Tunnel liner building method and building panels therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 28, 1995
Grant Date -
N/A
app pub date -
Jul 22, 1992
filing date -
Jul 22, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Tunnel liners are formed from panels of arched, bendable sheet material. The panels include a central portion, inclined side portions, wing portions, and hook and receptacle portions on opposite sides of each panel. Panels are joined with the hook portion of one panel fitting into the receptacle portion of the other panel and are then continuously seamed from the underside, i.e., the inside of the arched assembly.
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Cited Art Landscape
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