US Patent 7753188 Pallet locks

A pallet lock comprising: (a) a housing including two opposing rails defining a channel therebetween; and (b) a biased double lock at least partially seated within the channel, the double lock repositionable between a pick side blocking position and a load side blocking position, the double lock including a load side portion and an opposing pick side portion, where the pick side portion includes a pick side lock, where the load side portion includes a load side lock, and where at least one of the pick side lock and the load side lock are recessed within the channel as a result of the bias of the double lock.