Fail-safe slide fastener
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United States of America Patent
Stats
-
Jan 12, 1982
Grant Date -
N/A
app pub date -
Jan 7, 1980
filing date -
Jan 7, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A positively locking slide fastener assembly of the 'zipper' type includes two trains of locking elements or teeth with each of the teeth being provided with an interlocking hook-like extension and a locking surface. Adjacent teeth in each of the two trains are oppositely directed with the hooks pointing up and down, and opposed teeth in different trains have the teeth pointing up and down for interlocking of the opposed trains. The slider for securing the trains together and for unlocking them includes camming surfaces for tilting the opposed teeth to an unlocking position as the opposed trains are brought together or unfastened. In addition, a movable or adjustable pointed element may be provided to assist in the separation of the two trains as the slide fastener assembly is opened. Camming surfaces and the pointed opening element may be secured and put into operation by movement of the slider handle to its operative position.
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