EP 0428181 A1 19910522 - Percussion tool for drilling holes in the soil.
Title (en)
Percussion tool for drilling holes in the soil.
Title (de)
Schlagwerkzeug zum Bohren von Löchern in den Boden.
Title (fr)
Outil à percussion pour forer des puits dans le sol.
Publication
Application
Priority
- EP 86302534 A 19860404
- US 72058285 A 19850405
- US 72280785 A 19850412
- US 72379285 A 19850416
Abstract (en)
A percussion tool for drilling holes in the soil comprising a cylindrical housing with a front end (1029) shaped for boring, a first means on said front end for applying a boring force to the soil. a second means in said housing for applying a percussive force to said boring force applying means, characterised in that said housing having front (1021) and rear (1022) portions of a selected outside continuous constant diameter providing two spaced continuous circumferential zones of frictional contact with the soil during boring, said front and rear portions being operable to reduce friction with the wall of the bore formed by the tool and to permit the tool to turn in its path along a shorter radius.
IPC 1-7
IPC 8 full level
E21B 4/14 (2006.01); E21B 7/06 (2006.01); E21B 7/26 (2006.01); E21B 47/022 (2012.01); E21B 47/12 (2012.01)
CPC (source: EP US)
E21B 4/145 (2013.01 - EP); E21B 7/068 (2013.01 - EP); E21B 7/267 (2020.05 - EP US); E21B 47/0228 (2020.05 - EP); E21B 47/13 (2020.05 - EP)
Citation (search report)
- US 4396073 A 19830802 - REICHMAN JAMES M, et al
- DE 2911419 A1 19801113 - DRESDNER BANK AG FRANKFURT FIL
- US 3794128 A 19740226 - GAGEN P, et al
- US 3525405 A 19700825 - COYNE JAMES C, et al
- US 3952813 A 19760427 - CHEPURNOI NIKOLAI PROKHOROVICH, et al
- US 3888319 A 19750610 - BOURNE JR HENRY A, et al
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0202013 A2 19861120; EP 0202013 A3 19880803; EP 0202013 B1 19930303; AT E109866 T1 19940815; AT E132226 T1 19960115; AT E86355 T1 19930315; AU 5565286 A 19861009; AU 589615 B2 19891019; CA 1255651 A 19890613; CA 1274817 A 19901002; DE 3650026 D1 19940915; DE 3650026 T2 19941201; DE 3650461 D1 19960208; DE 3650461 T2 19960515; DE 3687855 D1 19930408; DE 3687855 T2 19930701; EP 0428180 A1 19910522; EP 0428180 B1 19951227; EP 0428181 A1 19910522; EP 0428181 B1 19940810
DOCDB simple family (application)
EP 86302534 A 19860404; AT 86302534 T 19860404; AT 90122530 T 19860404; AT 90122531 T 19860404; AU 5565286 A 19860404; CA 505910 A 19860404; CA 602247 A 19890608; DE 3650026 T 19860404; DE 3650461 T 19860404; DE 3687855 T 19860404; EP 90122530 A 19860404; EP 90122531 A 19860404