Frame Runner

This device it used by individuals with limited balance, by sitting on the seat the user can propel the device with a running motion. The three wheels and wide stance keep the device balanced allowing the user to reach great speeds.

Small children's bike

1" square tubing

3/4" square tubing

wheels

Axle bolts

Cut along the red lines to separate the front forks of the bike as well as the seat post receiver. Try and find a bike that has breaks on the handle bars for the front wheel. These will be the breaks for the frame runner. After separating the parts clean up and remove excess metal in preparation for welding.

Cut the 3/4" square tubing to the required lengths. When drilling the holes for the rear axel it is easiest to cut the square tubing longer than necessary, drill the holes at the desired length, then cut the remaining square tubing in the middle of the hole that was drilled. In the half circle left by the hole weld the axel shaft in place.

When welding the external frame to the bike forks have the frame sitting flat on a table with the bike forks hanging of the edge. This will make it easier to have a 90 degree angle between the frame and the bike forks.

The rear wheels for the device are 15" in diameter with a half inch axel. The axel is a quick release axel form a manual wheelchair. It is 1/2" in diameter and 5 1/4" inches in total length.

The center post needs to be assembles in stages to allow the chest support to be adjustable. Weld the front and back sections separately. Before welding the front and back together slide the chest support onto the front section of the center post. The chest support should be able to slid forwards and backwards to allow for adjustability.

When welding the center post to the frame have the rear wheels on the frame. This will help ensure the horizontal section of the center post is level. The wheels are attached with quick release axel pins.

Cut two sections of tubing 3" long with 45 degree cuts on both ends and weld them into the front section of the frame runner connecting the center support to the external frame. This strengthens the frame and helps keep the frame runner from wobbling.

The seat support is made by welding the original seat support of the bike to a length of 3/4' square tubing. You can then slide the seat support into the center support. The seat support should be able to slide in and out to allow the seat distance to be adjustable. When it is in the desires location tighten the set screw and lock the seat support into place.

The chest rest is made form a head rest of a power wheelchair, and the seat is a regular bike seat. when selecting a heat rest be sure it fits in the chest support receiver and can slide up and down.

To help keep the frame runner rolling straight bungies can be added to the steering to bring it to center again.