Invention Grant
- Patent Title: Hydraulic percussive arrangement, piston guide and drilling rig
- Patent Title (中): 液压冲击装置,活塞导轨和钻机
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Application No.: US13261412Application Date: 2011-03-22
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Publication No.: US09132540B2Publication Date: 2015-09-15
- Inventor: Per Jonsson
- Applicant: Per Jonsson
- Applicant Address: SE Orebro
- Assignee: Atlas Copco Rock Drills AB
- Current Assignee: Atlas Copco Rock Drills AB
- Current Assignee Address: SE Orebro
- Agent Mark P. Stone
- Priority: SE1050316 20100401
- International Application: PCT/SE2011/050313 WO 20110322
- International Announcement: WO2011/123020 WO 20111006
- Main IPC: E21B31/113
- IPC: E21B31/113 ; B25D17/06 ; B25D9/12

Abstract:
The present invention relates to a hydraulic percussive arrangement comprising a displaceable arrangement (1) in a casing (11), in which casing (11) the following are arranged at the displaceable arrangement (1): a first chamber (5) connected to a return line (7) for hydraulic oil, a bushing (6) on a first side of the first chamber (5) and separated from the first chamber (5) by a first gap (12) along the displaceable arrangement (1), and a second chamber (2) with a higher pressure of hydraulic oil than that of the first chamber (5) and arranged on a second side of the first chamber (5), separated from the first chamber (5) by a second gap (4) along the displaceable arrangement (1). According to the invention, a third chamber (8) is fixed arranged between the second gap (4) and the first chamber (5) and the third chamber (8) is connected to the first chamber (5) not only by a first passage (14) but also by a third gap (9) along the displaceable arrangement (1). The invention relates also to a piston guide in such a hydraulic percussive arrangement and to a drilling rig with such a percussive arrangement.
Public/Granted literature
- US20130000939A1 HYDRAULIC PERCUSSIVE ARRANGEMENT, PISTON GUIDE AND DRILLING RIG Public/Granted day:2013-01-03
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