Hammer drill with a mode changeover mechanism

A drill/driver comprising:

• a motor having an output member;
• a planetary transmission receiving rotary power from the output member and producing a rotary output, the planetary transmission including a ring gear;
• a clutch assembly having a clutch profile, which is coupled to the ring gear, and a first pin assembly having a first follower, a first pin member and a first spring that biases the first follower into contact with the clutch profile;
• and
• a clutch bypass having a bypass profile, which is coupled to the ring gear, and second pin assembly having a second follower, a second pin member, a second spring, which biases the second follower away from the bypass profile, and a third spring, which biases the second follower away from the second pin member;
• wherein the planetary transmission includes a transmission sleeve into which the ring gear is disposed, wherein the transmission sleeve includes a first longitudinally extending bore into which at least one of the first pin assembly and the second pin assembly is disposed, and wherein the drill/driver is operable in a screwdriver mode, wherein a rotary output is provided to an output spindle and the second follower is spaced apart from the bypass profile, and a drill mode, wherein a rotary output is provided to the output spindle and the second follower is engaged to the bypass profile to inhibit rotation of the ring gear.