A hydraulic ram is a clever device invented over 200 years ago that can pump water uphill with no other external source of power except for the water flowing into it and there is a way to take ...

But you have to admit that a pump that works without any apparent energy inputs looks kind of shady at first glance. The apparatus in question is a ram pump, a technology dating back all the way ...

BESTOOL Air actuated hydraulic treadle pump internal pressure relief valve for overload protection, prevent oil leakage.The convenient 2-stage release mechanism gives fast or metered ram return ...