SCREW DOWEL FOR FASTENING RAILS
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United States of America Patent
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Issued Date -
Sep 5, 2013
app pub date -
Sep 21, 2011
filing date -
Sep 21, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Screw dowel for concreting into a railway sleeper or ballastless track and frictionally connecting to a sleeper screw, containing a threaded portion (14) with external thread flights (18) arranged on the outside of the screw dowel (10) and with internal thread flights (19) arranged on the inside of the screw dowel; and an upper subportion (16) without external thread that is situated close to the dowel opening (26) in the installed state; the screw dowel containing two constituent parts made of different materials, namely a basic body made of plastic and a cylindrical ring (20) made of a steel material and mounted with a form fit and/or force fit.
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Cited Art Landscape
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