Grindex was founded in 1940 by two Swedish engineers. Among its earliest products was a rock grinding machine: this established the firm in the mining and construction markets; however when co-founder Börje Kristensson was out selling the grinding machine, he came across a new product on the market, a submersible drainage pump. The problem with submersible pumps in the early 1960s was that they were heavy and could not run dry. Kristensson set about developing a lightweight pump that could run dry, thanks to a patented air valve.
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