Abstract: A fuel filling device includes a fuel pipe seat having a filling port and a fuel pipe in communication with the filling port. Three engagement portions are formed on an inner peripheral face of the fuel pipe. A fuel cap includes a body and an operative portion mounted to the body. Three tracks are formed on an outer periphery of the body. Each track includes a front, lower end and a rear, higher end having a stop. An entrance is defined in front of the front, lower end of each track. The fuel cap is inserted into the fuel pipe with the engagement portions respectively received in the entrances of the tracks. The fuel cap is rotated in a locking direction. The tracks move relative to the engagement portions until the engagement portions are stopped by the stops of the tracks, and the fuel cap is in a locking position.

Abstract: A fuel filling device includes a fuel pipe seat having a filling port and a fuel pipe in communication with the filling port. Three engagement portions are formed on an inner peripheral face of the fuel pipe. A fuel cap includes a body and an operative portion mounted to the body. Three tracks are formed on an outer periphery of the body. Each track includes a front, lower end and a rear, higher end having a stop. An entrance is defined in front of the front, lower end of each track. The fuel cap is inserted into the fuel pipe with the engagement portions respectively received in the entrances of the tracks. The fuel cap is rotated in a locking direction. The tracks move relative to the engagement portions until the engagement portions are stopped by the stops of the tracks, and the fuel cap is in a locking position.

Abstract: A jack for a vehicle includes a main frame fixed to an underside of a vehicle. A screw rod extends through two end plates that are respectively formed on two ends of the main frame. A movable member and a fixed member are respectively mounted on the screw rod. A lower supporting member includes a lower end in contact with the ground and an upper end pivotally connected to the movable member. The connecting member includes a first end pivotally connected to the fixed member and a second end pivotally connected to an intermediate portion of the lower supporting member. The lower supporting member and the connecting member are moved to a position for supporting the vehicle when the screw rod is turned in a direction. The lower supporting member and the connecting member are folded when the screw rod is turned in a reverse direction.

Abstract: A jack for a vehicle includes a main frame fixed to an underside of a vehicle. A screw rod extends through two end plates that are respectively formed on two ends of the main frame. A movable member and a fixed member are respectively mounted on the screw rod. A lower supporting member includes a lower end in contact with the ground and an upper end pivotally connected to the movable member. The connecting member includes a first end pivotally connected to the fixed member and a second end pivotally connected to an intermediate portion of the lower supporting member. The lower supporting member and the connecting member are moved to a position for supporting the vehicle when the screw rod is turned in a direction. The lower supporting member and the connecting member are folded when the screw rod is turned in a reverse direction.