Patents Assigned to Establissements Montabert
  • Hydraulic distributor for percussion apparatus driven by an incompressible fluid under pressure
    Patent number: 4858702
    Abstract: In the body of the distributor (6) is mounted for sliding a valve (21) delimiting with the bore of the distributor in which it is mounted at least one control chamber (22) in permanent communication by means of at least one channel (31) with the control chamber of the distributor. When a hydraulic signal is received in the control chambers, the valve (21) moves, controlling the subsequent movement of the distributor (6) independently of any hydraulic connection made by the percussion piston.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: August 22, 1989
    Assignee: Establissements Montabert
    Inventor: Bernard Piras