Motors: spring – weight – or animal powered – Spring – With winding means
Patent
1995-10-10
1997-10-14
Lorence, Richard M.
Motors: spring, weight, or animal powered
Spring
With winding means
16 64, 16 79, 16DIG10, 49386, F03G 100, E05F 108
Patent
active
056762224
ABSTRACT:
A device for generating a rotary return force includes a casing unit, driving and driven gear units disposed in the casing unit, and a torsion spring. The driving gear unit includes a driving axle mounted rotatably to the casing unit and a driving gear wheel mounted fixedly on the driving axle. The driving axle is adapted to be driven rotatably by a rotatable unit. The driven gear unit includes a driven axle mounted rotatably to the casing unit and a driven gear wheel mounted on the driven axle. The driven gear wheel meshes with the driving gear wheel. One of the driven and driving gear wheels is larger than the other one of the driven and driving gear wheels. The torsion spring has a first retaining end secured to the driven gear unit and a second retaining end secured to the casing unit. Rotation of the driving gear wheel in a first direction by the rotatable unit causes corresponding rotation of the driven gear wheel and winding of the torsion spring. Removal of a rotary force applied by the rotatable unit on the driving gear wheel causes the torsion spring to unwind and to drive rotatably the driven gear wheel and the driving gear unit in order to generate the rotary return force for rotating the rotatable unit in a second direction opposite to the first direction.
REFERENCES:
patent: 14583 (1856-04-01), Barton
patent: 2460270 (1949-02-01), Ashley et al.
patent: 3699608 (1972-10-01), Schwarz
patent: 4463831 (1984-08-01), Wakase
patent: 4912806 (1990-04-01), Orii et al.
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