Apparatus for lining an inner face of tubular culverts having arbitrary cross section
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Dec 22, 1998
filing date -
Jan 22, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
lining apparatus deals with tubular culverts having various cross sections which are not limited to a general cross section of a circular shape but may be constituted by an oval shape, a rectangular shape or another polygonal shape and the like. The lining apparatus inserts a tubular body (lining pipe) formed by spirally winding a strip member having a long sheet-like body at an inner face of an existing tubular culvert such as a sewage pipe, a water supply pipe, a gas pipe or the like. The lining apparatus is constituted mainly by a forming frame in a closed loop shape made flexible by a link mechanism having a series of links. A joint mechanism unit is attached to the forming frame and a peripheral length adjusting mechanism adjusts the peripheral length. An interval maintaining mechanism fixes the peripheral length. Rotary guides are mounted to the forming frame and a rigid regulating frame is brought into contact with the rotary guides and is arranged on the inner side of the forming frame. The strip member has plastic deformation performance. The lining pipe is formed in an arbitrary shape along the shape of the regulating frame.
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