EP 0958072 A4 20100630 - IMPROVEMENTS RELATING TO SCREWS AND THREADFORMS
Title (en)
IMPROVEMENTS RELATING TO SCREWS AND THREADFORMS
Title (de)
VERBESSERUNGEN AN SCHRAUBEN UND GEWINDEN
Title (fr)
AMELIORATIONS APPORTEES AUX VIS ET AUX FILETAGES
Publication
Application
Priority
- AU 9800933 W 19981110
- AU PP026497 A 19971110
- AU PP026597 A 19971110
- AU PP436298 A 19980626
Abstract (en)
[origin: WO9924191A1] A screw thread having a threadform comprising a ridge (21) rising from root (23) to crest (26) with the crest having two peaks (27, 28) separated by a through (29) the depth of which is less than the height of the ridge from root to crest. It has particular use as a screw for timber, and is especially suited to fixing railway rails to sleepers.
IPC 1-7
IPC 8 full level
B21H 3/02 (2006.01); E01B 9/10 (2006.01); F16B 33/02 (2006.01)
CPC (source: EP)
B21H 3/02 (2013.01); E01B 9/10 (2013.01); F16B 33/02 (2013.01)
Citation (search report)
- [X] WO 7900280 A1 19790531 - TOMOYASU Y [JP]
- [X] US 422307 A 18900225
- [XA] EP 0682187 A2 19951115 - BERGNER RICHARD GMBH CO [DE]
- [XA] US 2656740 A 19531027 - BEDKER LEO W
- [A] US 3207023 A 19650921 - KARL KNOHL FRIEDRICH
- See references of WO 9924191A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9924191 A1 19990520; CA 2277476 A1 19990520; CA 2277476 C 20090113; EP 0958072 A1 19991124; EP 0958072 A4 20100630; NZ 336714 A 20010330
DOCDB simple family (application)
AU 9800933 W 19981110; CA 2277476 A 19981110; EP 98952439 A 19981110; NZ 33671498 A 19981110