Squirrel-proof bird feeder
US4523546A · kind A · utility
48Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Jan 4, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K39/0113
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A device for squirrel-proofing bird feeders includes a flexible covering sheet mounted above or to the upper end of the bird feeder. The sheet is dimensioned and located with respect to the feeder so that when a squirrel attempts to walk on the sheet, the sheet will flex and bend downwardly under the influence of the squirrel's weight. The squirrel will slide off the sheet and with no means or opportunity to grab onto any portion of the sheet or the feeder which it covers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.