Patents Assigned to Deep Rock Manufacturing Company, Inc.
  • Ratchet and hydraulic seal assembly for rotating hollow shafts
    Patent number: 4520879
    Abstract: A power transfer pipe, surrounded by an elastomeric, self lubricating seal assembly, transfers rotational power in one direction from a prime mover, at the upper end of the power transfer pipe, to a threadedly secured, hollow, drill pipe at the lower end, the seal assembly directs fluid from the sleeve into the drill pipe. A ratchet assembly at the upper end of the power transfer pipe, facilitates the disengagement of the power transfer pipe from the drill pipe.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: June 4, 1985
    Assignee: Deep Rock Manufacturing Company, Inc.
    Inventor: Robert C. MacElvain