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US 8,662,101 B2Granted
Device for inserting a shut-off device in a pipeline
AssigneeMertik Maxitrol GmbH & Co. KG
InventorsWerner Herrfurth, Thomas Vogt
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AssigneeMertik Maxitrol GmbH & Co. KG
InventorsWerner Herrfurth, Thomas Vogt
Estimating the term…
A device suitable for retrofitting in laid pipelines is intended to be able to be placed and fixed in place in the pipeline. Transport of the device to the installation location is intended to be performed using as little force as necessary, and the sealing element is intended to be displaced without contact and thus without wear. To this end, the device, in the interior of which a shut-off device (6) is disposed, is designed so that an offset, conically tapering region (10) is adjacent to a front cylindrical region (3) and is bounded by a stop collar (12) on which a connecting contour (7) for a coupling piece of a drive element is connected. A sliding piece (13) made of an expandable material is displaceably disposed in the axial direction on the conically tapering region (10), comprising a circumferential groove in which a spring-loaded clamping ring (15) is supported.
A device for inserting a shut-off device in a pipeline, characterized in that the device comprises a tubular housing (1) and a shut-off device (6) disposed in the tubular housing, and that the external diameter of the housing (1) in a front cylindrical region (3) looked at from the direction of insertion is smaller than the internal diameter of the pipeline (2), and that an offset region (10) conically tapering towards the direction of insertion is adjacent to the front cylindrical region (3), with said offset region bounded by a stop collar (12) on which a connecting contour (7) for a coupling piece (20) of a drive element (19) is connected, wherein a sliding piece (13) made of an expandable material, whose external diameter when lying against the stop collar (12) is smaller than the internal diameter of the pipeline (2), and which comprises a circumferential groove in which a spring-loaded clamping ring (15) is supported, is displaceably disposed in the axial direction on the offset region (10).
Dependencies are inferred from the claim text.