Patents by Inventor John A. Pedersen

John A. Pedersen 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: 5863240
    Abstract: The present invention relates to an improved blast cleaning apparatus for cleaning coiled wire with abrasive cleaning material. A prior art apparatus for blast cleaning wires comprises an elongated boom provided with annular splitters for longitudinal separation of wire coils and metal lifters for radial separation of wire coils to expose substantially all of the surface of the wires to the abrasive cleaning material. Due to the hardness of the lifters, some abrasive cleaning material becomes embedded in the wire and causes problems with subsequent processing steps. The present invention provides a blast cleaning apparatus having resilient lifters which overcome this and other difficulties. Preferably, the lifters according to the present invention are made of polyurethane and are used in combination with a conventional boom with or without splitters.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: January 26, 1999
    Inventor: John A. Pedersen
  • Patent number: 5782676
    Abstract: The present invention relates to an improved lifter for a blast cleaning apparatus for cleaning coiled wire with abrasive cleaning material. A prior art apparatus for blast cleaning wires comprises an elongated boom provided with annular splitters for longitudinal separation of wire coils and metal lifters for radial separation of wire coils to expose substantially all of the surface of the wires to the abrasive cleaning material. Due to the hardness of the lifters, some abrasive cleaning material becomes embedded in the wire and causes problems with subsequent processing steps. The present invention provides a resilient lifter for a blast cleaning apparatus which overcome this and other difficulties. Preferably, the lifters according to the present invention are made of polyurethane and are used in combination with a conventional boom with or without splitters.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: July 21, 1998
    Assignee: Blast Cleaning Products Ltd.
    Inventor: John A. Pedersen
  • Patent number: 4077508
    Abstract: An enclosed hanger bearing suitable for use under severe operating conditions is disclosed. The bearing is completely sealed to prevent the entry of abrasive materials. The bearing has an adaptor plate for engaging augers which are supported by the bearing from an overhead support. A combination of felt and magnetic strip seals are employed to prevent entry of abrasive into the bearing which is permanently lubricated.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: March 7, 1978
    Assignee: Wheelabrator-Frye Inc.
    Inventor: John A. Pedersen
  • Patent number: 4070799
    Abstract: A finger seal is disclosed for use in conjunction with shot blasting operations. The seal is formed of polyurethane or similar materials which are resistant to wear from shot blasting. The seals are provided with a plurality of longitudinal reinforcing ribs to increase their strength and effectiveness in preventing the escape of shot from an enclosure.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: January 31, 1978
    Assignee: Wheelabrator-Frye Inc.
    Inventor: John A. Pedersen