Patents Assigned to Self-Level Covers Aktiengesellschaft
  • Support frame
    Patent number: 4174183
    Abstract: A support frame for a man-hole cover or similar article of highway furniture has a vertical wall portion with an outwardly extending flange at one end. Support means for the cover on the inside of the flange is so arranged that the frame can be mounted either with the flange at the upper end of the wall or with the flange at the lower end of the wall, the top of the cover being level with the top of the frame in both cases. When the frame is mounted with the flange at the upper end, the frame is "self-levelling".
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: November 13, 1979
    Assignee: Self-Level Covers Aktiengesellschaft
    Inventor: Derek Ferns
  • Grating
    Patent number: 4126404
    Abstract: A grating to cover a drain for a paved surface such as a road comprises a set of parallel bars interconnected by spacers. In the central part of the grating, adjacent pairs of bars each have only one spacer therebetween, the spacers being positioned alternately at opposite ends of the bars. This allows the grating to be compressed during insertion into a support frame so that, when the force causing such a compression is removed after insertion, lugs on the grating move into locking engagement with the frame.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: November 21, 1978
    Assignee: Self-Level Covers Aktiengesellschaft
    Inventor: Derek Ferns