Rail seat crown and concrete rail tie having the same
OwnerJohn K Martininventor
Life of this patent
Estimating the term…
Abstract
A concrete rail tie has an elongated tie body made of a first concrete material. The elongated tie body has an elongated top surface having a shaped profile. A preformed rail seat crown made of a second concrete material is embedded in the elongated tie body and disposed at a rail seat location of the elongated tie body. The preformed rail seat crown has top side flush with and shaped to match the shaped profile of the elongated top surface of the elongated tie body. And the second concrete material has a greater compressive strength and a greater flexural strength than the first concrete material.
Claims10
A concrete rail tie comprising:
- an elongated tie body made of a first concrete material, said elongated tie body having an elongated top surface having a shaped profile;
- a preformed rail seat crown made of a second concrete material, said preformed rail seat crown embedded in said elongated tie body and disposed at a rail seat location of said elongated tie body, said preformed rail seat crown having top side flush with and shaped to match said shaped profile of said elongated top surface of said elongated tie body;
- wherein said second concrete material has a greater compressive strength and a greater flexural strength than said first concrete material;
- and
- wherein the compressive strength of the first concrete material is between 15 and 50 MPa, the flexural strength of the first concrete material is between 3 and 7 MPa, the compressive strength of the second concrete material is between 100 and 150 MPa, and the flexural strength of the second concrete material is between 20 and 50 MPa.
A concrete rail tie comprising:
- an elongated tie body made of a first concrete material, said elongated tie body having an elongated top surface having a shaped profile;
- a preformed rail seat crown made of a second concrete material, said preformed rail seat crown embedded in said elongated tie body and disposed at a rail seat location of said elongated tie body, said preformed rail seat crown having top side flush with and shaped to match said shaped profile of said elongated top surface of said elongated tie body, said preformed rail seat crown having a pair of opposite lateral edges each having a notch in which is disposed a rail clip shoulder of said elongated tie body;
- wherein said second concrete material has a greater compressive strength and a greater flexural strength than said first concrete material;
- wherein said second concrete material is reinforced by metal fibers;
- and
- wherein the compressive strength of the first concrete material is between 15 and 50 MPa, the flexural strength of the first concrete material is between 3 and 7 MPa, the compressive strength of the second concrete material is between 100 and 150 MPa, and the flexural strength of the second concrete material is between 20 and 50 MPa.
Dependencies are inferred from the claim text.