Patent ID: 8079121

Claim:
A pressing device, comprising: a first movable member including an upper clamping element and a lower clamping element, the upper clamping element having a first fringe portion, a plurality of first latching grooves having different sizes defined in the first fringe portion, the lower clamping element having a second fringe portion, and a plurality of second latching grooves having different sizes defined in the second fringe portion; and a second movable member including an upper clamping element and a lower clamping element, the upper clamping element having a first fringe portion, a plurality of first latching grooves having different sizes defined in the first fringe portion, the lower clamping element having a second fringe portion, a plurality of second latching grooves having different sizes defined in the second fringe portion, each first latching groove of the second movable member having a same size as that of a corresponding first latching groove of the first movable member, and each second latching groove of the second movable member having a same size as that of a corresponding second latching groove of the first movable member, wherein the first latching grooves are evenly arrayed along a circle having a same center point as the upper clamping element, and the second latching grooves are evenly arrayed along a circle having a same center point as the lower clamping element.