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
Method for cutting C--Mn steel with a fiber laser
Decoding and presentation time stamps for MPEG-4 advanced video coding
Compositions of quaternary ammonium compounds containing bioavailability enhancers
Systems and methods for building axes, co-axes and paleo-geographic coordinates related to a stratified geological volume
Dynamic report mapping apparatus to physical data source when creating report definitions for information technology service management reporting for peruse of report definition transparency a
Method and system for dynamically representing distributed information
Process for the production of an acylation catalyst
  Randomly Featured Patents
Writing board
Brassiere patch closure
Stuffing machine for toy animals
Method for making a aluminum nickel base alloy electrical conductor
Magnetoresistive effect element and magnetic memory device
Facade for business risk minimization in change administration via risk estimation and mistake identification by ticket analysis
Electromagnetically induced anesthesia and sensory stimulation
Adjustable height post for a volleyball net, in particular a beach volleyball net
Memory cell, memory cell arrangement and fabrication method
Semiconductor device with lead frame having lead terminals with wide portions of trapezoidal cross section