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1. WO2002005697 - A SUCTION APPARATUS WITH NOISE REDUCION MEANS

Publication Number WO/2002/005697
Publication Date 24.01.2002
International Application No. PCT/DK2001/000465
International Filing Date 03.07.2001
Chapter 2 Demand Filed 23.01.2002
IPC
A47L 9/00 2006.1
AHUMAN NECESSITIES
47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
9Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
F04D 29/66 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
66Combating cavitation, whirls, noise, vibration, or the like; Balancing
CPC
A47L 9/0081
AHUMAN NECESSITIES
47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
LDOMESTIC WASHING OR CLEANING
9Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
0081Means for exhaust-air diffusion; Means for sound or vibration damping
F04D 29/665
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
66Combating cavitation, whirls, noise, vibration or the like
661especially adapted for elastic fluid pumps
663Sound attenuation
665by means of resonance chambers or interference
Applicants
  • NILFISK-ADVANCE A/S [DK]/[DK] (AllExceptUS)
  • LARSEN, Peter, Nøhr [DK]/[DK] (UsOnly)
Inventors
  • LARSEN, Peter, Nøhr
Agents
  • PATENTGRUPPEN APS
Priority Data
00202505.414.07.2000EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A SUCTION APPARATUS WITH NOISE REDUCION MEANS
(FR) APPAREIL D'ASPIRATION EQUIPE D'ORGANES DE REDUCTION DE BRUIT
Abstract
(EN) The invention concerns a suction apparatus with noise reduction means (7, 8) in one or more airflow passages (2, 3, 4) for reducing noise emission from an airflow generator (1) or the like, wherein at least one airflow passage (2, 3, 4) is provided with at least one indentation (7) with a predetermined depth (D) extending substantially perpendicularly to the general direction of the noise in the passage. By the invention, a suction apparatus with noise reduction means is provided which is simple and efficient at reducing noise and also inexpensive to manufacture.
(FR) L'invention concerne un appareil d'aspiration équipé d'organes (7, 8) de réduction de bruit dans un ou plusieurs passages (2, 3, 4) de circulation d'air servant à réduire les émissions de bruit d'un générateur (1) de circulation d'air ou autre dispositif semblable, comprenant au moins un passage (2, 3, 4) de circulation d'air avec au moins une empreinte (7) d'une profondeur prédéterminée (P) s'étendant sensiblement perpendiculairement à la direction générale du bruit dans le passage. L'appareil d'aspiration équipé d'organes de réduction de bruit de l'invention est simple, permet de réduire efficacement le bruit, et est peu coûteux à fabriquer.
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