EP 0706870 A1 19960417 - Tubular saw
Title (en)
Tubular saw
Title (de)
Hohlbohrkrone mit einem hohlzylindrischen Trägerkörper
Title (fr)
Scie tubulaire
Publication
Application
Priority
DE 4436915 A 19941015
Abstract (en)
The hollow body (1) contains recesses (1c) in its forward end open in the drilling direction in which cutters (2) are inserted, these protruding in the axial direction and also beyond the body surface on the inside and outside. The body has portions (1d) of increased cross-section (1d) adjacent to the cutter recesses. The cutter recesses can protrude beyond the body wall at the inside and/or outside. The wall thickness (Q) at these points can be between 1.2 and 1.8 times that of the remainder, while their length (U) either side of the recesses can be between 0.3 and 1 times that (B) of the recesses. At the base of each recess, the thickened portion can extend away from the working direction for a distance (G) equal to between 0.5 and 1.4 times the width (B).
Abstract (de)
Die Hohlbohrkrone besteht aus einem hohlzylindrischen Trägerkörper (1) mit Schneidkörpern (2). Die Schneidkörper (2) sind in Aussparungen (1c) derart gelagert, dass die Innen- und Aussenkontur sowie die bohrrichtungsseitige Stimseite des Trägerkörpers (1) überragt wird. Im Umgebungsbereich der Aussparungen (1c) weist der Trägerkörper (1) Querschnittsverstärkungen (1d) auf, so dass ausreichend grosse Verbindungsflächen für die Schneidkörper (2) zur Verfügung stehen. <IMAGE>
IPC 1-7
IPC 8 full level
B23B 51/04 (2006.01); B28D 1/04 (2006.01); B28D 1/14 (2006.01)
CPC (source: EP KR US)
B28D 1/041 (2013.01 - EP US); B28D 1/14 (2013.01 - KR); Y10S 408/703 (2013.01 - EP US); Y10T 408/895 (2015.01 - EP US)
Citation (applicant)
- DE 3930250 A1 19910314 - LICENTIA GMBH [DE]
- CH 414438 A 19660531 - FISCHER ARTUR [DE]
Citation (search report)
- [X] US 3308689 A 19670314 - STEWART MACDONALD JAMES
- [A] DE 3408093 A1 19850905 - HILTI AG [LI]
- [A] DE 3407427 A1 19850829 - HAWERA PROBST KG HARTMETALL [DE]
- [A] EP 0340340 A1 19891108 - MEIER WOLFGANG
Designated contracting state (EPC)
AT CH DE DK FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0706870 A1 19960417; EP 0706870 B1 20010919; AT E205769 T1 20011015; CA 2160044 A1 19960416; CA 2160044 C 19981215; CN 1081116 C 20020320; CN 1129635 A 19960828; DE 4436915 A1 19960418; DE 59509611 D1 20011025; DK 0706870 T3 20011126; FI 105537 B 20000915; FI 954849 A0 19951012; FI 954849 A 19960416; HU 216525 B 19990728; HU 9502974 D0 19951228; HU T72770 A 19960528; JP H08197533 A 19960806; KR 100351536 B1 20021228; KR 960013598 A 19960522; US 5569002 A 19961029
DOCDB simple family (application)
EP 95810465 A 19950714; AT 95810465 T 19950714; CA 2160044 A 19951006; CN 95118496 A 19951013; DE 4436915 A 19941015; DE 59509611 T 19950714; DK 95810465 T 19950714; FI 954849 A 19951012; HU 9502974 A 19951013; JP 26720695 A 19951016; KR 19950031827 A 19950926; US 54208795 A 19951012