Horizontally supported planar surfaces – Power driven – Along circuitous path
Patent
1995-06-26
1996-12-10
Cuomo, Peter M.
Horizontally supported planar surfaces
Power driven
Along circuitous path
108 20, 476 64, 74625, A47B 1100
Patent
active
055821120
ABSTRACT:
There is provided an improved turntable structure wherein a turning plate may be motor-driven or manually driven at the option of a user. The turntable includes a turning plate supported on a base plate via a rotation ring assembly. On the bottom surface of the turning plate is mounted a driving device from which extends a tie rod by which the user may manipulate the position of a driving wheel in the motor of the driving device to engage or disengage from the rotation ring assembly. The rotation ring assembly includes an upper sleeve affixed to the bottom surface of the turning plate, a lower sleeve affixed to the top surface of the base plate, and a bushing circumferentially opposing both the upper and lower sleeves. A plurality of roller balls are captured in aligned grooves formed into opposing surfaces of each of the upper and lower sleeves and the bushing. During motor-driven operation, the motor's driving wheel is brought to bear against the interior surface of the ring-shaped bushing, whereby the turning plate and the upper sleeve fastened thereto rotate relative to the bushing, following the travel of the driving wheel along that bushing. When the user halts the turning table's motion by grasping it, the driving wheel continues to travel along the interior surface of the bushing; however, the bushing then rotates relative to the stationary upper sleeve. Upon the user's release of the turning plate, rotation of the turning plate resumes as before.
REFERENCES:
patent: 2875623 (1959-03-01), Babler
patent: 2902741 (1959-09-01), Hankin, Jr.
patent: 4028041 (1977-06-01), Zambrano, Jr.
patent: 4555990 (1985-12-01), Egawa
patent: 5152099 (1992-10-01), Nilssen
Cuomo Peter M.
Klein David I.
Rosenberg Morton J.
Wilkens Janet M.
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