Dual drive mechanism and related methods

Details Dual drive mechanism and related methods Dual drive mechanism and related methods

1993-01-15

1995-06-27

Foss, J. Franklin

Supports

Pipe or cable

Extending through plate

74459, 248405, 29734412, F16M 1100

Patent

active

054273374

ABSTRACT:
A dual drive mechanism for medical/dental chair comprising a single motor drive and a pair of linearly driven shafts. In one embodiment, the dual drive mechanism provides a self-locking, reliable and easily maintainable system for vertically displacing one portion of a medical/dental chair relative to another portion of the medical/dental chair. In other embodiments, the dual drive mechanism drives both shafts in a single direction to increase drive power, engages each shaft to a common part and drives both shafts in opposite directions to tilt or rock the common part and employs shafts having different drive ratios to drive separate parts at separate rates.

REFERENCES:
patent: 597621 (1898-01-01), Russell
patent: 1242109 (1917-10-01), Koken
patent: 2152518 (1939-03-01), Wolf
patent: 2924265 (1960-02-01), Himka
patent: 3643521 (1972-02-01), Nilsson
patent: 4000874 (1977-01-01), Finley
patent: 4509382 (1985-04-01), Colautti
patent: 4576352 (1986-03-01), Ogden
patent: 4752102 (1988-06-01), Rasmussen
patent: 4842233 (1989-06-01), Rusin
patent: 5078357 (1992-01-01), Mosetich

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