Automatic pendulum-drive system
US5833545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Aug 28, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47D9/057
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A swing includes a swing motor and an adaptive control system for periodically actuating the swing motor to sustain swinging pendulum movement of a seat along a swing arc in a manner that is compatible with the natural frequency (and period) of the seat. The swing further includes a support stand and a swing seat frame mounted on the support stand to carry the seat. The adaptive control system includes an impulse mechanism that applies a torque to the swing seat frame and that is actuated at a variable point along the swing arc between first and second extreme positions and without regard to the position of the swing seat frame relative to the support stand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.