Screw fixing plug
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 12, 1998
Grant Date -
N/A
app pub date -
Oct 11, 1996
filing date -
Oct 17, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A screw fixing plug which makes it possible for a screw to be fastened in position with its threads biting into the trunk of the plug over the entire length thereof, irrespective of the material of the member to which a screw is fastened is made. The plug has a trunk formed with a screw inserting bore and a composite hole comprising a sector portion and a groove-shaped portion. The trunk has two rib portions defined on both sides of the groove-shaped portion. When a screw is driven into the plug with the plug inserted in a starting hole formed through an article to be fastened and a building material, the portion of the trunk where the composite hole is formed is expanded uniformly. Thus, the threads on the screw will bite the trunk over the entire length thereof irrespective of the kind of building material, so that the screw can be fastened securely.
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