| CPC B25D 17/02 (2013.01) [E02F 3/966 (2013.01); B25D 2250/111 (2013.01); B25D 2250/125 (2013.01)] | 16 Claims |
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1. A hammer assembly comprising:
a hammer;
a hammer housing; and
a work chamber in the hammer housing having a plurality of splines, a locking ring, a retainer ring, a hammer tool removably insertable in an opening in the hammer housing and into the work chamber,
wherein the hammer tool includes:
a spline section, and
a tool section,
wherein the spline section of the hammer tool includes:
a first spline sector including at least six spline grooves, and
a second spline sector including at least six splines,
wherein the first spline sector and the second spline sector are separated by a spacer,
wherein the tool section has a tool section diameter,
wherein the first spline sector and the second spline sector are larger in diameter than the tool section diameter,
wherein the tool section diameter is smaller than a spline section diameter,
wherein each of the at least six splines of the second spline sector of the spline section transitions directly into the tool section, sloping from the spline section diameter to the tool section diameter,
wherein the tool section diameter is 3.2-4.8 times larger than a spline groove diameter of each of the spline grooves,
wherein the locking ring separates a first set of splines of the hammer housing from a second set of splines of the hammer housing,
wherein the locking ring is a ring having locking indents disposed across an interior of the locking ring and is configured to rotate around the spacer between a locked state and an unlocked state, whereby the locked state couples the hammer tool to the hammer housing,
wherein the locking indents are one chosen from the group consisting of pyramidal, squared, and trapezoidal, and
wherein the plurality of splines are cylindrical wear rods each having a circular cross-section at least at ends thereof facing toward the locking ring.
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