| DOUGLAS L. HOLLAENDER ENTERPRISES, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100281670 | TUBE REPAIR INSERT - A tube can be repaired from its interior surface by inserting into the tube a cylindrical repair member The cylindrical repair member is a memory metal which has a first martensitic size that is less than the internal diameter of the tube, and a second austenitic size that is at least as large as or larger than the internal diameter of the tube. The cylindrical repair member is inserted into the tube in the martensitic state and heated, causing it to revert to the austenitic state thereby expanding and covering said hole, forming a tight bond with the internal surface of the tube. | 11-11-2010 |
| 20090272465 | MEMORY METAL PLUG WITH EXTENDED SHAFT - A memory metal plug adapted to seal tubes includes a central shaft and a plurality of discs extending radially from said shaft. The shaft extends beyond the first and last disc. The juncture of the discs and the shaft is radiused, and, further, the thickness of the discs decreases near the perimeter of each disc. This allows the discs to be swaged significantly without breaking, which, in turn, facilitates their use in plugging tubes. | 11-05-2009 |
