ITMC20090258A1 - INTEGRAL MOTORCYCLING HELMET WITH PROTUBERANCES FOR THE REDUCTION OF THE PERCEIVED RUNORE DUE TO AERODYNAMIC PHENOMENA. - Google Patents

INTEGRAL MOTORCYCLING HELMET WITH PROTUBERANCES FOR THE REDUCTION OF THE PERCEIVED RUNORE DUE TO AERODYNAMIC PHENOMENA. Download PDF

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Publication number
ITMC20090258A1
ITMC20090258A1 IT000258A ITMC20090258A ITMC20090258A1 IT MC20090258 A1 ITMC20090258 A1 IT MC20090258A1 IT 000258 A IT000258 A IT 000258A IT MC20090258 A ITMC20090258 A IT MC20090258A IT MC20090258 A1 ITMC20090258 A1 IT MC20090258A1
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IT
Italy
Prior art keywords
helmet
protuberances
perceived
reduction
integral
Prior art date
Application number
IT000258A
Other languages
Italian (it)
Inventor
Mauro Claudi
Original Assignee
Mauro Claudi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mauro Claudi filed Critical Mauro Claudi
Priority to ITMC2009A000258A priority Critical patent/IT1397159B1/en
Publication of ITMC20090258A1 publication Critical patent/ITMC20090258A1/en
Application granted granted Critical
Publication of IT1397159B1 publication Critical patent/IT1397159B1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/0493—Aerodynamic helmets; Air guiding means therefor
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/16—Ear protection devices
    • A42B3/163—Wind or noise deflectors

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Fluid Mechanics (AREA)
  • Helmets And Other Head Coverings (AREA)

Description

DESCRIZIONE DESCRIPTION

L'invenzione si riferisce ad un casco integrale da motociclismo avente protuberanze per la riduzione del rumore percepito dovuto a fenomeni aerodinamici. The invention relates to a full-face motorcycle helmet having protuberances for reducing the perceived noise due to aerodynamic phenomena.

Nei caschi tradizionali da motociclo à ̈ fatto noto che, anche a velocità normali di crociera, si percepiscano fastidiosi rumori dovuti a moti turbolenti dell'aria. In traditional motorcycle helmets it is known that, even at normal cruising speeds, annoying noises due to turbulent air motions are perceived.

Tali rumori sono percepiti all'udito come variazioni di pressione sonora ad alta frequenza i quali, nel lungo periodo, possono causare danni all'apparato uditivo e disturbi di tipo psicosomatico. These noises are perceived to the hearing as high frequency sound pressure variations which, in the long term, can cause damage to the hearing system and psychosomatic disturbances.

Svariate sono le soluzioni che sono state proposte a questo problema. Various solutions have been proposed to this problem.

Negli ultimi anni l'attenzione si à ̈ rivolta ad una cancellazione attiva del rumore (ANC), metodo basato nella generazione di un'onda sonora della stessa ampiezza del rumore captato, ma di fase opposta che, con la sovrapposizione, cancella la prima onda. In recent years, attention has turned to an active noise cancellation (ANC), a method based on the generation of a sound wave of the same amplitude as the noise picked up, but of opposite phase which, with the superposition, cancels the first wave. .

Da un punto di vista aerodinamico, invece, sono stati sviluppati: From an aerodynamic point of view, on the other hand, the following have been developed:

US4229836 (A) consistente in un materiale comprimibile da apporre tra casco e visiera; US4229836 (A) consisting of a compressible material to be affixed between helmet and visor;

US4370758 (A) alette svasate da applicare ai lati del casco che aumentano di spessore verso la parte posteriore e superiore del casco; US4370758 (A) flared fins to be applied to the sides of the helmet which increase in thickness towards the back and top of the helmet;

WO02076253 (Al) collare da posizionare nella parte inferiore del casco; WO02076253 (A1) collar to be positioned in the lower part of the helmet;

DEIO 103207 (CI ) copertura dell'apertura per rinserimento della testa con bande dì garza. DEIO 103207 (CI) cover of the opening for reinserting the head with gauze bands.

In particolare gli ultimi due riferimenti si concentrano nel limitare o modificare le turbolenze dell'aria che si creano nel foro per l'inserimento dalla testa del pilota, poiché esse si sono dimostrate essere uno dei maggiori fattori di generazione del rumore. In particular, the last two references focus on limiting or modifying the air turbulences that are created in the hole for insertion from the pilot's head, since they have proved to be one of the major factors of noise generation.

Si evince dalla Fig. 2 che l'aria, nel suo moto relativo verso il casco, lambisce il foro per rinserimento della testa e crea in esso le turbolenze che generano rumore. It can be seen from Fig. 2 that the air, in its relative motion towards the helmet, laps the hole for re-insertion of the head and creates the turbulences that generate noise in it.

La presente invenzione consiste in due protuberanze longilinee di piccolo spessore, schematicamente rappresentate in Fig. 1, che sporgono da entrambi i lati del casco integrale nella parte inferiore della visiera e verso la parte anteriore del casco (Fig. 3). Sebbene un flusso laminare in tutto il casco à ̈ noto per essere significativamente più silenzioso di un flusso di aria turbolento, nella presente invenzione si vuole proprio creare una turbolenza sotto le due alette. The present invention consists of two thin long-limbed protuberances, schematically represented in Fig. 1, which protrude from both sides of the integral helmet in the lower part of the visor and towards the front of the helmet (Fig. 3). Although laminar flow throughout the helmet is known to be significantly quieter than turbulent air flow, in the present invention we want to create turbulence under the two fins.

La turbolenza à ̈ caratterizzata da elevate velocità e basse pressioni. Turbulence is characterized by high speeds and low pressures.

La bassa pressione della turbolenza creata devia il flusso dell'aria sottostante che non va più a lambire il foro per l'inserimento della testa. The low pressure of the turbulence created diverts the underlying air flow which no longer touches the hole for the insertion of the head.

Questa nuova turbolenza non viene percepita dal conducente poiché à ̈ esterna al casco. L'effetto à ̈ schematizzato in Fig. 3. This new turbulence is not perceived by the driver as it is external to the helmet. The effect is schematized in Fig. 3.

Al posto delle due protuberanze se ne può apporre anche una unica. In place of the two protuberances, a single one can also be affixed.

Nel caso il casco non sia progettato con tale dispositivo, si possono apporre due alette di materiale flessibile per adattarsi al casco tramite nastro biadesivo. Tale materiale If the helmet is not designed with this device, two wings of flexible material can be affixed to adapt to the helmet using double-sided tape. Such material

Claims (1)

RIVENDICAZIONI 1. Casco integrale da motociclismo avente protuberanze per la riduzione del rumore percepito dovuto a fenomeni aerodinamici, caratterizzato da alette (1) longilinee di piccolo spessore poste sotto la visiera (3) e verso la parte anteriore del casco (2), le quali provocano una turbolenza che devia il flusso dell'aria (4); 2. Casco, secondo la rivendicazione sub. 1, caratteri zzato dal fatto che l'aletta (1) può anche essere unica; 3. Casco, secondo le rivendicazioni sub. 1 o 2, caratterizzato dal fatto che, se non à ̈ progettato secondo le rivendicazioni sub. 1 o 2, le alette (1), fatte in materiale flessibile e resistente al vento e all'acqua, possono essere attaccate al casco fi) con del nastro bi-adesivo.CLAIMS 1. Full-face motorcycle helmet with protuberances for the reduction of perceived noise due to aerodynamic phenomena, characterized by thin long-limbed fins (1) placed under the visor (3) and towards the front of the helmet (2), which cause a turbulence that deflects the flow of air (4); 2. Helmet, according to claim sub. 1, characterized by the fact that the flap (1) can also be unique; 3. Helmet, according to the sub-claims. 1 or 2, characterized in that, if it is not designed according to claims sub. 1 or 2, the fins (1), made of flexible material resistant to wind and water, can be attached to the helmet fi) with double-sided tape.
ITMC2009A000258A 2009-12-29 2009-12-29 INTEGRAL MOTORCYCLING HELMET WITH PROTUBERANCES FOR THE REDUCTION OF THE PERCEIVED RUNORE DUE TO AERODYNAMIC PHENOMENA. IT1397159B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ITMC2009A000258A IT1397159B1 (en) 2009-12-29 2009-12-29 INTEGRAL MOTORCYCLING HELMET WITH PROTUBERANCES FOR THE REDUCTION OF THE PERCEIVED RUNORE DUE TO AERODYNAMIC PHENOMENA.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMC2009A000258A IT1397159B1 (en) 2009-12-29 2009-12-29 INTEGRAL MOTORCYCLING HELMET WITH PROTUBERANCES FOR THE REDUCTION OF THE PERCEIVED RUNORE DUE TO AERODYNAMIC PHENOMENA.

Publications (2)

Publication Number Publication Date
ITMC20090258A1 true ITMC20090258A1 (en) 2011-06-30
IT1397159B1 IT1397159B1 (en) 2013-01-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
ITMC2009A000258A IT1397159B1 (en) 2009-12-29 2009-12-29 INTEGRAL MOTORCYCLING HELMET WITH PROTUBERANCES FOR THE REDUCTION OF THE PERCEIVED RUNORE DUE TO AERODYNAMIC PHENOMENA.

Country Status (1)

Country Link
IT (1) IT1397159B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370758A (en) * 1980-10-27 1983-02-01 Mattheis Dale B Sound attenuator for use in conjunction with the motorcycle helmet or the like
EP0131929A2 (en) * 1983-07-15 1985-01-23 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Safety helmet for motor cyclists
DE20101053U1 (en) * 2000-01-21 2001-05-17 Schuberth Werk Kg crash helmet
US6553580B1 (en) * 1998-03-18 2003-04-29 Dale L. Henson Method of protecting a helmet shell and interrupting airflow around the shell with a removable strip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370758A (en) * 1980-10-27 1983-02-01 Mattheis Dale B Sound attenuator for use in conjunction with the motorcycle helmet or the like
EP0131929A2 (en) * 1983-07-15 1985-01-23 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Safety helmet for motor cyclists
US6553580B1 (en) * 1998-03-18 2003-04-29 Dale L. Henson Method of protecting a helmet shell and interrupting airflow around the shell with a removable strip
DE20101053U1 (en) * 2000-01-21 2001-05-17 Schuberth Werk Kg crash helmet

Also Published As

Publication number Publication date
IT1397159B1 (en) 2013-01-04

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