Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method of manufacturing concrete sleeper blocks










Image Number 3 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
Mirror elements for EUV lithography and production methods therefor
Methods and systems for determining the reliability of transaction
Method and system for streaming digital video content to a client in a digital video network
Tread portion of an automobile tire
Method, apparatus, and system for synchronizing contents
6-O-substituted benzoxazole and benzothiazole compounds and methods of inhibiting CSF-1R signaling
Systems and methods for implementing pressure sensitive keyboards
  Randomly Featured Patents
Apparatus for fastening single and multiple sheets and method for using same
Cryogenic liquid heat exchanger system with fluid ejector
Product display carton
Polyester dispersants for high thermal conductivity paste
Apparatus for piezoelectric layer-wise pump and valve for use in local administration of biological response modifiers and therapeutic agents
Occupant restraint system
Converter for converting a reflection type scanner to a transparence type scanner
Method for detecting over-etch defects
External storage device having an audio function, and information processing apparatus in which the storage device can be installed
Medical device insertion