Patents Assigned to H. Reinholdt A/S
  • Hammer drilling devices
    Patent number: 4047722
    Abstract: In a drilling device, especially a hammer drill, a tool is coupled to a tool receiving means by co-operating male and female coupling elements which ensure uniform rotational motion of the tool in relation to the tool receiving means; additional transition and guiding surfaces being provided for inserting or removing the tool single-handed.
    Type: Grant
    Filed: August 19, 1975
    Date of Patent: September 13, 1977
    Assignee: H. Reinholdt A/S
    Inventors: Mogens B. Nielsen, Niels Halfdan Boa, Jimmy Jensen