Patent ID: 8262310

Claim:
An attachment coupler comprising: a frame including: (i) an upper portion adapted for connection to an excavator arm and control link; and, (ii) a lower portion including a front hook and rear hook respectively adapted for engaging first and second associated attachment pins of an associated attachment; a lock plate movable between an unlocked position and a locked position, wherein said lock plate obstructs said rear hook to capture the second associated attachment pin in the rear hook when in said locked position and wherein said lock plate is withdrawn relative to said rear hook to allow movement of the second associated attachment pin into and out of the rear hook when in said unlocked position; an actuator operably connected to the lock plate for moving the lock plate to and between its unlocked position and its locked position; a first lock bar connected to the frame and movable between an engaged position and a disengaged position, wherein said first lock bar blocks movement of said lock plate from its locked position to its unlocked position when said first lock bar is in its engaged position; a secondary lock associated with said front hook, said secondary lock comprising a latch that moves between an extended position and a retracted position, said latch including a latch bar and at least a first latch projection connected to the latch bar, wherein said first latch projection projects into and obstructs said front hook to capture the first associated attachment pin in said front hook when said latch is in its extended position, said first latch projection retracted relative to said front hook to allow movement of the first associated attachment pin into and out of said front hook when said latch is in said retracted position, wherein said secondary lock further comprises: (i) first and second latch bar housings connected to said frame and respectively slidably engaged with opposite first and second ends of the latch bar; and (ii) first and second latch springs located respectively in said first and second latch bar housings and acting respectively on said first and second ends of said latch bar; wherein said latch is biased to its extended position and movable from its extended position to its retracted position by contact between the latch and the first associated attachment pin when said first lock bar is in its disengaged position; and wherein said first lock bar blocks movement of said latch from its extended position to its retracted position when said first lock bar is in its engaged position.