Rail clip support shoulder
View Patent ↗Improved rail clip support shoulders are less expensive than conventional shoulders. The rail seat includes a concrete rail tie; a pair of rail clip support shoulders cast in place in said rail tie each said shoulder having a rail face between its external sides; a pair of shoulder insulators each shaped to lie against the rail face of the rail shoulder; a pair of rail clips each having a base section adapted to seat within the rail clip support shoulder and a toe section adapted to seat on the rail base, the toe section comprising a pair of bifurcated arms extending from said base section and being bent in a curve so that the toes lie adjacent but beyond the base; the arrangement being such that the clamping force exerted by each installed clip is at least 8 kilonewtons and the leading edge of the base section of the rail clip first engages a loading incline on either side of the rail clip ramp, while the line of contact of the trailing edge of base section is on the concrete rail tie and the trailing edge does not contact the rail clip ramp in the support shoulder until at least 40% of the distance to fully install the clamp has been traveled.
1. A railroad tie and rail seat assembly for supporting a rail which includes
a) a concrete rail tie;
b) a pair of rail clip support shoulders cast in place in said rail tie, each said shoulder having an anchor encased below the top surface of the concrete, a rail clip receiving section located substantially above the concrete surface, wherein both shoulder sections are coaxial, the common axis therebetween positioned at an incline relative to the concrete tie surface; each shoulder further having a rail face between its external side, a clip gateway through said rail face, a rail clip ramp inclined due to the inclination of the support shoulder and leading from the rear of the shoulder and terminating in the clip gateway at substantially the level of the rail base and a loading incline on either side of the rail clip ramp which incline is directed downwardly from the rear of the shoulder toward the clip gate way;
c) a rail pad seated on said rail tie between said support shoulders;
d) a pair of shoulder insulators each shaped to lie against the rail face of the rail shoulder;
e) a pair of rail clips each having a base section adapted to seat within the rail clip support shoulder and a toe section adapted to seat on the rail base, the toe section comprising a pair of bifurcated arms extending ending from said base section and being bent in a curve so that the toes lie adjacent but beyond the base section; and
f) the arrangement being such that the clamping force exerted by each installed clip is at least 8 kilonewtons, and when the rail clip is in a parked position, the leading edge of the base section of the rail clip engages a loading incline on either side of the rail clip ramp while the line of contact of the trailing edge of the base section is on the concrete rail tie, wherein the trailing edge does not contact the rail clip ramp in the support shoulder until at least 40% of the distance between the parked position and a fully installed position for the rail clip has been traveled.
2. A rail road tie and rail seat as claimed in claim 1 in which the trailing edge of the clip does not contact the support shoulder ramp until about 50% of the distance to fully install the clamp has been traveled.
3. A support shoulder as claimed in claim 1 in which the length of the ramp in the support shoulder is about half of the distance traveled by the rail clip when driven onto the rail.