EP 3278934 B1 20210224 - AIR TOOL WITH HELMHOLTZ SILENCER
Title (en)
AIR TOOL WITH HELMHOLTZ SILENCER
Title (de)
PNEUMATISCHES WERKZEUG MIT HELMHOLTZ-SCHALLDÄMPFER
Title (fr)
OUTIL PNEUMATIQUE DOTÉ D'UN DISPOSITIF SILENCIEUX DE TYPE HELMHOLTZ
Publication
Application
Priority
- JP 2015070984 A 20150331
- JP 2016060001 W 20160329
Abstract (en)
[origin: EP3278934A1] [Technical Problem] Provided is an air tool configured to reduce noise from an air discharge path. [Solution to Problem] An air tool (10) has a silencer member (40) provided in an air discharge path (30) in a housing (16) along a longitudinal direction of the air discharge path to divide the interior of the air discharge path into resonance chambers (46, 48) extending along the longitudinal direction of the air discharge path and an air discharge passage (50) extending in the longitudinal direction adjacently to the resonance chambers and divided from the resonance chambers to receive and pass exhaust air from a motor chamber (20) to a downstream outlet (30a). The silencer member (40) has openings (54) communicating between the air discharge passage (50) and the resonance chambers (46, 48). The openings (54) and the resonance chambers (46, 48) constitute a sound-damping chamber using Helmholtz resonance.
IPC 8 full level
CPC (source: EP)
B25F 5/00 (2013.01); F01N 1/023 (2013.01); F01N 1/026 (2013.01); F01N 13/002 (2013.01); F01N 1/04 (2013.01); F01N 2310/02 (2013.01); F01N 2470/02 (2013.01); F01N 2490/02 (2013.01); F01N 2590/06 (2013.01)
Designated contracting state (EPC)
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
DOCDB simple family (publication)
EP 3278934 A1 20180207; EP 3278934 A4 20181121; EP 3278934 B1 20210224; CN 107405766 A 20171128; CN 107405766 B 20200626; JP 2016190288 A 20161110; JP 6382143 B2 20180829; KR 101959160 B1 20190315; KR 20170128466 A 20171122; TW 201703944 A 20170201; TW I601608 B 20171011; WO 2016158891 A1 20161006
DOCDB simple family (application)
EP 16772772 A 20160329; CN 201680019528 A 20160329; JP 2015070984 A 20150331; JP 2016060001 W 20160329; KR 20177029227 A 20160329; TW 105109245 A 20160324