Abstract: The invention is an expanding, anchoring screw, made of expandable polymer material. The screw shaft is hollow. After inserting screw in a material, by allowing two reagents to mix in the hollow shaft, and a polymerization chemical reaction to occur, the reagents increase in volume exerting pressure against the inner surface of the hollow shaft, expanding the shaft, and applying greater anchoring force against material in which the screw is inserted.
Abstract: The invention herein disclosed is a system that supports sampling, testing and filtering of air in selected small volumes of air within a larger air pool.
Abstract: The invention is an expanding, anchoring screw, made of expandable polymer material. The screw shaft is hollow. After inserting screw in a material, by allowing two reagents to mix in the hollow shaft, and a polymerization chemical reaction to occur, the reagents increase in volume exerting pressure against the inner surface of the hollow shaft, expanding the shaft, and applying greater anchoring force against material in which the screw is inserted.