EP 1542810 A1 20050622 - AN AIR-DRIVEN LOW FREQUENCY SOUND GENERATOR AND A METHOD FOR REGULATING THE PISTON IN SUCH A GENERATOR
Title (en)
AN AIR-DRIVEN LOW FREQUENCY SOUND GENERATOR AND A METHOD FOR REGULATING THE PISTON IN SUCH A GENERATOR
Title (de)
LUFTBETRIEBENER NIEDERFREQUENZ-SCHALLGENERATOR UND VERFAHREN ZUR REGULIERUNG DES KOLBENS IN SOLCH EINEM GENERATOR
Title (fr)
GENERATEUR DE SONS BASSE FREQUENCE A ENTRAINEMENT PNEUMATIQUE ET PROCEDE DE REGULATION DU PISTON D'UN GENERATEUR DE CE TYPE
Publication
Application
Priority
- SE 0301234 W 20030721
- SE 0202291 A 20020722
Abstract (en)
[origin: WO2004009255A1] The invention relates to an air-driven, low frequency sound generator comprising an open resonator (2) working as a sound emitter and also comprising a feeder unit, for the generation of standing, gas-borne sound waves, which sound waves produce a varying sound pressure inside said resonator. The feeder unit includes a cylinder (5) with one open end facing said open resonator and communicating therewith, further including a piston (4) performing a reciprocating movement inside said cylinder, and also including a surge tank (7), at least partly surrounding said cylinder and connected to a first pressure gas source (9), for feeding pressure gas into the surge tank and further into said cylinder via at least one connection opening (10) arranged in a wall of said cylinder. The sound generator further comprises means (14, 15) for bringing said piston (4) to a stand-still position, in which said connection opening is blocked by the piston, by exerting an additional pressure on the upper end of said piston. The invention also relates to a corresponding method.
IPC 1-7
IPC 8 full level
CPC (source: EP)
B06B 1/183 (2013.01); B08B 7/02 (2013.01)
Citation (search report)
See references of WO 2004009255A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004009255 A1 20040129; AT E317731 T1 20060315; AU 2003247312 A1 20040209; DE 60303608 D1 20060420; DE 60303608 T2 20061207; DK 1542810 T3 20060515; EP 1542810 A1 20050622; EP 1542810 B1 20060215; ES 2257695 T3 20060801; SE 0202291 D0 20020722; SE 0202291 L 20040123; SE 524605 C2 20040831
DOCDB simple family (application)
SE 0301234 W 20030721; AT 03765419 T 20030721; AU 2003247312 A 20030721; DE 60303608 T 20030721; DK 03765419 T 20030721; EP 03765419 A 20030721; ES 03765419 T 20030721; SE 0202291 A 20020722