Door system for large primate caging
US4953500A · kind A · utility
8Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K1/035
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A door system for an opening separating two areas that contain a primate with the primate being able to control by switches connected to the operating system for opening and closing the door to dictate his ingress and egress between the areas. The caretaker can override the switches controlled by the primate. A hydraulically driven piston, operable through a fluid control cylinder containing a spool valve, raises and lowers the door to close and open the opening. Fluid exhausted from the system by the movements of the piston is discharged upon the floor of one of the areas to keep it clean.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.