Patents Assigned to EMG Hydraulics, Inc.
  • Patent number: 4061161
    Abstract: An anti-extrusion grommet assembly is provided for releasably retaining a tubular valve housing in the liquid port of a bladder-type pressure accumulator. The grommet assembly of the invention is constructed to preclude any possibility of the valve housing from being blown out through the port in the presence of normal operating pressures within the accumulator shell. The assembly is particularly intended for use with relatively small sized accumulators of, for example, capacities of the order of one gallon.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: December 6, 1977
    Assignee: EMG Hydraulics, Inc.
    Inventor: Edward M. Greer
  • Patent number: 4056127
    Abstract: An open-ended accumulator is provided which may be constructed to be of a relatively large size, for example, in the 15-25 gallon range, and to be of relatively high pressure of the order, for example, of 5,000 psi. The accumulator is constructed so that its internal bladder can be replaced from one end of the shell without the need to remove the accumulator from the equipment in which it is installed. The accumulator includes a forged cap which is contoured to accept the rim of a thimble-shaped bladder within the shell, the cap being fitted within the open end of the shell. A segmented wedge-shaped tapered ring retains the cap in the shell. As outer plate may also be provided to permit the accumulator to be mounted under water without the water pressure tending to force the cap into the interior of the shell.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: November 1, 1977
    Assignee: EMG Hydraulics, Inc.
    Inventor: Edward M. Greer