Telescopic column pipe to be located in the ground

Details Telescopic column pipe to be located in the ground Telescopic column pipe to be located in the ground

E - Fixed Constructions

21

F

61/2.4

E21F 17/16 (2006.01) E03F 5/02 (2006.01)

Patent

CA 1233328

ABSTRACT The invention relates to a telescopic column pipe to be located in the ground, wherein an upper pipe element is provided with a top covering to be disposed substantially at ground level, and is displaceably received at a smooth portion thereof in a lower pipe element. The upper pipe element has an outside screw thread extending over at least part of the circumference of side pipe element. By rotating the upper pipe element this element can be moved up and down in relation to the lower pipe element solely by the cooperation of the screw thread with the surrounding ground material.

479833

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