HEINTZMANN CORPORATION Patent applications |
Patent application number | Title | Published |
20140314490 | PUMPABLE MINE VENTILATION STRUCTURE - A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls are closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag. | 10-23-2014 |
20130263673 | METHOD OF QUALITY CONTROL FOR DETERMINING THE COMPRESSIVE STRENGTHS OF GROUT IN MULTIPLE MOLDS - A method for testing compressive strength of multiple molds filled with a liquid settable grout wherein samples of the liquid settable grout are taken at selected filling intervals and poured into a container, and the container is sealed and the time, date and location information regarding the mold then being filled is recorded on the container. The sample container is then left in the same environment as the mold being sampled. A curve is generated which projects a final compressive strength based on compressive strengths at various cure times. The sample is removed from its container after a selected cure time and subjected to a series of Schmidt hammer tests, and these compressive strength readings are used to determine the projected final compressive strengths of the sample based on the cure time from the established curve. | 10-10-2013 |
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 |