Title (en)

PROCESS FOR REPAIRING RAILWAY FASTENINGS ON WOODEN SLEEPERS AND SLEEPER SCREW FOR PURPOSE OF REPAIR

Publication

EP 0389746 A3 19910612 (DE)

Application

EP 90101041 A 19900119

Priority

DE 3909826 A 19890325

Abstract (en)

[origin: EP0389746A2] The invention relates to a process for repairing railway fastenings on wooden sleepers. After removing the old sleeper screw, which becomes loose in the course of time due to rotting of the wood, a thread is cut into the passage holes (11) of the ribbed sole-plate (2). New sleeper screws (33) with a single or double thread (37, 39) having a greater volume than the thread of the old sleeper screw are screwed into the boreholes (11) of the sleeper (1). One thread (37) of this single or double thread (37, 39) has a larger outside diameter that the passage hole (9) of the ribbed sole-plate (2). This thread (37) is matched to the thread (30) cut into the ribbed sole-plate (2). To permit simple guiding of the new sleeper screw (3) into the borehole (11) of the sleeper (1), the old cut-in thread (12) is used for guiding a thread cutter when cutting the thread (30) into the ribbed sole-plate (2) and for the new sleeper screw (33). Fig. 6 is intended for the abstract. <IMAGE>

IPC 1-7

E01B 31/24; E01B 9/10

IPC 8 full level

E01B 9/10 (2006.01); E01B 31/24 (2006.01)

CPC (source: EP)

E01B 9/10 (2013.01); E01B 31/24 (2013.01)

Citation (search report)

• [X] US 3861269 A 19750121 - LAVERTY RICHARD C
• [YD] FR 1102146 A 19551017 - BOULONNERIES & FERRONNERIES D

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IT LI LU NL SE

DOCDB simple family (publication)

EP 0389746 A2 19901003; EP 0389746 A3 19910612; EP 0389746 B1 19930922; AT E94925 T1 19931015; DE 3909826 A1 19901004; DE 3909826 C2 19910418; DE 59002789 D1 19931028; DE 9001195 U1 19900726; ES 2059838 T3 19941116

DOCDB simple family (application)

EP 90101041 A 19900119; AT 90101041 T 19900119; DE 3909826 A 19890325; DE 59002789 T 19900119; DE 9001195 U 19900203; ES 90101041 T 19900119