Patent ID: 7021399

Claim:
A power tool comprising: a body having a motor, and a first output shaft that is operatively coupled to the motor; an attachment for engagement with the body, wherein the attachment includes an input shaft for operative engagement with the first output shaft of the body when the attachment is engaged with the body, and wherein the attachment includes a further output shaft for transmitting rotational motion derived from rotational motion of the attachment input shaft; and a lock having a first portion that is associated with the body and a second portion that is associated with the attachment, the lock being operable in a locked condition, wherein the first and second portions are engaged to one another to thereby secure the body and the attachment together, the lock being further operable in an unlocked condition, wherein the first and second portions are disengaged from one another to permit the attachment to be removed from the body; wherein both the body and the attachment have a respective gear mechanism for causing a change in rotational speed as between the input and the output of the respective gear mechanism, the combination of the body and the attachment thereby providing a power tool with a plurality of serially-coupled gear mechanisms, and wherein the lock provides an operator of the power tool with a tool-less means by which the operator may couple the attachment to the body.