| 摘要 |
<p>A power tool for applying a rotational force to a spring of a door counterbalancing mechanism. The power tool has a rotatable drive member mounted on a casing carrying a power transmitting structure. The drive member has a slot with an open end for accommodating the shaft of the counterbalancing mechanism. A releasable coupling structure drivably connects the drive member with the collar attached to the spring so that rotation of the drive member will apply rotational force to the spring. A motor connected to the power transmitting structure is operable to rotate the drive member. A socket adapter or pipe adapter can be connected to the drive member so that the power tool is usable to rotate nuts, bolts and pipes.</p> |
