Patent attributes
A battery-powered grease gun is provided for enhancing the pressure applied to a blocked grease fitting. The grease comprises a circuit interconnecting the battery and an electric motor. The circuit includes a switch operable by a user and a thermal protector for breaking the circuit at a predetermined temperature. When applying grease to a blocked grease fitting, actuating the switch until the thermal protector reaches the predetermined temperature breaks the circuit until the motor cools and the thermal protector resets for completing the circuit and again energizing the motor. Continuing to maintain the switch in the actuated position until the thermal protector resets causes the pressure in the grease gun to increase with each cycle of the thermal protector.
