Patents by Inventor Jack T. Droullard

Jack T. Droullard 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: 8943630
    Abstract: A dock leveler comprising a vehicle-engaging lip pivotally coupled to the vertically adjustable front edge of a deck includes a seal or series of seal segments that close one or more air gaps that exist in the area where the lip is hinged to the deck. Such gaps are particularly large when the lip hinge comprises a hinge pin that couples a series of lugs extending from underneath the deck to a series of lugs extending from the lip, wherein the lugs are spaced apart along the length of the hinge pin. The seal or seal segments could be above the deck, below the deck, or interposed between the adjoining edges of the deck and the lip. In some cases, the seal is provided by an air curtain or by a tube that is inflatable or hermetically sealed.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: February 3, 2015
    Assignee: Rite-Hite Holding Corporation
    Inventors: Charles J. Digmann, Jack T. Droullard, Timothy J. Schmidt
  • Publication number: 20120227192
    Abstract: A dock leveler comprising a vehicle-engaging lip pivotally coupled to the vertically adjustable front edge of a deck includes a seal or series of seal segments that close one or more air gaps that exist in the area where the lip is hinged to the deck. Such gaps are particularly large when the lip hinge comprises a hinge pin that couples a series of lugs extending from underneath the deck to a series of lugs extending from the lip, wherein the lugs are spaced apart along the length of the hinge pin. The seal or seal segments could be above the deck, below the deck, or interposed between the adjoining edges of the deck and the lip. In some cases, the seal is provided by an air curtain or by a tube that is inflatable or hermetically sealed.
    Type: Application
    Filed: May 24, 2012
    Publication date: September 13, 2012
    Inventors: Charles J. Digmann, Jack T. Droullard, Timothy J. Schmidt
  • Publication number: 20090165224
    Abstract: A dock leveler comprising a vehicle-engaging lip pivotally coupled to the vertically adjustable front edge of a deck includes a seal or series of seal segments that close one or more air gaps that exist in the area where the lip is hinged to the deck. Such gaps are particularly large when the lip hinge comprises a hinge pin that couples a series of lugs extending from underneath the deck to a series of lugs extending from the lip, wherein the lugs are spaced apart along the length of the hinge pin. The seal or seal segments could be above the deck, below the deck, or interposed between the adjoining edges of the deck and the lip. In some cases, the seal is provided by an air curtain or by a tube that is inflatable or hermetically sealed.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Inventors: Charles J. Digmann, Jack T. Droullard, Timothy J. Schmidt
  • Patent number: 6044597
    Abstract: A windstrap assembly for a dock seal mounted on a building wall and which includes a fabric encased foam side pad mounted to the wall, and a vertically hanging curtain. The assembly includes a resilient member with two ends--one mountable to the curtain, and the other mountable to the side pad adjacent the wall. A friction reducing member is disposable between the resilient member and the pad fabric such that it frictionally engages and moves with the resilient member related to the side pad.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: April 4, 2000
    Assignee: Rite-Hite Holding Corporation
    Inventors: Jack T. Droullard, Greg J. Thill