Patent ID: 8147460

Claim:
An administering device for infusion or injecting a product, comprising: a receiver for the product, a conveying mechanism for conveying the product, a control element, and a first housing shell, which forms the receiver for the product and accommodates the conveying mechanism and the control element, the first housing shell comprising: a transparent, watertight wall region made from a first plastic material, a dimensionally stable shell structure made in an injection mold from a different, second plastic material, which forms the side walls of the first housing shell and incorporates a first opening closed by the transparent wall region and a second opening for the control element, and a flexible, watertight wall region, made from a third plastic material, which closes the second opening and overlaps the control element, wherein a pre-molded insert part forms the transparent wall region, and the shell structure and the pre-molded insert part are joined in a watertight fit, the watertight fit formed by the second plastic material being injected along an edge of the first opening so that the first plastic material and the second plastic material are joined along the edge of an injection mold formed seal, and wherein the flexible wall region and the shell structure are joined in a watertight fit, the water tight fit formed by the third plastic material being injection molded onto the second plastic material in the injection mold so that the third plastic material and the second plastic material are joined to one another along an edge of the second opening by an injection mold formed seal, and wherein the first housing shell has a third opening through which the components can be inserted in the first housing shell when the administering device is being assembled, and a seal gap which extends around the third opening, the device further comprising a second housing shell comprising a dimensionally stable support structure providing an anchoring element and a seal with a sealing lip made from a thermoplastic elastomer injection which is molded both over the second housing shell to surround the anchoring element and into the seal gap of the first housing shell, such that the housing shells are connected in a watertight fit.