Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Variable delay line for delay locked loop
Method and system for coordinating client and host security modules
Advanced CAPTCHA using images in sequence
Automated solar collector installation design including ability to define heterogeneous design preferences
Reconfigurable barrel shifter and rotator
Portable gaming device and gaming system combining both physical and virtual play elements
Three-dimensional filter
  Randomly Featured Patents
Process for producing pitch-based carbon fibers superior in compression characteristics
Signaling for parameterized quality of service (QoS) support
Method and apparatus for cooling fan control algorithm
Stripping apparatus for use in cathode base plate for electrolytic refining
Temperature sensor
Power transmission
Method of forming variable cross-sectional shaped three-dimensional fabrics
Diverter
System for isolating a medium voltage
Energy conservation system for heating and cooling of structures