Coil spring or friction-lock mechanisms
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United States of America Patent
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Sep 29, 1992
Grant Date -
N/A
app pub date -
May 11, 1990
filing date -
May 11, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanical lock of the type where as spring wound about a rod normally grips the rod against axial movement through a lock housing is improved by providing a lightly scored surface finish on contacting surfaces of the rod and the spring, the scoring being transverse to the rod and excluding contacting surfaces of adjacent coils of the spring for enhanced frictional resistance to axial sliding displacement of the rod through the spring while maintaining low friction unwinding of the spring.
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