Patent ID: 8061700

Claim:
A clamp apparatus to hold an object on a worktable, the clamp apparatus comprising; a guiding pole comprising a pole body movably mounted to the worktable, and a blocking portion fixed to the pole body; a pressing member connected to the pole body of the guiding pole; a supporting pin extending from the pressing member towards the worktable, wherein the supporting pin is passed through the worktable with the pressing member abutting against the worktable in response to the pressing member at a first position, while the supporting pin abuts against the worktable to prop up the pressing member from the worktable in response to the pressing member at a second position; and a resilient member connected between the blocking portion and the worktable; wherein the pressing member is rotatable related to the worktable between the first position where the pressing member forces the object against the worktable and the supporting pin passes through the worktable in response to restoring of the resilient member, and the second position where the supporting pin abuts against the worktable to keep a disengagement of the pressing member from the object overcoming restoring of the resilient member.