Patents by Inventor Glen S. Grissinger

Glen S. Grissinger 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).

  • Mine roof anchor having adjustable resin retaining washer
    Patent number: 5181800
    Abstract: A roof anchor for supporting an underground mine roof or the like is provided. The roof anchor has an elongated shaft with a head formed at one end. The head supports a washer and a roof supporting plate that surrounds the mouth of a blind bore formed upwardly into the roof. A resin capsule is positioned within the blind bore above the roof anchor. The shaft of the roof anchor has an adjustably securable annular washer surrounding the shaft. The annular washer is fixed in a position so that when the resin capsule is ruptured to release the resin to bind the roof anchor within the bore hole, the resin completely fills the bore hole from the blind end of the bore to the rigid annular washer fixed to the shaft of the roof anchor.
    Type: Grant
    Filed: December 24, 1991
    Date of Patent: January 26, 1993
    Assignee: Jennmar Corporation
    Inventors: John C. Stankus, Eugene H. Stewart, Glen S. Grissinger
  • Mine roof anchor having adjustable resin retaining washer and expansion shell assembly with friction reducing means
    Patent number: 5082399
    Abstract: The mine roof anchor includes a roof bolt assembly with an expansion shell assembly secured at the end of the bolt inserted into the bore hole. The expansion shell assembly includes a friction reducing means to increase the horizontal force on the leaves and the bolt assembly includes an adjustable resin retaining washer to compress the resin in the bore hole.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: January 21, 1992
    Assignee: Jennmar Corporation
    Inventors: Jerry E. Frease, John C. Stankus, Eugene H. Stewart, Glen S. Grissinger
  • Mine roof anchor having adjustable resin retaining washer
    Patent number: 4865489
    Abstract: A roof anchor for supporting an underground mine roof or the like is provided. The roof anchor has an elongated shaft with a head formed at one end. The head supports a washer and a roof supporting plate that surrounds the mouth of a blind bore formed upwardly into the roof. A resin capsule is positioned within the blind bore above the roof anchor. The shaft of the roof anchor has an adjustably securable annular washer surrounding the shaft. The annular washer is fixed in a position so that when the resin capsule is ruptured to release the resin to blind the roof anchor within the bore hole, the resin completely fills the bore hole from the blind end of the bore to the rigid annular washer fixed to the shaft of the roof anchor.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: September 12, 1989
    Assignee: Jennmar Corporation
    Inventors: John C. Stankus, Eugene H. Stewart, Glen S. Grissinger