U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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Patent No. 6368227

Method of swinging on a swing

A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.

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Class 400/365 - HAVING ROTATED POWER DRIVE INTERMITTENTLY APPLIED FOR TYPE-BAR ACTUATION


Subclass of Class 400 - Typewriting machines
Definition: Subject matter wherein mechanical energy is used to turn
No. of patents: 1
Last issue date: 07/06/1976


NumberTitleIssue Date
3967715Intermittent drive system for typewriters
An intermittent drive for a single-element printing typewriter, calculator or similar machine. The drive comprises a drive shaft couplable via a cycle clutch to a driven shaft and a governor disposed on the driven shaft to couple it with and maintain it a... 		07/06/1976
 
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