Patents Assigned to Steel Parts Corporation
  • Textured separator plate and method of making
    Patent number: 6311815
    Abstract: The present invention comprises a textured separator plate having specific desirable surface characteristics and method of manufacture of said plate. The separator plate in one embodiment is fashioned from steel which is textured by cold working, for example, by a laser-matte rolling process. Preferably, the surface texture is a repeatable bi-dimensional pattern exhibiting a surface profile which is plateau-like in appearance, the texture comprising a regular pattern of curvilinear recesses defining island-like features.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: November 6, 2001
    Assignee: Steel Parts Corporation
    Inventors: John F. Riggle, Richard L. Case
  • Method for forming a bushing
    Patent number: 5216811
    Abstract: An apparatus for use in a vibration damping assembly includes a bushing that is die formed from a steel blank. The bushing is formed to have a substantially tubular shape with an interior surface defining an inner cavity into which moving rods can be inserted, an exterior surface, and a joint having a first edge in overlapping contact with a second edge to form a contact surface. The joint formed by the contact surface between the first and second edges extends between the exterior surface and the interior surface of the bushing.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: June 8, 1993
    Assignee: Steel Parts Corporation
    Inventors: Arthur C. Jackson, Raymond P. Chandler
  • Vibration damper
    Patent number: 5145143
    Abstract: An apparatus for use in a vibration damping assembly includes a bushing that is die formed from a steel blank. The bushing is formed to have a substantially tubular shape with an interior surface defining an inner cavity into which moving rods can be inserted, an exterior surface, and a joint having a first edge in overlapping contact with a second edge to form a contact surface. The joint formed by the contact surface between the first and second edges extends between the exterior surface and the interior surface of the bushing.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: September 8, 1992
    Assignee: Steel Parts Corporation
    Inventors: Arthur C. Jackson, Raymond P. Chandler