Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Casters – Antifrictionally swivelled
Patent
1994-09-07
1996-01-02
Bradley, P. Austin
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Casters
Antifrictionally swivelled
16 26, B60B 3300
Patent
active
054796776
ABSTRACT:
A caster device for supporting a push cart includes a cap member having a flat top fixed to the push cart and a circular side wall. The circular side wall of the cap member has an inwardly curled lower edge. An inverted and truncated conical ring member has a curved side wall and a flange. A bowl-shaped rotary member is disposed below the ring member such that a horizontal flange thereof abuts the flange of the ring member. The side wall of the rotary member and the curved side wall of the ring member cooperatively define a first annular ball-receiving space. The horizontal flange and the side wall of the rotary member, and the inwardly curled lower edge of the cap member cooperatively define a second annular ball-receiving space. A plurality of steel balls are rotatably confined within the first annular ball-receiving space and the second annular ball-receiving space to permit rotation of the rotary member with respect to the cap member.
REFERENCES:
patent: 1392913 (1921-10-01), Chesnutt
patent: 1680446 (1928-08-01), Bowen
patent: 1736110 (1929-11-01), Beemer
patent: 1809609 (1931-06-01), Turner
patent: 1884142 (1932-10-01), Noelting
patent: 2947021 (1960-08-01), Black
patent: 3479680 (1969-11-01), Clinton et al.
patent: 4707880 (1987-11-01), Doyle et al.
Bradley P. Austin
Mah Chuck Y.
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