Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1995-05-25
1996-10-22
Bryant, David P.
Metal working
Method of mechanical manufacture
Assembling or joining
29506, 29523, B21D 3900
Patent
active
055664407
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention pertains to a method for the fabrication of an outflow element, which outflow element is composed of an outlet pipe possessing two or more bulges projecting inwardly, a plate equipped with a hole with a diameter which is smaller than the diameter of the outlet pipe, and a clamping tube to be permanently fixed together.
The invention further pertains to a method for the fabrication of an outflow element, which outflow element is to be composed of an outlet pipe equipped at one end with a bluge projecting outwardly which is protruding from the entire circumference of the outlet pipe, a plate equipped with a hole and a protruding collar along the circumference of the hole, whereby the external diameter of the collar is approximately the same as the internal diameter of the outlet pipe, and a clamping tube to be permanently fixed together.
BACKGROUND OF THE INVENTION
Outflow elements, or lower outlet pipes, are in part used to drain rain-water from flat roofs and typically into a sewer system.
Many of the outflow elements are fabricated from a lead plate within which a hole for the affixation of the end of a lead pipe has been made. By means of soldering or welding with the aid of lead, the pipe is sealed in a water-tight manner to the hole and the other end of the pipe is connected via an adapter to the drainage pipes, which drainage pipes are usually fabricated from PVC. Outflow elements having a single moulded lead entity are also known. Further, outflow elements made from other materials are known, such as those having a plate of the roof-covering material and a stainless steel outlet pipe, which plate and outlet pipe are sealed together in a mechanical manner. In general, the lead plate can be modified to the contours of the roof in situ by hand or with the use of light tools, and subsequently covered with a suitable roof-covering.
The known method suffers from the disadvantage, in particular in the in-situ situation where the outflow element is affixed to the roof, that it is laborious and furthermore requires the usage of heavy lead plates and tools which must be brought to the place of work in question and cut to size there. The prior making of one or more outflow elements in a workshop results later, as a consequence of the transport thereof, in a lack of roundness namely in the other extreme of the pipe, whereby the connection with the drainage pipes to the sewer leaves much to be desired, and this cannot be made air-tight and odour-tight without the use of extra means of assistance.
From the European patent application EP-A-502493 a device for floor drains is known. This device has a re-modellable plate with a hole, an outlet pipe and a clamping tube. The plate and the outlet pipe are first coupled during fabrication of the device by a clamping tube in the form of a round bar spring. This bar spring must be compressed before use and then positioned properly.
SUMMARY OF THE INVENTION
The current invention aims to provide an improved method for the fabrication of such an outflow element, whereby the components of the outflow element are sealed to each other beforehand in a water-tight manner.
In accordance with the invention, the method for the fabrication of an outflow element composed of an outlet pipe possessing two or more bulges projecting inwardly, a plate equipped with a hole with a diameter which is smaller than the diameter of the outlet pipe, and a clamping tube permanently fixed together by: tool with a diameter greater than the hole diameter; and plate to the end of the outlet pipe, thereby widening and forming a collar around the hole and clamping the clamping tube to itself for pressing and holding the collar of the plate folded in the end of the outlet pipe to the bulges projecting inwardly.
In the fabrication of such an outflow element, the clamping tube does not have to be mounted during the forming of the collar; rather, the clamping tube can be pressed in to the collar at a later stage. In this manner, the demands on the form and the composite ma
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Schoormans Johannes A. H. M.
Van der Net Dirk
Bryant David P.
Johannes A. Schoormans
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