Today’s invention is a way to make office chairs roll more smoothly across office flooring.
Conventional casters (with wheel centre trailing the vertical axis) always seem to end up pointing in the wrong direction. This causes carpet rucking and a massive amount of extra, irritating friction.
The new approach has the chair mounted on a shallow, conical base with casters, as shown.
To move in a certain direction, first rock in the opposite direction slightly, allowing the casters on the other half to rotate around under gravity to align themselves with the planned movement.
Rolling onto these then allows the chair to be supported and move unhindered on aligned wheels.