Mechanism for maintaining a swinging movement
US4722521A · kind A · utility
28Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1985 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Sep 17, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47D13/105
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A swinging mechanism for maintaining pendular movement in a swing. A revolving plate is provided which engages a propulsion member on the swing so as to apply torque to the swing during part of the swing cycle, maintaining pendular movement of the swing despite energy loses due to air friction and the like. Switches are provided to activate rotation of the revolving plate when the swing has reached a rear position, and to continue movement of the revolving plate to return it to a neutral or original position in preparation for the next cycle of the swing movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.