Mobile ladder

A mobile ladder comprising a base, castors mounted to the base adapted to provide mobility thereto, a ladder connected to the base, a support member connected at one end to the base at a point spaced from the ladder connection with the base, and the other end of the support member being hingedly connected to the ladder at a point spaced from the ladder and base connection, forming a structural triangle therewith;

• the ladder including a floor engaging member fixed thereto and adapted to engage the floor, the connection of said ladder to said base including a link member pivotally mounted to the base about a first axis normal to the plane through the structural triangle, said link being pivotally connected to the ladder about a pivot having an axis parrallel to the first axis and spaced therefrom, the link being adapted to pivot about the first axis such that said ladder pivot follows an arc between a first position whereby the floor engagement member of the ladder is in frictional contact with the floor surface and a second position whereby the ladder pivot with the link is passed over the gravitational dead center position above the first axis, and whereby said floor engaging member of said ladder is spaced from the floor surface.