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Pallet sensor for lift truck

  • US 4,747,610 A
  • Filed: 08/20/1987
  • Issued: 05/31/1988
  • Est. Priority Date: 08/20/1987
  • Status: Expired due to Fees
First Claim
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1. A system for staging a fork lift with a pallet, wherein the fork lift has load wheels carried by forks and a lift system for extending the wheels away from and retracting the wheels toward bottoms of the forks to raise and lower the forks, the pallet has top and bottom decks defining passages therebetween and the bottom deck has at least one opening therethrough in communication with the passages, and the forks and load wheels are extendible into the pallet passages to lift the pallet upon extension of the wheels away from the bottoms of the forks, said system comprising sensor means carried on at least one of the forks for detecting the positions of the load wheels with respect to the at least one pallet bottom deck opening when the forks are extended into the pallet passages;

  • and means responsive to said sensor means for generating a signal when the wheels are positioned to be extended away from the forks and through the at least one bottom deck opening to raise the forks and lift the pallet without contacting any portion of the bottom deck.

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