Hammer drill or chipping hammer

A hammer drill or chipping hammer comprising a housing having a front end and a rear end and an axis extending in the front end-rear end direction, a handle mounted on the rear end of said housing, wherein the improvement comprises means for supporting said handle on the rear end of said housing so that said handle is movably displaceable relative to said housing in the front end-rear end direction, said handle supporting means including first spring, and means for adding weight to said housing and said means for adding weight being movably displaceable in the front end-rear end direction, the weight of said housing is in the range of eight to twelve times that of the weight of said means for adding weight, said means for adding weight comprises a plurality of weighted members and a second spring individually supporting each of said weighted members, said means for adding weight comprises an absorber housing positioned on the outside of said housing and having a front end and a rear end, said absorber housing includes guide cylinders therein extending parallel to the front end-rear end direction of said housing and spaced outwardly from said housing, one said weighted member reciprocates within each of said guide cylinders, each said weighted member being a piston-like member with at least one axially extending part of said piston-like member disposed in sliding contact with the inside surface of said guide cylinder within which it is located, and said absorber housing having pressure equalization lines interconnecting said guide cylinders to equalize pressure created within said guide cylinders as said weighted members reciprocated.