Elliot wrote:Thor, that's a fabulous idea. And the "scissor" mechanism to release it. You have it all designed!
I can add only one suggestion: The brake lever can perhaps be modified so it has a "catch" to keep it pulled in, so the hand muscles do not cramp up while riding.
So who's building it?
Incidentally, big trucks and buses with pneumatic brake systems have such spring-loaded parking brakes to keep the vehicle secure even if all the compressed air leaks out while the vehicle is parked. Likewise, if a major leak occurs while driving, the spring brakes come on by themselves.
For a lever with a catch, I am remembering a trike one of my grandmother's had, the brake lever had a spring loaded pin in the housing that would hold the brake until you squeezed the lever. Then the pin would pop back up and the lever could be fully released.
And the spring brake idea was inspired by truck parking brakes. Shoot it could even become a safety device for a bicycle with a motor adapted of some kind. Kind of a deadman, if you fall off the seat the brake comes on.
I'd love to get into making this stuff, I just don't have the facility or spare bits to cannibalize.