Method of making sideframes for railway car trucks

  • US 6,622,776 B2
  • Filed: 12/22/2000
  • Issued: 09/23/2003
  • Est. Priority Date: 01/08/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a method of making a hollow cast metal sideframe for a railway car,the sideframe having front and rear ends and a pedestal at each end, a top member extending along a longitudinal axis between the front and rear ends, a tension member having a pair of diagonal portions and a center portion, a bolster opening in the middle of the sideframe between the top member and the center portion of the tension member, a pair of vertical columns along the bolster opening, and a pair of side windows, the sideframe having an inboard side and an outboard side, the pedestals, top member, tension member and columns having interior and exterior surfaces and widths between the inboard and outboard sides, the method comprising the steps of providing cores to define the hollow interior of the sideframe, providing a mold having cope and drag mold surfaces, placing the cores in the mold, and pouring molten metal into the mold to form a sideframe casting;

  • the improvement wherein the cores include one core formed as an integral piece and having a core body including;

    a column portion for defining an interior surface of one column across the width of the column; and

    a side window portion for defining one side window, the side window portion contacting both the cope and drag mold surfaces.

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