Patents by Inventor Dennis D. McPherson

Dennis D. McPherson 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: 5437316
    Abstract: A method and apparatus for dripless filling of liquid material within containers wherein a filling nozzle is moved downwardly or the container is moved upwardly until its shroud engages the upper end of the container and positions its nozzle into the container. After transferring a measured volume of liquid into the container, the filling head is moved upwardly out of contact with the liquid and vacuum is applied immediately at the lower tapered tip of the dispensing nozzle to recover any drippage descending downwardly to the point of the tip. Simultaneously with its withdrawal from the container, residual liquid is wiped from the external tubular member into the container, leaving only a small quantity of residual liquid on the tapered tip which is easily recovered by the vacuum system. The recovered drippage is transferred by the vacuum system to a vacuum chamber and is then selectively transferred from the vacuum chamber to a supply chamber for subsequent filling operation.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: August 1, 1995
    Assignee: McPherson Dripless Systems Co., Inc.
    Inventor: Dennis D. McPherson
  • Patent number: 5255720
    Abstract: A method and apparatus for dripless filling of liquid material within containers wherein a filling nozzle is moved downwardly or the container is moved upwardly until its shroud engages the upper end of the container and positions its nozzle into the container. After transferring a measured volume of liquid into the container, the filling head is moved upwardly out of contact with the liquid and vacuum is applied immediately at the lower tapered tip of the dispensing nozzle to recover any drippage descending downwardly to the point of the tip. Simultaneously with its withdrawal from the container, residual liquid is wiped from the external tubular member into the container, leaving only a small quantity of residual liquid on the tapered tip which is easily recovered by the vacuum system. The recovered drippage is transferred by the vacuum system to a vacuum chamber and is then selectively transferred from the vacuum chamber to a supply chamber for subsequent filling operation.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: October 26, 1993
    Assignee: McPherson Dripless Systems Co., Inc.
    Inventor: Dennis D. McPherson