EP 0533528 B1 19950607 - Improved frog and method for its production.
Title (en)
Improved frog and method for its production.
Title (de)
Verbessertes Herzstück und Verfahren zur dessen Herstellung.
Title (fr)
Coeur de croisement perfectionné et procédé pour sa fabrication.
Publication
Application
Priority
FR 9111652 A 19910920
Abstract (en)
[origin: EP0533528A1] The method for producing a frog for a railway track, particular for a tramway, from a preferably approximately parallelepipedal single rolled slab, is characterised in that - the slab (10) is partially slit longitudinally, along the axis (100), in its two end zones (11) flanking a central part (12) in order to form therein four arms (110) which are contiguous in pairs, - the contiguous arms (110) are moved apart, beyond the elastic limit, in order to give the slab (10) a permanent deformation such that its transverse dimension is that of the ends of the frog to be obtained, - the central part (12), the arms (110) and, if required, the ends (40) of these arms are machined in order particularly to form therein grooves (30) and running treads (32, 33, 34) and, if necessary, connectors. Application to railways in a site for two-way working. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
Designated contracting state (EPC)
BE CH DE ES GB IT LI LU PT SE
DOCDB simple family (publication)
EP 0533528 A1 19930324; EP 0533528 B1 19950607; DE 69202842 D1 19950713; DE 69202842 T2 19951130; EG 19446 A 19950330; ES 2073892 T3 19950816; FI 924192 A0 19920918; FI 924192 A 19930321; FI 98846 B 19970515; FI 98846 C 19970825; FR 2681618 A1 19930326; FR 2681618 B1 19931126; NO 300814 B1 19970728; NO 923652 D0 19920921; NO 923652 L 19930322
DOCDB simple family (application)
EP 92402447 A 19920907; DE 69202842 T 19920907; EG 54892 A 19920917; ES 92402447 T 19920907; FI 924192 A 19920918; FR 9111652 A 19910920; NO 923652 A 19920921