Vibration isolating hand grip for shank of a percussive chisel

Claim 1

A sleeve unit adapted to be applied to the shank of a work element of a perspective tool and adapted to be grasped in the palm of a worker's hand during operation of the tool, the sleeve unit comprising an enlongated cylindrical body formed of manually squeezable resilient material, the body having an axially extending through hole adapted to receive slidably the shank of a percussive work element, the body having an elongated annular or closed cavity therein, and fluent material filling the cavity, said body comprising a cylindrical outer sleeve of elastomeric material, a cylindrical inner sleeve of elastomeric material disposed in coaxial relation to the outer sleeve, an annular elastomeric spaced disposed between the sleeves at one end of the unit, a second annular spacer disposed between the sleeves at the opposite end of the unit, the spacers serving the space the outer sleeve radially from the inner sleeve, the spacers defining a closed annular cavity between the sleeves containing the fluent material, the spacers being bonded to the inner and outer sleeves, and the inner sleeves defining the axial through hole.