Mine door system including an air pressure relief door
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 18, 2005
Grant Date -
Dec 30, 2004
app pub date -
Jun 27, 2003
filing date -
Jun 27, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A mine door of the present invention is adapted for installation in a mine passageway and includes a leaf adapted for swinging between a closed position and an open position. The leaf may be mounted in a frame, and a stopping wall may surround the frame. When closed, the leaf is subject to a differential in air pressure involving higher pressure on one of the faces of the leaf than on the other of the faces of the leaf. The leaf, the frame, or the stopping has an opening therein for passage of air therethrough from adjacent the one of the faces of the leaf to adjacent the other of the faces to more nearly equalize the pressure on the faces and thereby facilitate opening the leaf.
First Claim
Other Claims data not available
