Animal size sorting and control gate
US4019464A · kind A · utility
Inventor
Key dates
| Filing date | Jun 7, 1976 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Jun 7, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K1/0023
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An animal size sorting and control gate for efficient operation in a number of operative modes permitting passage in a single direction, passage in both directions or passage in either direction. A pair of width limiters, each having a pair of horizontally disposed arms and a vertical rail extending between the arms, are pivotable with respect to horizontally disposed frame members. A plate underlying an upper horizontal frame member has a plurality of apertures arranged in circular arcs about either side of the frame members for alignment with an aperture in one of the arms of the width limiter to selectively fix the operating position of the width limiters by placing a pin through the aligned apertures. A space between the vertical rails of the width limiters determines the maximum size of animals which may pass therethrough. A pair of doors are hingedly connected to a pair of vertical frame members such that the doors span most of the area in the vertical direction between the arms of the width limiters, and in the horizontal direction between the vertical frame members and the vertical rail of the width limiters when the width limiters are pivoted into a generally co-planar rel…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.