ARRANGEMENT, DRILLING MACHINE AND METHOD TO CONTROL THE MOVEMENT SPEED OF A PERCUSSIVE ELEMENT OF A DRILLING MACHINE - Patent 3938614

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EP 3 938 614 A1

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(43)	Date of publication:
	19.01.2022 Bulletin 2022/03

(21)	Application number: 20723576.3

(22)	Date of filing: 09.03.2020

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International Patent Classification (IPC):

E21B 4/14^(2006.01)
B25D 17/24^(2006.01)

B25D 9/14^(2006.01)
E21B 6/00^(2006.01)

(52)	Cooperative Patent Classification (CPC):
	B25D 9/26; E21B 6/00; B25D 9/145; E21B 4/14

(86)	International application number:
	PCT/SE2020/050255

(87)	International publication number:
	WO 2020/185149 (17.09.2020 Gazette 2020/38)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME
	Designated Validation States:
	KH MA MD TN

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Priority:

14.03.2019 SE 1950321

(71)	Applicant: Epiroc Rock Drills Aktiebolag
	701 91 Örebro (SE)

(72)	Inventor:
	PETTERSSON, Maria 715 92 Stora Mellösa (SE)

(74)	Representative: Valea AB
	Box 7086 103 87 Stockholm 103 87 Stockholm (SE)

(54)	ARRANGEMENT, DRILLING MACHINE AND METHOD TO CONTROL THE MOVEMENT SPEED OF A PERCUSSIVE ELEMENT OF A DRILLING MACHINE