1976-09-09
1978-11-28
Peshock, Robert
A61C 1902
Patent
active
041269390
ABSTRACT:
A dental appliance stand is provided with an equipment tray and remote-controlled positioning means for simultaneously rotating and vertically advancing the tray between an out-of-the-way position to one side of the patient chair and a use position directly over the patient chair. The positioning means includes a rotatable worm screw with a worm follower for imparting vertical movement to the tray and a guide cylinder with an elongated guide slot, a section of which has a helical pattern, for engagement with a guide pin extending radially from the worm follower to impart rotational movement to the tray. The worm screw is driven by an electric motor through a clutch mechanism to prevent jamming of components or burning of the motor or belts, and the tray is attached to the positioning means by a leveler mechanism which can be adjusted both to level the tray and to provide a safety slip engagement between the positioning means and the tray to prevent injuries in case a person should inadvertently get into the path of the tray while it is in operation.
REFERENCES:
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patent: 3880096 (1975-04-01), Kaplan
P.P.B. Enterprises
Peshock Robert
Reilly John E.
Young James R.
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