Flange bearing bolted rail frog for railroad turnouts and crossi

Details Flange bearing bolted rail frog for railroad turnouts and crossi Flange bearing bolted rail frog for railroad turnouts and crossi

1995-02-21

1996-07-02

Oberleitner, Robert J.

Railway switches and signals

Crossings, frogs, and mates

Flange-supported wheel

246463, E01B 710

Patent

active

055314090

ABSTRACT:
A bolted rail railroad frog designed to support a railroad wheel to roll through the frog on its flange rather than requiring its tread to jump across a flangeway gap. The frog is comprised of paired rail sections with a flangeway filler bar disposed therebetween to define a flangeway for the railroad wheel. Each flangeway filler bar has a ramped upper surface disposed to engage the wheel flange. Transition from the wheel riding on its tread to riding on its flange is accomplished by ramping both ends of the flangeway filler bars. When the wheel flange encounters the ramp it gradually lifts the wheel till the tread is clear of the top of rail and continues to carry the wheel over the flangeway gap and then rolls down the other ramp on the flange until the tread again is rolling on the top of the rail. A wheel riding through a frog on its flange rather than having its tread rolling across a flangeway gap will experience a much smoother ride due to the fact that the tread portion does not leap across open space at the flangeway gap. A significant aspect of the flange bearing bolted rail frog is that a primary component, the flangeway filler bars, is manufactured in standard sizes, and the flangeway filler bars are bolted in place in the crossing. This form of flange bearing crossing is adaptable to a wide range of crossing angles, and is quicker and cheaper to build and install than a flange bearing cast manganese frog.

REFERENCES:
patent: 197099 (1877-11-01), Cooke
patent: 770882 (1904-09-01), Whitehead
patent: 812877 (1906-02-01), Rankin
patent: 1067699 (1913-07-01), Wertz et al.

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