Screw grommet

Details Screw grommet Screw grommet

1979-11-13

1981-10-06

Britts, Ramon S.

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

Having separate expander means

Including sleeve and distinct tapered expander

411111, F16B 1306

Patent

active

042932602

ABSTRACT:
In a screw grommet of the type composed of a head portion, a barrel portion extended downwardly from the head portion, and a continuous axial cavity through the head portion and the barrel portion and possessed of an inside diameter smaller than the diameter of screw means destined to be driven into the cavity, the barrel portion is provided thereon with angular portions which are adapted to match to the corners in a polygonal fitting hole punched in a panel for insertion of the grommet and are connected through the medium of hinges to the remaining part of the barrel portion. In the screw grommet, the force generated by the screw means being driven into the axial cavity inside the barrel portion causes the angular portions of the barrel portion to be outwardly expanded and pressed against the corners of the fitting hole without being rotated with the screw means, enabling the grommet to be secured strongly to the panel.

REFERENCES:
patent: 3352195 (1967-11-01), Fisher
patent: 3358551 (1967-12-01), Seckerson
patent: 4077300 (1978-03-01), Yoda
patent: 4082030 (1978-04-01), Erickson

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