Frogs Patents (Class 246/468)
Unbroken main (Class 246/469)
Clamped (Class 246/470)
Composite (Class 246/471)
  • Railway switch heel block
    Patent number: 4283030
    Abstract: Apparatus for providing the proper spread between the switch rail and stock rail in a railway switch which includes a heel block of unique design which assures accurate alignment of the parts of the switch heel block.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: August 11, 1981
    Assignee: Bethlehem Steel Corporation
    Inventor: Frank P. Bobb
  • Railroad frogs
    Patent number: 4081162
    Abstract: Wheel loads on the running surfaces of a frog point and its (cast) integral wings are distributed to the ties by a bottom wall boxing in the side walls which support those running surfaces and by strategically located center ribs.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: March 28, 1978
    Assignee: Abex Corporation
    Inventor: Earl E. Frank
  • Railroad turnouts
    Patent number: 4005839
    Abstract: A railroad turnout including a switch having runoff plates with stop lugs spaced farther apart than the width of the switch point base so that flexure of the switch points downstream of the heel spread is permitted. Floating heel blocks are affixed to the stock rails at the heel point to maintain the conventional heel spread. A smooth ride through the turnout is further assured by additional switch rods, uniform risers in the switch and guard rails associated with the frog of the turnout.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: February 1, 1977
    Assignee: Abex Corporation
    Inventor: Earl E. Frank