Poland's Piotr Lisek celebrates after winning in the Men's pole vault during the IAAF Diamond League competition on July 12, 2019 in Monaco. (Photo by Eric Gaillard/Reuters)
A dancer sanitizes the pole before performing on the outside patio at Cheerleaders Gentlemen's Club in Gloucester City, New Jersey, U.S. July 17, 2020. (Photo by Rachel Wisniewski/Reuters)
Australia's Nina Kennedy competes in the women's pole vault final at a Diamond League event in Florence, Italy on June 2, 2023. (Photo by Remo Casilli/Reuters)
Klemens Torggler's door is an invention based on rotating squares, The special construction makes it possible to move the door sideways without the use of tracks. This technical trick opens up new applications for the door.