Patents by Inventor Henry H. Roos

Henry H. Roos 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).

  • Rock drill feed mechanism
    Patent number: 3980144
    Abstract: A rock drill feed shell is slidably mounted on a support bracket and is connected to a feed screw which is threaded through a feed nut mounted on an elongated supporting tube disposed telescopically within the feed shell. The supporting tube is displaceable with respect to the support bracket by a feed extension cylinder mounted on the support bracket. A rock drill is slidably mounted on the feed shell and engages a second feed screw supported by the feed shell. A feed motor is drivably connected to both screws.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: September 14, 1976
    Assignee: Gardner-Denver Company
    Inventors: Henry H. Roos, Clarence O. Boom