Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Casters – Locked
Patent
1986-07-18
1988-03-22
Silverberg, Fred
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Casters
Locked
16 44, 16344, B60B 3302
Patent
active
047318996
ABSTRACT:
The present invention is related to a rotary roller set directional control device, particularly to a rotary roller set device, which is characterized by a novel design wherein two opposite longitudinal positioning slots are positioned at the upper section of a pivotal shaft socket, a pivotal supporting arm with a U-shaped rocker of which the front end is provided with a suitable catch key extended downward. The rocker may swing downward to assemble with the upper section of pivotal shaft socket and insert the catch key in the positioning slot. An annular flange on the top edge of pivotal shaft socket is designed to decrease the contact area between the pivotal supporting arm and the pivotal shaft socket when rotating the pivotal supporting arm to change the catch direction of U-shaped rocker so as to lower the frictional resistance. A positioning column and an elastic element are in a long shaft hole on the rear end of a roller seat for controlling the pivotal shaft socket to make its direction stable and to make the change of its direction easy as well as to make it shock-proof effective.
REFERENCES:
patent: 4483042 (1984-11-01), Dieter
patent: 4575896 (1986-03-01), Nakao et al.
patent: 4608729 (1986-09-01), Huang
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