INNER SEAL COLLAR WITH IMPROVED LOCKING MECHANISM

摘要

The invention is an inner seal collar for inserting into pipes in order to seal leakage points in said pipes, comprising an expandable strip which is bent into the shape of a ring and which is preferably made of steel sheet, parts of said strip at least partly overlapping in the circumferential direction, and comprising a locking device which has at least two parallel rows of teeth, wherein a separate clamping pinion engages into at least two of the rows of teeth. The invention comprises a separate blocking pinion paired with each of the at least two clamping pinions, said blocking pinion pushing against the corresponding clamping pinion via a respective spring element and being engaged with said clamping pinion, and each of the blocking pinions is also engaged with the corresponding row of teeth.

主权项

1. An internal sealing collar for insertion into pipes to seal leak points in the same, comprising a belt which is compressed circularly and can be expanded, made of sheet steel, the belt parts overlap in the peripheral direction at least partially, and having an arresting device which comprises at least two rows of teeth which are arranged parallel to each other, wherein one tensioning pinion for each of at least two of the rows of teeth engages in the same, further comprising wherein one locking pinion is functionally assigned to each of the at least two tensioning pinions, each locking pinion pressing against the associated tensioning pinion via one spring element each, and engaging with the same, and wherein each of the locking pinions additionally engages with the associated row of teeth.