parts made via two-component injection molding comprising a first component and a second component, whereas said second component for said double diaphragm with its said deformable diaphragm disks and for said elastic gas bellows being a softer and more flexible material than said first component for said threaded cap with said tapering drain socket and for said drain tube, there being a lateral receiving sleeve shaped on an outer side of said drain tube, said lateral receiving sleeve merging on one side into a film hinge, onto which a retaining ring with an inserting collar is molded, said inserting collar being capable of being tightly clipped into said lateral receiving sleeve,said method comprising the steps of:(a) a two-component injection-molding procedure for making said first one-piece structural part;(b) a two-component injection-molding procedure for making said second one-piece structural part; and,(c) attaching said first one-piece structural part to said second one-piece structural part to complete manufacture of said dispenser drain attachment. 12. The method for manufacturing a dispenser drain attachment according to claim 11, wherein said tapered drain socket of said threaded cap of said first one-piece structural part has a perforated terminating element with said extension, with said double diaphragm of said second one-piece structural part being molded onto said extension. 13. The method for manufacturing a dispenser drain attachment according to claim 11, wherein said double diaphragm is made of an elastic, injection-moldable rubber material. 14. The method for manufacturing a dispenser drain attachment according to claim 11, wherein said drain socket of said first one-piece structural part and said drain tube of said second one-piece structural part are injection-molded from a polyolefin. 15. The method for manufacturing a dispenser drain attachment according to claim 14, wherein said polyolefin is a member selected from the group consisting of polypropylene, polyethylene and polyamide. 16. The method for manufacturing a dispenser drain attachment according to claim 11, wherein said double diaphragm and said elastic gas bellows are injection-molded from a thermoplastic elastomer. 17. The method for manufacturing a dispenser drain attachment according to claim 11, further comprising a receiving collar molded around said drain socket on sai d threaded cap, said receiving collar having a recess extending entirely around its inner wall, with a bulge extending entirely around an upper edge of a mouth of said drain tube and fitting into said recess. 18. The method for manufacturing a dispenser drain attachment according to claim 11, wherein said lateral receiving sleeve includes a bulging inner edge with a retaining ring connected with said lateral receiving sleeve via said film hinge comprising an inserting collar with a bulging outer edge, so that said retaining ring is clipable onto said lateral receiving sleeve in a sealing manner so that said inserting collar of said retaining ring is able to fit tightly into said lateral receiving sleeve. 19. The method for manufacturing a dispenser drain attachment according to claim 18, wherein said retaining ring is pivotable by 180° onto said lateral receiving sleeve and tightly clipped onto said lateral receiving sleeve. 20. The method for manufacturing a dispenser drain attachment according to claim 11, wherein said means for attaching said first one-piece structural part to said second one-piece structural part includes tightly plugging said first one-piece structural part with said second one-piece structural part.