Motors: spring – weight – or animal powered – Composite – Spring only
Patent
1998-08-25
2000-08-08
Matecki, Katherine A.
Motors: spring, weight, or animal powered
Composite
Spring only
185 43, 185 45, 242372, 254364, F03G 102
Patent
active
06098757&
ABSTRACT:
A device is disclosed comprising (a) a first and second member in rotational alignment to each another; (b) a torsional resilient mechanism for providing torsional resilience between the first and second members, the torsional resilient mechanism comprising at least two or more coaxial helical springs connected in series with the inner-most spring connected to the first member and the outer-most spring connected to the second member; and (c) one or more stops for preventing at least one of said springs from winding or unwinding beyond a particular point.
REFERENCES:
patent: 470611 (1892-03-01), Wood
patent: 740114 (1903-09-01), Fiske
patent: 1258158 (1918-03-01), Sims
patent: 1581527 (1926-04-01), Yingling
patent: 2481037 (1949-09-01), Pringle
patent: 3384321 (1968-05-01), Becker et al.
patent: 3804407 (1974-04-01), Saint
patent: 5217208 (1993-06-01), Stephenson
patent: 5590741 (1997-01-01), Storms
patent: 5775619 (1998-07-01), Tabellini
International Paper Company
Matecki Katherine A.
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