Invention of the Hydraulic Slipform Jack

The first experiments with a hydraulic slipform jack was performed 1943. The lifting equipment consists of a number hydraulic jacks, connected to an oil pressure pump. The pump is calculated to serve up to 75 jacks and can be controlled and operated by a single person.
Patent registered to Erik von Heidenstam and Emrik Lindman, AB Byggförbättring, 1944.

The invention of the jack was soon followed by the elaboration of a series of other ancillaries, such as a universal yoke and steel form, which can quickly be assembled and dismantled. This fully mechanised and fully automatic slipform technique became known as “the Concretor-Prometo System” or “the Swedish Slipform Method”.

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