Resources Contact Us Home
Method of manufacturing concrete sleeper blocks

Image Number 2 for United States Patent #4495127.

A method of manufacturing railway switchpoint concrete sleeper blocks of varying lengths and having different number of attachment means located in mutually different positions for the attachment of rails. A plurality of steel matrix plates 102 whose respective lengths correspond to the desired lengths of the various sleeper blocks and which exhibit detachably mounted dowels 109 are placed end to end in an elongate mould bed with the dowels facing upwardly, whereafter reinforcing rods 5 are tensioned and concrete is poured into the mould bed and permitted to harden. The thus formed coherent concrete body is then removed from the mould and the matrix plates removed, with the dowels remaining cast in the concrete block. The concrete body is then cut into sleeper blocks of desired length. The dowels are accurately mounted in predetermined positions in frame members 111 affixed to the matrix plates. Upon casting and hardening of the sleeper blocks the frame members are disengaged from the plates and the in-cast dowels for renewed use in a subsequent casting operation.

  Recently Added Patents
Double diffused metal oxide semiconductor device and manufacturing method thereof
System and method for detecting states
Electronic device including predicted frequency error estimation of a voltage controlled oscillator and related methods
Video editing apparatus
Technique for effectively providing program material in a cable television system
Medical injector
Systems and methods for a signed magnitude adder in one's complement logic
  Randomly Featured Patents
Shield and collimator pasting deposition chamber with a side pocket for pasting the bottom of the collimator
Method of playing double hand marquez
Method of optimizing the transmission of idle beacon messages and a communications system using the method
End connector for coaxial cable
Apparatus and method for producing dried, chopped strands
Arc light
Seat belt retractor with tension eliminating mechanism
Glass bottle pulverizing apparatus
Clamping chuck for holding drilling and/or cutting tools
Solubilized yellow dyes for inks with improved ozone and light stability