×

Tooth assembly and lock system

  • US 5,956,874 A
  • Filed: 05/07/1998
  • Issued: 09/28/1999
  • Est. Priority Date: 05/07/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A lock system for locking a tooth point to an adaptor adapted to be mounted on earth moving equipment, comprisingan adaptor having opposite top and bottom surfaces and opposite side surfaces, and a circular adaptor hole of predetermined diameter extending through the adaptor between a pair of said opposite surfaces;

  • a tooth point having a socket cooperatively receiving said adaptor defined by top, bottom and opposite side walls each having an inner face and an outer face, said adaptor hole being overlapped by a pair of opposite walls of said tooth point, said pair of opposite walls having a first and a second aperture, respectively, therein axially aligned with said hole, said first aperture being of circular cross section and comprising a portion opening to the inner face of the wall containing said first aperture and being substantially the same diameter as said adaptor hole diameter, said first aperture comprising a counterbored portion of a predetermined diameter greater than said adaptor hole diameter, said counterbored portion being adjacent the said outer face of the wall containing said first aperture and having an annular groove therein, said second aperture comprising an internal bore having a first section opening to the inner face of the wall containing said second aperture and a second section of a diameter less than that of said adaptor hole adjacent its said outer face;

    a locking pin of circular cross-section situated in said adaptor hole and first and second apertures and fixing the tooth point to the adaptor, said locking pin having a diameter larger than the reduced diameter section of said second aperture; and

    a ring-shaped keeper, having a rigid inner core and a resilient outer rim portion, said inner core defining a circular hole substantially coaxial with said locking pin and sized to prevent the locking pin from passing therethrough, said outer rim portion having a chord across the axis of said inner core hole greater than the diameter of said counterbored portion of said first aperture, said keeper being situated within said annular groove when assembled so as to retain said locking pin in said adaptor hole and said apertures.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×