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
Computer network running a distributed application
Single well reservoir characterization apparatus and methods
Communication apparatus, communication method, and program for exchanging data with a target
Methods, systems, and products for providing communications services
Synchronization of sound generated in binaural hearing system
Methods and apparatus to identify exposure to 3D media presentations
Battery power management system and method
  Randomly Featured Patents
Alkylene phosphonate acid ester polyols
Data bus fault detector
Injection mold and partial compression molding method
Data access and address translation for retrieval of data amongst multiple interconnected access nodes
Pickling device
Random chance game device
Spinning filter separation system for oil spill clean-up operation
Apparatus for controlling run of a car, and car using the apparatus
Delivery of fuel in internal combustion engines
Display device and process of producing the same