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    The Idea     6 prototypes     Development     Production
The idea
Marc Grue, inventor of the Double Trolley, explains how the project started:

"Jazz bassist Jesper Carlsen had converted a laundry basket trolley into a transportation device for his double bass (see left). I borrowed it from him and rolled my bass with it to and from orchestra rehearsals and concerts.

At that time I was looking for a high, adjustable stool to sit on, but I couldn't really find one high enough. One day I was looking at the laundry trolley and thought: It should be possible to put a seat on the top!"
Marc Grue with his double bass on the laundry trolley in 1992.
Marc Grue continues:

"I dropped another rebuild of the laundry trolley and went on with the possibilities of making a collapsible combined stool and trolley.

After a while I imagined the horrifying scenario of how the two legs (or rather wheels!) could roll out from under me during a concert!!

I therefore explored the idea of taking off the wheels instead. This was the birth of the Double Trolley and I started to work on the first prototype."


See how the prototypes of the Double Trolley were modified and improved over a period of 5 years!
One of many sketches for a collapsible combined trolley/stool (the seat is touching the shoulder of the bass).

 

I travelled around and visited musician friends and brought my bass along. In total I travelled almost 3000 kilometers with train and bus, something that wouldn't have been possible without my Double Trolley!

Daniel Duzlewski
Örebro, Sweden
 

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