Nest trap for laying hens
US4889076A · kind A · utility
3Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 6, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | May 6, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K31/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A trap for a laying hens nest movable by the hen when entering the nest to a closed position obstructing the front entrance to prevent another hen from entering, and when leaving the nest to an open position to permit another hen to enter the nest. The trap is pivotably mounted to an intermediate position at the top of the nest between its front entrance and the back wall, and comprises a front member pivotably mounted to the intermediate position at the top of the nest, a back member mounted to the upper end of the front member, and an over-center spring connection between the two members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.