| 20120018107 | PORTABLE VENTILATION CURTAIN FRAME - A support for an air ventilation control curtain includes a foldable support rod comprising a plurality of rigid hollow rod sections that are movable with respect to each other, a coupling for joining an axial end of one of the rod sections to an axial end of another one of the rod sections, an attachment device slidably mounted on the support rod so as to be movable along a length of the support rod, the attachment device adapted for engaging with a roof plate of a mine roof, and a curtain hanger disposed on the support rod for hanging an air ventilation control curtain from the support rod. | 01-26-2012 |
