Swivel plate device

Details Swivel plate device Swivel plate device

1997-09-02

1998-07-14

Nelson, Jr., Milton

Chairs and seats

Movable bottom

Bottom and back movable as a unit

2483491, A47C 102, A47B 9100

Patent

active

057793093

ABSTRACT:
A swivel plate device has a base plate, a rotating plate disposed on the base plate, and a cover covering the rotating plate. The base plate has a center hole, an annular groove, an annular protuberance, and positioning holes. A chain-shaped ring has round holes. A plurality of balls are inserted in the round holes. The rotating plate has a central through hole, a plurality of oblong holes, an annular recess, an annular protrusion, an annular channel and a post. A rivet passes through an annular bearing, the central through hole, and the center hole. A pillar is disposed on the rivet. A spring has a first end hook hooking the pillar and a second end hook hooking the post. A rim of the cover is inserted in the annular recess. The chain-shaped ring is inserted in the annular groove and the annular channel.

REFERENCES:
patent: 3199826 (1965-08-01), Miller et al.
patent: 4659050 (1987-04-01), Tabayashi
patent: 4705256 (1987-11-01), Hofrichter
patent: 4844543 (1989-07-01), Ochiai
patent: 5622343 (1997-04-01), Morton

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