EP 0147262 B1 19880608 - SOUND-ATTENUATING HOUSING FOR PNEUMATIC DRILLS
Title (en)
SOUND-ATTENUATING HOUSING FOR PNEUMATIC DRILLS
Publication
Application
Priority
FR 8317900 A 19831110
Abstract (en)
[origin: US4624339A] The internal absorbent layer (9) of the casing delimits an internal volume (10) around the drill (1), which volume is divided on either side of the exhaust orifice (3) by two transverse partitions (13A, 13B) into three successive expansion chambers (11A, 11B, 11C) between the exhaust orifice (3) and the outlet opening (12) to the air outside the casing.
IPC 1-7
IPC 8 full level
B25D 17/00 (2006.01); B25D 17/11 (2006.01); B25D 17/12 (2006.01); E21B 1/00 (2006.01); E21B 1/30 (2006.01); F02B 77/13 (2006.01)
CPC (source: EP US)
B25D 17/00 (2013.01 - EP US); B25D 17/11 (2013.01 - EP US); B25D 17/12 (2013.01 - EP US); F02B 77/13 (2013.01 - EP US); Y10S 173/02 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
US 4624339 A 19861125; AT E34933 T1 19880615; AU 3529784 A 19850516; AU 562897 B2 19870618; DE 3471897 D1 19880714; EP 0147262 A1 19850703; EP 0147262 B1 19880608; ES 291672 U 19860501; ES 291672 Y 19870116; FR 2554752 A1 19850517; FR 2554752 B1 19861226; JP S60173288 A 19850906; ZA 848781 B 19850731
DOCDB simple family (application)
US 66773584 A 19841102; AT 84402259 T 19841109; AU 3529784 A 19841109; DE 3471897 T 19841109; EP 84402259 A 19841109; ES 291672 U 19841106; FR 8317900 A 19831110; JP 23424184 A 19841108; ZA 848781 A 19841109