Joints and connections – Articulated members – Lockable at fixed position
Patent
1978-02-09
1979-01-16
Kundrat, Andrew V.
Joints and connections
Articulated members
Lockable at fixed position
403374, 280 1137F, 2481885, F16B 710
Patent
active
041347030
ABSTRACT:
This invention relates to a locking structure for a pair of extensible or telescopic poles in which one of the poles has an upstanding bolt secured therein, carried on the bolt are a pair of frusto conical members having their tapered portions in facing engagement and being moveable along of the bolt, disposed between said frusto conical members is a split ring having angled or beveled inner surfaces corresponding to the adjacent tapered faces of said frusto conical members and an expandible nut threaded onto said bolt having a body portion compressible to have a pressure fit within the other of the poles and a locking washer holding the same onto said bolt whereby the rotation of pole in which the expanding member is disposed will move said expanding member downwardly of said bolt causing the frusto conical members to move toward each other thereby expanding the split ring therebetween causing the split ring to move outwardly into locking engagement with the adjacent wall surface of the first mentioned pole.
REFERENCES:
patent: 1461767 (1923-07-01), Weyrauch
patent: 2456205 (1948-12-01), Magder
patent: 2503997 (1950-04-01), Miller
patent: 2508039 (1950-05-01), Neuwirth
patent: 2533733 (1950-12-01), Jensen
patent: 2542967 (1951-02-01), Waechter
Gregory Leo
Kundrat Andrew V.
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