US Patent 7101081 Positioning device for a ball bearing slide

A positioning device for a ball bearing slide includes a positioning member and a releasing member and is incorporated with a mobile track and a fixed track. The positioning member is pivoted to the mobile track. The releasing member is inserted into the mobile track. The positioning member includes a resilient lever having a taper block to hold against the fixed track to restrict the mobile track in both directions. The positioning member further includes a protruding post. The releasing member is provided with a hollowed trough to link to the positioning member to release the bi-way restriction.