Patent ID: 9694936
Date: 2017-07-04
CPC Classifications: B65D,B66C,B66F

Claim:
1. A jack unit for releasably attaching a load-bearing skate to an object to be moved, the skate having at least two rolling elements and the object being provided with a coupling slot having slot bearing surfaces that extend parallel to a horizontal axis and a slot latching structure, the jack unit comprising: a jack housing; an extendable element that is forcibly movable relative to said jack housing along a vertical lift axis; a tongue affixed with respect to said jack housing so as to extend along a horizontal tongue axis and having, means for retracting said tongue latching structure from engagement with the slot latching structure, thereby allowing the jack unit to be removed from engagement with the coupling slot while the coupling slot remains secured to the object; and skate attachment means for lockably attaching the skate to said extendable element so as to vary a separation of the skate from said jack housing measured along the lift axis as said extendable element is forcibly moved relative to said jack housing.