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
Package for product
Animation control apparatus, animation control method, and non-transitory computer readable recording medium
Asynchronous line interface rate adaptation to the physical layer with synchronous lines at the connection layer
Robot control device
Preferential selection of candidates for delta compression
Bootstrap gate driver
Luggage cart
  Randomly Featured Patents
Fluid cooled disc brake for bicycle
Method of managing a call addressed to a terminal associated to an access device
Tubular skylight with snap assembly and expansion spacer
Badge
Reference voltage source with temperature-stable MOSFET amplifier
Collapsible basket
Polishing device
User-directed method for operating on an object-based model data structure through a second contextual image
Positive seal pitless well adapter
Basketball backboard