EP 0011219 A1 19800528 - Connection of fluid flow path-defining components in down-the-hole hammer drills.

Title (en)

Connection of fluid flow path-defining components in down-the-hole hammer drills.

Title (de)

Verbindung der flüssigkeitsaufnehmenden Teile von Tieflochbohrhämmern.

Title (fr)

Jonction d'éléments définissant un passage d'écoulement de fluid pour marteau perforateur mis en oeuvre au fond d'un trou de forage.

Publication

EP 0011219 A1 19800528 (EN)

Application

EP 79104336 A 19791106

Priority

GB 7844128 A 19781110

Abstract (en)

A connection for rod-like components, such as fluid flow path-defining components in a fluid powered free-piston down-the-hole hammer drill, comprising inner and outer components (7,5) having adjacent overlapping surfaces is characterised by at least one circumferential recess (9,11) in each of the overlapping surfaces, the recesses (9,11) being opposed to define one ore more annular spaces each accomodating an elastomeric sealing/retaining ring (8). The overlapping surfaces are preferably a close fit one within the other and have a plurality of said recesses (9,11) spaced-apart to accommodate correspondingly spaced rings (8) to distribute stresses between the components (7,5) and to maintain alignment thereof.

IPC 1-7

F16B 7/00; E21B 4/06; E21C 3/04

IPC 8 full level

F16B 7/00 (2006.01); E21B 4/06 (2006.01); E21B 4/14 (2006.01); E21B 17/04 (2006.01); E21B 17/07 (2006.01)

CPC (source: EP)

E21B 4/14 (2013.01); E21B 17/07 (2013.01)

Citation (search report)

DE 2551292 B2 19790719
GB 1462743 A 19770126 - BAKERDRILL INC
EP 0004946 A1 19791031 - WALTER HANS PHILIPP
US 3970335 A 19760720 - CURINGTON ALFRED R, et al
DE 2062690 B
DE 2362724 B2 19770414
DE 2609376 B2 19780105
US 3791462 A 19740212 - CURINGTON A, et al
AT 317813 B 19740910 - MISSION MFG CO [US]

Designated contracting state (EPC)

AT BE CH DE FR GB IT SE

DOCDB simple family (publication)

EP 0011219 A1 19800528; EP 0011219 B1 19830525; AT E3574 T1 19830615; DE 2965531 D1 19830707; ES 485775 A0 19801101; ES 8100418 A1 19801101; IN 152190 B 19831112; JP S5575092 A 19800606; ZA 795944 B 19801126

DOCDB simple family (application)

EP 79104336 A 19791106; AT 79104336 T 19791106; DE 2965531 T 19791106; ES 485775 A 19791107; IN 1169CA1979 A 19791109; JP 14597379 A 19791110; ZA 795944 A 19791106