Patents by Inventor Trevor Hirst

Trevor Hirst 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: 9479034
    Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: October 25, 2016
    Assignee: L.H. Carbide Corporation
    Inventors: Thomas Neuenschwander, Barry A. Lee, Trevor Hirst
  • Publication number: 20140290043
    Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.
    Type: Application
    Filed: June 13, 2014
    Publication date: October 2, 2014
    Inventors: Thomas Neuenschwander, Barry A. Lee, Trevor Hirst
  • Patent number: 8786158
    Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: July 22, 2014
    Assignee: L. H. Carbide Corporation
    Inventors: Thomas R. Neuenschwander, Barry A. Lee, Trevor Hirst
  • Publication number: 20120043848
    Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.
    Type: Application
    Filed: August 18, 2011
    Publication date: February 23, 2012
    Applicant: L.H. CARBIDE CORPORATION
    Inventors: Thomas R. Neuenschwander, Barry A. Lee, Trevor Hirst
  • Patent number: 5406243
    Abstract: Complementary packs of laminations (41, 43) are provided for use in an electromagnetic device, the laminations in different layers having legs of length that alternates according to a predetermined pattern. The lamination of one pack (41) can fit into the laminations of another pack (43) which has legs alternating according to a complementary pattern. The packs (41, 43) can be push-fitted together about a bobbin (45) to form an interleaved stack of laminations for a transformer or other electromagnetic device. A method and apparatus for forming the stacks are also described.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: April 11, 1995
    Assignee: Linton & Hirst Limited
    Inventors: Peter R. Jenkins, Trevor Hirst
  • Patent number: 5047745
    Abstract: Packs of laminations and a method of assembling the packs of laminations to make a core of an electromagnetic device such as a transformer or motor are described. First and second packs of complementary laminations (12, 14) are provided that fit relatively freely together and have interfitting formations e.g. dovetail formations (16) and projections (18). Preferably adjacent laminations of each pack are attached. The first and second packs of laminations (12, 14) are held positively together in mechanical contact e.g. in a jig. The formations (18) on one or both of the laminations are then deformed to engage the formations (16) of the other lamination to clamp the first and second packs of laminations (12, 14) together. In an alternative form the first and second packs of laminations clip together.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: September 10, 1991
    Assignee: Linton and Hirst Limited
    Inventors: George W. Marriott, Trevor Hirst