Patent ID: 8403369

Claim:
A connector comprising: a body having two ends; a mounting tube formed on one end of the body and adapted to connect to an oil drain valve mounted on an underground oil depot; a connection tube mounted on the other end of the body and adapted to connect to an oil pipe; and a sealing ring mounted in the mounting tube; a handle pivotally mounted on the body; a transmission device pivotally connected to the handle and comprising a linking lever having a first end pivotally connected to the handle and a second end; and two transmitting levers pivotally and slidably connected to the second end of the linking lever; two locking arms pivotally mounted on the mounting tube of the body, selectively extending into the mounting tube and respectively connected securely to the transmitting levers, with each locking arm having a pushing protrusion mounted on the locking arm and adapted to push against a joint on the oil drain valve; and a safety device mounted between the body and the handle and having an engagement block mounted on and protruding from the body and being curved; a locking element mounted pivotally on the handle with a pivoting pin and having a locking tab formed on an end of the locking element and selectively engaging and abutting with the engagement block; and a torsion spring mounted around the pivoting pin and having two ends abutting respectively with the handle and the locking element.