Patents by Inventor Martin E. Freudenberg

Martin E. Freudenberg 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).

  • Integrated boot, seal and impeller system
    Patent number: 6685428
    Abstract: An integrated boot, seal and impeller system is adapted for being driven by a pump shaft. The system includes an impeller unit having a plurality of radially extending blades, a hub portion, a recess in the hub portion and a tubular portion extending from the hub portion. The tubular portion is engaged to the shaft and has an outer diameter with at least one flat in the outer diameter. A seal head is slidingly engaged to the tubular portion. The seal head also has an inner diameter with at least one flat on the inner diameter to engage the outer diameter of the tubular portion. A flexible boot extends from the elastomeric blades. The boot has a distal portion adjacent to the seal head. Additionally, a biasing member is disposed in the recess and urges the seal head into engagement with the seal washer.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: February 3, 2004
    Assignee: Freudenberg-NOK General Partnership
    Inventor: Martin E. Freudenberg