Patent ID: 8573450
Filing Date: 2013-11-05
Classification: B05C

Abstract:
1. An electrical caulking gun comprising: a gun body; a pushing rod movably mounted on the gun body; a motor connected to and driving the pushing rod to move relative to the gun body with a transmission device; a circuit board mounted in the gun body and electrically connected to the motor; a speed changing device electrically connected to the circuit board to control rotating speed of the motor via the circuit board; a trigger pivotally mounted on the gun body; a trigger switch mounted in the gun body and pressed by the trigger; and a clutching device mounted on the gun body at a position near the trigger and comprising the linking lever further has a pushing pin mounted on the pushing end of the linking lever and abutting with the pushed surface of the clutching block; and the caulking gun assembly further comprising a speed-changing switch mounted on the gun body and comprising