Ratchet driven threaded fasteners

Details Ratchet driven threaded fasteners Ratchet driven threaded fasteners

1989-05-02

1990-03-27

Lindsey, Rodney M.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Head driving structure

411407, 411919, F16B 2300

Patent

active

049115936

ABSTRACT:
A threaded fastener organization is set forth wherein an axially threaded shank includes an enlarged overlying head wherein the head is provided with a square prismatic recess formed through an upper surface of the head and wherein the recess is formed with planar walls, each aligned parallel to the axis of the threaded shank. Each wall includes a semi-spherical recess for reception and engagement with a detent sphere associated in a conventional ratchet driver.

REFERENCES:
patent: 288923 (1883-11-01), Cole
patent: 785449 (1905-03-01), Thompson
patent: 2169460 (1939-08-01), Broughton
patent: 2248695 (1941-07-01), Bradshaw
patent: 3283638 (1966-11-01), Ansingh
patent: 4272209 (1981-06-01), Joseph, Jr.
patent: 4277107 (1981-07-01), Stone

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