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A Business Out of Manholes

August 27, 2009 by Dane Carlson | 1 Comment

Business Week:

Opening manhole covers, which weigh up to 400 lbs., is difficult at best and dangerous at worst. Dave Roberts, 51, who spent 25 years lifting them while working for waste-water authorities in Minnesota’s Twin Cities, decided to find a better way. A perpetual tinkerer, Roberts designed a machine to remove the heavy cast-iron lids using a powerful magnet and a hydraulic hoist that attaches to a back of a vehicle. He assembled the first device in his garage five years ago and sold seven of them to his employer.

In Profiles | 1 Comment

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Comments

  • Jaclyn Wells on August 28th, 2009 1:17 pm

    I bet city workers just love this idea! I have always wondered how heavy those things are, because you always see workers struggling to get them out of the road.

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