Joints and connections – Including ancillary means blocking disconnection of joint – Cam or thread lock
Patent
1981-08-17
1983-10-11
Shedd, Wayne L.
Joints and connections
Including ancillary means blocking disconnection of joint
Cam or thread lock
285 92, 411148, 411134, B25G 300, F16D 100, F16G 1100
Patent
active
044089279
ABSTRACT:
A resilient holding device comprising a looped helical spring or a closed loop of interconnected essentially circular disc elements confined to an annular cavity circumferentially within a threaded joint or coupling. By tightening the threaded joint or coupling such as to engage the confined spring, a latching effect is created that requires a reverse torque for disassembly that exceeds the torque required to tighten. Such a torque biased threaded coupling is particularly useful in oil field applications.
REFERENCES:
patent: 2129704 (1938-09-01), Meyer
patent: 3390900 (1968-07-01), McCormick et al.
patent: 3880451 (1975-04-01), Kinzbach
patent: 4165194 (1979-08-01), Flower
Gearhart Industries, Inc.
Shedd Wayne L.
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