Electro-magnetically controlled pet door
US6453847B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Apr 27, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B7/32
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electro-magnetically controlled pet door having a door (1) pivotally mounted in a door aperture (17) of a frame (2) and an electrically controlled catch mechanism normally preventing opening of the door in at least one direction that is released when a magnet (30) carried by an animal approaching the door is sensed by two or more reed switches (23,24) on or in the frame mounted and connected electrically in parallel. The switches (23,24) are disposed in an array extending circumferentially of said door aperture and have normally open contacts and magnetic biasing means (26,27) are associated with the reed switches and positioned laterally thereof to increase their sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.