Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Patent
1985-02-12
1987-08-11
Houco, Thomas S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Head driving structure
411403, 411407, 411427, 411378, 81 5729, F16B 2300, F16B 3506
Patent
active
046858482
ABSTRACT:
A rotatable fastener has a head portion with an axially facing ring gear engageable with a complementary gear of a drive tool. In a preferred embodiment, the ring gear is a rearwardly facing beveled gear for use with a beveled drive gear and the head portion defines a forwardly directed thrust surface engageable by a bearing surface of the drive tool to urge the drive gear against the ring gear. In another embodiment, the fastener has a telescoping structure in which an internally threaded torque element is slidably received within a central passage of the head portion.
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Dino Suzanne L.
Houco Thomas S.
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