Screw head cover

Details Screw head cover Screw head cover

1977-11-10

1978-12-12

Bonck, Rodney H.

85 52, A47G 300, F16B 1502

Patent

active

041290607

ABSTRACT:
A self closing cover for the head of a screw is integrally formed of a resilient polymeric resin and includes a flat annular washer having upwardly projecting closure flaps along its periphery and connected to the washer for swinging to interfitting dome defining positions overlying the washer. A flap closing finger depends from each of the closure flaps and with the tightening of the screw toward a work surface, the work surface bears on and swings the fingers to swing the flaps to their closed positions.

REFERENCES:
patent: 1613921 (1927-01-01), Berge
patent: 3396434 (1968-08-01), Overhoff
patent: 3538557 (1970-11-01), Hirose
patent: 3769664 (1973-11-01), Parera
patent: 3882752 (1975-05-01), Gutshall
patent: 4023758 (1977-05-01), Yuda

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