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Class Information
Number: 185/43
Name: Motors: spring, weight, or animal powered > Spring > With winding means > With overwinding preventer
Description: Spring motors having means for preventing the overwinding of the springs.

Patents under this class:

Patent Number Title Of Patent Date Issued
6431317 Rotary electric actuator with a mechanical spring return back-up Aug. 13, 2002
6283870 Motor mechanism for child's swing Sep. 4, 2001
6123140 Spring device for rolling up a roller curtain Sep. 26, 2000
6098757 Spring drive assembly Aug. 8, 2000
5788014 Motor mechanism for child's swing Aug. 4, 1998
5386884 Spring assemblies Feb. 7, 1995
5358073 Method and apparatus for tensioning an accumulator spring of a drive of a high-voltage or medium-voltage power circuit breaker Oct. 25, 1994
4832155 Power transmission device May. 23, 1989
4762202 Elastic energy storing device Aug. 9, 1988
4719992 B-motor with floating locking plug Jan. 19, 1988
4621789 Electrically driven valve Nov. 11, 1986
4479356 Elastomeric energy recovery system Oct. 30, 1984
4429729 Window shade clutch assembly Feb. 7, 1984
4260041 Toy energy supply device Apr. 7, 1981
4235419 Storing device for a cable fixed on either of its ends Nov. 25, 1980
4135329 Vehicle with spring motor operable in running and rewind modes Jan. 23, 1979
4104927 Engine starter Aug. 8, 1978
4096842 Device for winding a spiral spring to start an engine Jun. 27, 1978
4067243 Engine starting device for a motorcycle Jan. 10, 1978

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