Patent ID: 6978986

Claim:
A clamping device comprising a scaled rod, a movable jaw connected to a distal end of said scaled rod, an operating handle pivotally connected at an upper end to said clamping device via a supporting point, and a transmission mechanism for moving said scaled rod and said movable jaw at the same time; said transmission mechanism including a housing that is pivotally fixed to said operating handle below said supporting point, and provided with an internal passage for said scaled rod to extend therethrough and an upper cavity obliquely extended from said internal passage in a predetermined rearward and upward direction to locate above said scaled rod, so that a lower open end of said upper cavity is communicating with said internal passage; and said transmission mechanism also including a lower cavity located in said clamping device below said scaled rod and in front of said upper cavity by a predetermined distance, and said lower cavity being obliquely extended rearward and downward at a predetermined angle and having an upper open end.