Pneumatic self-sealing female coupling incorporating combination locking tumblers
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United States of America Patent
Stats
-
May 12, 1987
Grant Date -
N/A
app pub date -
Sep 2, 1986
filing date -
Sep 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides an improved, self sealing, female pneumatic coupling of the type that releasably engages a grooved nipple attached to a pneumatic tool or fixture. The conventional elements of the female coupling include a ball bearing latch that prevents removal of the grooved nipple when activated and a locking sleeve to activate the ball bearing latch. The improvement of the present invention, in a preferred embodiment, includes locking sleeve having separable segments to form a set of first, second and third combination locking tumblers each of annular configuration. A set of numbers is provided on the outer periphery of each of the tumblers. Each of the tumblers must be rotated so that a selected number thereof is opposite to an index before the locking sleeve can be moved to deactivate the ball bearing latch. As a result, removal of the tool or fixture attached to the grooved nipple is prevented by unauthorized persons not knowing the combination of the selected numbers of the locking tumblers.
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