Patents by Inventor Frederick C. Hahn

Frederick C. Hahn 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: 5188680
    Abstract: A method of making a tooth point and product wherein a tubular blank of alloy steel is heated, shaped at one end to provide a box section and shaped at the other end to provide a blade made up of two layers of steel forged together.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: February 23, 1993
    Assignee: ESCO Corporation
    Inventors: Frederick C. Hahn, Andrew H. Ulven, James W. Huiras
  • Patent number: 5152088
    Abstract: A novel tooth point, locking pin and method of replacing a worn point wherein the point is held in place by a pin having a resilient laterally outwardly extending projection received in a recess provided in the inner surface of an L-shaped rearwardly extending tongue on the point, the pin having an elastomeric core within a steel jacket.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: October 6, 1992
    Assignee: ESCO Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 5074062
    Abstract: A method of replacing a worn point of an excavating tooth wherein the point is held in place by a pin lock including a shearable top flange and torque-resisting, forwardly extending rib, the method including exerting a downward force on the pin lock to shear the top flange while the forwardly extending rib guides the pin lock downwardly and out of locking engagement with aligned slots in the tooth adapter nose and point rearwardly extending ear, removing the worn point and installing a new point along with a new pin lock including a top flange and forwardly extending rib.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: December 24, 1991
    Assignee: Esco Corporation
    Inventors: Frederick C. Hahn, Kirk E. Yoresen, William A. Fewless, Robert K. Emrich, Michael J. Secrist
  • Patent number: 4727663
    Abstract: A locking device for an excavating tooth, where the tooth has vertically aligned openings for the receipt of the locking device, which includes a relatively elongated pin having a reduced diameter central cylindrical portion and a basket spring mounted and substantially surrounding the cylindrical portion to provide a ball and socket-like connection between the lock and the tooth.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: March 1, 1988
    Assignee: Esco Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 4716668
    Abstract: An excavating tooth point having a socket adapted to receive the nose of an adapter, the point being equipped with vertically alinged pin openings and with each pin opening having a recess extending around the pin opening in the socket interior, the recess being defined by a horizontal wall extending from the rear of the point forwardly and merging with a vertical wall so as to provide clearance for a basket spring flange and further including a sloping surface to accommodate the tang of a wear cap.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: January 5, 1988
    Assignee: ESCO Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 4663867
    Abstract: A locking device for a Whisler style adapter, which has upper and lower legs flanking an excavator lip having aligned openings and which are adapted to receive a wedge and C-clamp lock, the lock including a C-clamp and cooperating wedge which are spaced apart, and interposed therebetween is a spring loaded keeper member so as to permit movement of the adapter relative to the lip under an applied load.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: May 12, 1987
    Assignee: ESCO Corporation
    Inventors: Frederick C. Hahn, Larren F. Jones
  • Patent number: 4585117
    Abstract: A mechanically attached conveyor flight including a generally rectangular elongated metal body having a notch in the top, front and rear walls for the receipt of a chain link, cavity and recess means flanking the link receiving notch for the mounting of a locking plate, threaded lock and keeper for two stage disassembly and flight removal without the need of welding while providing a rugged, reliable installation.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: April 29, 1986
    Assignee: ESCO Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 4577423
    Abstract: An excavating tooth especially suited for trenching and the like wherein relatively smaller teeth are employed, the tooth incorporating a dual lock utilizing helical thread means and snap-in, detent-like means operative upon the conclusion of rotatable engagement of the tooth parts.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: March 25, 1986
    Assignee: ESCO Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 4501079
    Abstract: A two-piece cutting edge construction wherein a plurality of adapters are mounted on the mold board each having releasably locked thereto a cutting edge; the sidewalls of the adapters and cutting edges being recessed for the receipt of longitudinally (forwardly/rearwardly) stabilizing pins; the lock for releasably coupling the cutting edge to the adapter including two legs resiliently inner connected by a compression spring with the lock being insertable and removable by forces extending transversely of the forward/rearward mounting and unmounting direction of the cutting edge.
    Type: Grant
    Filed: August 24, 1983
    Date of Patent: February 26, 1985
    Assignee: ESCO Corporation
    Inventors: Frederick C. Hahn, Larren F. Jones
  • Patent number: 4470210
    Abstract: A mounting and method for an excavating implement embodying a shank positioned within a recess, the shank and recess being equipped with confronting spherical zonal walls and the shank and recess at the apices thereof being equipped with spherical segmental walls, the shank and recess between the two sets of spherical walls providing a gap into which thermosplastic material is introducible to provide a superior and stress transmitting fit.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: September 11, 1984
    Assignee: ESCO Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 4428131
    Abstract: An excavating tooth including an adapter, a wear cap for the adapter and a point in which the point and adapter have primary cooperating stabilizing surfaces and in which the point and wear cap are equipped with inter-engaging flanges to provide secondary stabilizing surfaces.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: January 31, 1984
    Assignee: Esco Corporation
    Inventor: Frederick C. Hahn
  • Patent number: 4335532
    Abstract: An excavating tooth wherein the coupling between the point and the adapter is achieved through generally helical thread means with an external lock to prevent removal by reverse rotation relative to the direction of the helical thread means.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: June 22, 1982
    Assignee: ESCO Corporation
    Inventors: Frederick C. Hahn, William R. Barber, Jr., David A. Hampel
  • Patent number: 4267653
    Abstract: A C-clamp and wedge for releasably locking a slip-over adapter to the lip of a shovel dipper or like piece of excavating equipment wherein the serratons on the wedge are interlocked with serrations on a resilient lock member received within the clamp and uniquely stabilized by confining sidewalls on the clamp.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: May 19, 1981
    Assignee: ESCO Corporation
    Inventors: Frederick C. Hahn, Larren F. Jones
  • Patent number: 4061432
    Abstract: A releasable lock for an excavating tooth employing a pin and plug wherein each of these elements is equipped with a plurality of angularly related planar surfaces arranged to provide alternating crests and valleys.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: December 6, 1977
    Assignee: Esco Corporation
    Inventors: Frederick C. Hahn, Larren F. Jones
  • Patent number: D352044
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: November 1, 1994
    Assignee: Bucyrus Blades, Inc.
    Inventor: Frederick C. Hahn