(57) A multi-purpose tool with a two-directional electric, hydraulic or pneumatic motor
comprises a spindle (7) rotatably mounted in bearings (8,9) within a cylindrical housing
(10), said spindle (7) being provided at its free end with means to receive a suitable
operating tool, a clutch (14, 15) adapted to be controlled by a spring (16) which
surrounds the spindle 7 and an adjustment ring (17) constituting a bearing surface
for said spring (7). The ring (17) is loosely mounted on said spindle (7) and held
thereon by a clamp-nut (21), threaded to engage with the outside of said housing (10).
The adjustment ring (17) is provided with diametrically opposed set screws (19), pins,
lugs or similar which extend through elongated slots (20) in said housing (10) and
is fixed in position by the clamp-nut (21). Thus by rotating the clamp-nut (21) the
force of spring (16) can be adjusted without dismantling the tool (Fig. 1).
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