Motorized swing
US4150820A · kind A · utility
45Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47D13/105
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A child's motorized swing includes a frame from which a seat is suspended by spaced-apart hangers pivotally connected to the frame so that the seat and its occupant can swing like a pendulum. A battery operated drive unit mounted on the frame adjacent one of the hangers rotates a small crank situated adjacent the hanger. A resilient, lost motion linkage connected between the hanger and the rotating crank applies reinforcing impulses to the hanger which maintain the weighted seat in oscillation at its natural frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.