Patents by Inventor Charles E. Yocum

Charles E. Yocum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hammer drill with a mode changeover mechanism
    Patent number: 7314097
    Abstract: A hammer drill/driver with a motor having an output member, a planetary transmission, a clutch assembly and a clutch bypass. The planetary transmission, which includes a ring gear, receives rotary power from the output member and produces a rotary output. The clutch assembly has 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. The clutch bypass has 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. A method for operation of a hammer drill/driver is also provided.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: January 1, 2008
    Assignee: Black & Decker Inc.
    Inventors: Cheryl Jenner, Stephen A. Debelius, Craig A. Schell, Daniel Puzio, Warren A. Ceroll, Robert S. Gehret, James B. Watson, Charles E. Yocum, Christopher M. Brock, Michael D. Zalobsky