About us


CHRYSADEV was born out of a creative passion, a passion for the sea, a passion for entrepreneurship, a passion for innovation, and a passion for technical challenges. Founded in 2015, Chrysadev specializes in developing marine equipment for recreational boats.

Bruno Rabu, the founder, served as Groupe Merial’s Director of Investments for a number of years, before facing health problems that forced him to make changes in his professional life, leisure activities, and passions. CHRYSADEV’s products grew out of his efforts to adapt his sailing practice to his new needs, while maintaining the fun and athletic aspects of the activity.

In 2016, after close to 3 years of research and development, Chrysadev unveiled its “technological gem,” for which 3 patent applications have been filed: the first power-assisted and connected winch handle.

logo de la ewincher : manivelle de winch à assistance électrique connectée

« My objective is to develop and market a range of innovative technological products that will make sailing easier without altering the experience, in order to maintain the thrill and pleasure of being out on the water »

Bruno Rabu, Chrysadev’s founder

cockpit du bateau thera explorer au coucher du soleil, photo Serge Briez, copyright Cap médiations pour Chrysadev, http://serge-briez.com


CHRYSADEV has surrounded itself with the best talents in mechatronics – a combination of mechanics, materials, electronics, automation, and real-time information technology – to design innovative products that are practical, easy to use, and perfectly adapted to all kinds of sailing.

The key figures involved in creating eWINCHER:

Overall desig:

  • Bruno RABU
  • Raphaël BOURRET

Electronic solutions were developed with ONWI:

  • Hervé ROUILLE
  • Romain LAMOTTE

Mechanical production was supported by AMGE:

  • Laurent PERONNET

Graphic design was finalized with the support of Cap Médiations:

  • Serge Briez

Protection of Intellectual Property was ensured by LAURENT ET CHARRAS:

  • Stéphane PALIX

Corporate communication is overseen by Cap Médiations:

  • Serge Briez, Communications Director and Filmmaker
  • Agnès Briez Huchon Multimedia Engineer and Webmaster.

Market research was conducted by EM Lyon

Finite-element structural modeling was performed by Centrale Lyon


After having worked for more than 20 years in high-level positions for Lyon-based giant Merial, Bruno Rabu experienced health problems that forced him to make changes in his professional life as well as his leisure activities and passions.

“I loved practicing sports, and there were many things I just couldn’t do anymore. I told myself I had to find a solution that would allow me to keep sailing. I looked at what was out there, and I couldn’t find anything I was happy with. That was the starting point,” he explains.