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US 6,331,025 B1Granted
Barrier lifter
OwnerWilliam E. Douglasinventor
Life of this patent
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Abstract
A barrier lifter apparatus comprising a scissors structure having L-shaped clamping elements, a pair of L-shaped tongs, a bar connecting each of the tongs, a pair of linking elements, rods connecting the pair of tongs and the linking elements, and an apertured plate on the rod between linking elements for hoisting. The apparatus can be either semi-automatic with a latched handle or automatic with a ratcheting-cam action device.
Claims5
A barrier lifter apparatus comprising;
- a pair of right-angled jaw elements positioned horizontally to securely abut a concrete barrier with a vertical side thereof;
- a pair of upright L-shaped tong members, wherein each tong member having a long leg, a juncture and a short leg having a distal end, said distal end connected to one of the right-angled jaw elements;
- two pairs of straight link members, each having a proximate end and a distal end, pivotally connected at its distal end to a proximate end of each L-shaped tong member;
- planar cross braces between each pair of link members;
- each proximate end of a link member joined and connected by a pivot pin to a shackle;
- three rods connecting the proximate and distal ends of each link member;
- two rods connecting the juncture of each tong member;
- and
- a pair of crossbars attached pivotally between each juncture of each tong member, wherein one of each crossbar is positioned outside one juncture and the opposite end is positioned inside the other juncture;
- whereby the concrete road barrier can be hoisted by the apparatus.
7 more elements
Dependencies are inferred from the claim text.