Patent ID: 7073972

Claim:
A locking pin system adapted for connecting a conversion plate adaptor with a universal quick attach tool plate to loader arms of a powered vehicle, the locking pin system comprising: a linear locking pin member moveably mounted within a vertical channel interior the conversion plate adaptor to engage said universal quick attach tool plate, the pin member moveable between a retracted position exterior an aperture in said universal quick attach tool plate and an extended position interior an aperture in the tool plate, the pin member having a planar plate portion secured at an upper end thereof exterior the vertical channel, the plate portion oriented parallel with the pin member's longitudinal axis, the plate portion having a threaded bolt member mounted perpendicular thereto; a planar, slotted upright member secured at one end to the conversion plate adaptor adjacent the locking pin member and parallel with the pin member's longitudinal axis, the upright member having a vertical slot therein accepting the pin plate portion's threaded bolt member therethrough, the pin member's plate portion including a serrated surface contacting the slotted upright member and the slotted upright member including a serrated surface contacting the serrated surface of the pin member's plate portion; and a locking handle member including a threaded fitting portion at one end thereof, the threaded fitting portion engaging the pin plate portion's threaded bolt member extending through the upright member's slot, whereby pivoting the threaded fitting with the handle member draws the pin member's plate portion into contact with the upright member, thereby locking the pin member at a selected position in the vertical channel.