Retractable pivot bolt arrangement

Claim 1

In a locking bolt arrangement for securing a container, having socket-type openings in its bottom wall, to a support surface, and of the type including a locking bolt having a hammerhead and a shank, a hammerhead collar on the support surface beneath the bolt head and rotatably mounting the bolt, and a pivot lever secured to the shank beneath the collar and extending radially from the shank, the improvement comprising, in combination, a housing secured to the support surface and having a top wall, a rear wall and sidewalls, defining an upwardly and downwardly opening recess, and a cylindrical wall extending downwardly from said top wall in said recess; said top wall having a noncircular aperture and said collar having a noncircular lower portion conformingly engageable in said aperture; said cylindrical wall having a substantially horizontal slot, through which said pivot lever extends, and a substantially vertical slot extending downwardly from one end of said substantially horizontal spot; said collar, when said pivot lever is engaged in said substantially horizontal slot, projecting above said top wall and said bolt head, and when said pivot lever is engaged in said substantially vertical slot, being retracted below the upper surface of said top wall; said bolt head and said collar being aligned with each other when said pivot lever is at an unlocking position intermediate the ends of said substantially horizontal slot, and said bolt head projecting laterally beyond said collar when said pivot lever is adjacent either end of said substantially horizontal slot; and locking protrusions extending outwardly from said cylindrical wall adjacent both ends of said substantially horizontal slot and engaged with said pivot lever to retain said bolt head in a container locking position when said pivot lever is at either end of said substantially horizontal slot.