Patents Assigned to Hydraforms Developments (Pty) Ltd.
  • Simplified apparatus for forming building blocks
    Patent number: 6387308
    Abstract: Apparatus for forming building blocks includes an upright compression chamber with an upper end which serves both as an inlet and an outlet. A sliding gate closes the inlet/output. A soil/cement mixture is loaded into the upper end of the compressing chamber, the gate is slide shut, and a ram then compresses the mixture against the gate. The gate is opened while the ram is still under pressure, smoothing the upper end of the block, and allowing it to be ejected through the common inlet/outlet.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: May 14, 2002
    Assignee: Hydraforms Developments (Pty) Ltd.
    Inventor: Joachim Kofahl
  • Simplified apparatus for forming building blocks
    Patent number: 5919497
    Abstract: Apparatus for forming building blocks comprises an upright compression chamber with an upper end which serves both as an inlet and an outlet. A sliding gate closes the inlet/outlet. A soil/cement mixture is loaded into the upper end of the compression chamber, the gate is slid shut, and a ram then compresses the mixture against the gate. The gate is opened while the ram is still under pressure, smoothing the upper end of the block, and allowing it to be ejected through the common inlet/outlet.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: July 6, 1999
    Assignee: Hydraform Developments (PTY) Ltd.
    Inventor: Joachim Kofahl