Automatic latch door apparatus
US4043079A · kind A · utility
Inventor
Key dates
| Filing date | Dec 2, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Dec 2, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B7/32
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Door apparatus having spaced panels forming a closure and hanging in a vertical closing position and hung to swing back and forth as a unit, a latch mounted on the inner surface of each panel near the lower edge thereof and engaging a stop to prevent movement of the panel away from the other panel while permitting movement towards said other panel, and operating means on each panel operatively connected to the latch thereof. When either panel is swung towards the other panel it engages the operating means of the latter to operate the latch thereof to disengage its stop, thereby allowing the panel unit to swing out of the closing position. This invention relates to door apparatus which is normally latched in a closed position and which is unlatched to allow the door apparatus to move in either of opposite directions to an open position merely by the application of pressure against either of the two outer faces thereof. Although this door apparatus was primarily designed to act as door for pets, and is so described herein for convenience, it may be used for other purposes. The door apparatus for pets is preferably hung from the top thereof, but it may be swingably mounted at one side…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.