Patent ID: 7004682

Claim:
An articulated pipe jack clamp for securing a work piece in a V-shaped cradle of a pipe jack, comprising: a central internally threaded collar member; an externally threaded stem threadedly engaged in said collar and having a handle at a top end and an inverted V-shaped head connected at its bottom end by a swivel connection; a pair of generally L-shaped leg members, each having an elongate upper portion hingedly connected at an upper end to said threaded collar in laterally opposed relation and extending downwardly therefrom and terminating in a shorter inwardly turned bottom portion disposed at an angle relative said elongate upper portion, said leg members being pivotal toward and away from one another in laterally opposed relation; wherein said clamp is placed vertically downward onto a work piece supported in the cradle such that said head is engaged on the top of the work piece, and said inwardly turned bottom portion of each leg is disposed beneath the outwardly diverging sides of the V-shaped cradle, then the stem is rotated to screw the head down to raise and engage said leg bottom portions on the underside of the V-shaped cradle, thereby securely clamping the work piece to the pipe jack.