Global Patent Index - EP 1989392 A1

EP 1989392 A1 20081112 - A REVERSIBLE, PERCUSSIVE, RAM-BORING MACHINE

Title (en)

A REVERSIBLE, PERCUSSIVE, RAM-BORING MACHINE

Title (de)

UMKEHRBARE SCHLAG-, RAMMBOHRMASCHINE

Title (fr)

FOREUSE A MOUTON DE FORAGE PNEUMATIQUE ET REVERSIBLE

Publication

EP 1989392 A1 20081112 (EN)

Application

EP 07701479 A 20070214

Priority

  • AU 2007000148 W 20070214
  • AU 2006900720 A 20060214

Abstract (en)

[origin: WO2007092993A1] A superior ram-boring machine "mole", employing compressed air to drive a reciprocating piston onto either forward or rearward anvils thereby imparting momentum. Wherein a control valve received into the rear of the piston interacts with ports therein determining its stroke characteristics. The end receiving impacts, and hence the direction of action are determined by accurately positioning the control valve forwardly or rearwards. Incorporating a robust, air-on, fail-safe "Rapid Reverse" mechanism, actuated by a small rotation of the air hose. Whereby guide means and an indexing collar incorporating or comprising encompassing spring or elastic means having inter-engaging features deforms by flexing and or compression to disengage and is biased to re-engage with corresponding features to position and lock the control valve into forward and reverse settings; thereby assisting easy switching, location and retention of operating positions. The invention also provides improvements in durability, product life, ease of operation and servicing.

IPC 8 full level

E21B 11/02 (2006.01)

CPC (source: EP US)

E21B 4/145 (2013.01 - EP); Y10T 29/49826 (2015.01 - EP US)

Citation (search report)

See references of WO 2007092993A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2007092993 A1 20070823; AU 2007215377 A1 20070823; EP 1989392 A1 20081112; US 2010059277 A1 20100311

DOCDB simple family (application)

AU 2007000148 W 20070214; AU 2007215377 A 20070214; EP 07701479 A 20070214; US 16205007 A 20070214