Patents by Inventor Ewald R. Ulmer

Ewald R. Ulmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5558882
    Abstract: A pipe paver finishing machine is disclosed for applying and finishing concrete lining onto the interior surface of a lower segment portion of a drainage pipe. The machine includes a chassis member adapted for movement longitudinally along the interior of the drainage pipe and a surfacing unit suspended from the chassis member and adapted for a pendulum-type pivotal movement substantially about the center point of drainage pipe to apply and to finish a concrete liner onto the bottom interior surface of the drainage pipe.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: September 24, 1996
    Assignee: CMI Corproration
    Inventor: Ewald R. Ulmer
  • Patent number: 5492432
    Abstract: A concrete vibrator apparatus is described for use in conjunction with a concrete finishing machine that is movable longitudinally along a roadway. The finishing machine includes a finishing unit engageable with the surface of the concrete and movable transversely across the roadway, a supporting frame mounted to and extending forwardly and outwardly from the movable finishing unit, and a vibrator assembly mounted to the supporting frame. The vibrator assembly includes first and second vibrator units, with each of the vibrator units being independently movable between a downwardly position wherein the vibrator unit extends into and below the surface of the concrete and an upwardly position wherein the vibrator unit is out of contact with the surface of the roadway. A control mechanism is described for controlling the selective movement of the vibrator units and the rate of vibration of the vibrator units.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: February 20, 1996
    Assignee: CMI Corporation
    Inventors: Larry G. Eben, Jerry Chaon, Ewald R. Ulmer
  • Patent number: 5388927
    Abstract: A pan drag device is disclosed for attachment to a concrete finishing machine movable longitudinally along an elongated body of poured concrete, with the finishing machine having a finishing unit engageable with the surface of the poured concrete and movable transversely across the body of concrete to grade the concrete. The pan drag device includes support members mounted to and extending rearwardly from the finishing unit and movable with the finishing unit and pan drag apparatus mounted to the support members for engaging the graded concrete surface to finish and seal the concrete surface.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: February 14, 1995
    Assignee: CMI Corporation
    Inventors: Ewald R. Ulmer, Larry G. Eben
  • Patent number: 4993869
    Abstract: A concrete finishing machine includes a surfacing unit having one or more finishing rollers supported on the surfacing unit carriage by a finishing roller vibrating assembly which includes a frame supporting the finishing rollers at one end and on which is mounted a pair of vibrator units producing vibrational forces which are applied to the finishing rollers through the frame, the vibrator units being mounted on a common beam and spaced apart laterally of one another whereby horizontal forces are cancelled and only vertical amplitude vibrational forces are applied to the finishing rollers.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: February 19, 1991
    Assignee: CMI Corporation
    Inventors: Ewald R. Ulmer, Murray A. Rowe
  • Patent number: 4484834
    Abstract: A paver embodying a vibrating pan for spreading concrete and smoothing and compacting the same on a sloping surface is described.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: November 27, 1984
    Assignee: Bid-Well Corporation
    Inventors: Murray A. Rowe, Ewald R. Ulmer