Abstract: A semi-trailer landing gear apparatus employing a handheld power tool is disclosed. The landing gear apparatus is attached to a standard landing gear drive shaft. The landing gear apparatus includes a slip collar drive that allows an operator to use the power tool without removing the hand crank. The power tool has a locking blade which slides into or otherwise engages with a trailer-mounted bracket or bracket mounted on a telescoping arm when the coupler is engaged, preventing rotational movement against the operator as the motor is activated. The power tool also has a quick-release socket assembly which readily connects and disconnects the power tool from the apparatus. A planetary gear system is employed for gear reduction within the power tool. The apparatus may employ a trailer-mounted motor to raise and lower the trailer landing gear.

Abstract: A semi-trailer landing gear apparatus employing a handheld power tool is disclosed. The landing gear apparatus is attached to a standard landing gear drive shaft. The landing gear apparatus includes a slip collar drive that allows an operator to use the power tool without removing the hand crank. The power tool has a locking blade which slides into or otherwise engages with a trailer-mounted bracket or bracket mounted on a telescoping arm when the coupler is engaged, preventing rotational movement against the operator as the motor is activated. The power tool also has a quick-release socket assembly which readily connects and disconnects the power tool from the apparatus. A planetary gear system is employed for gear reduction within the power tool. The apparatus may employ a trailer-mounted motor to raise and lower the trailer landing gear.

Abstract: The trailer landing gear apparatus may be used for rotating a drive shaft of a landing gear or lifting gear of a land vehicle. There may be a drive shaft connector that may be attachable to a trailer drive shaft, A drive gear apparatus may be mounted on a rotary drive apparatus and a drive apparatus connector may be attached to a drive socket of the drive gear apparatus. The drive shaft may be rotated by positioning the drive apparatus connector on a connector shaft of the drive shaft connector. The rotary drive apparatus may then be operated to rotate the gear elements of the drive gear apparatus to rotate the drive shaft connector. The drive shaft connector may also have a hand crank handle attached to a sleeve for alternate use in drive shaft rotation.