Bird feeder
US5964183A · kind A · utility
41Cited by
14References
5Claims
0Family size
Inventor
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K39/0113
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A bird feeder having an inner feed containing tube with a removable top, fixed bottom and feed access openings therein, an outer tube shrouding the inner tube and having feed access openings therein and an upper and lower position. In the upper position the feed access openings in the inner and outer tubes are aligned and when the outer tube moves downwardly relative to the outer tube the access openings are closed. A lever is pivotally connected to the fixed bottom and operatively connected to the outer tube. A biasing element urges the lever to pivot in a direction to move the outer member to its upper position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.