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Safety catch for container lifting hooks

  • US 4,867,630 A
  • Filed: 05/16/1988
  • Issued: 09/19/1989
  • Est. Priority Date: 05/16/1988
  • Status: Expired due to Fees
First Claim
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1. In a system for handling containers by a truck mounted lifting mechanism including rods adapted to be elevated to engage lifting hooks comprised of hook contours formed in plates attached to either side of the container, each of said hook contours including a gap through which a rod may enter, the improvement comprising a safety catch mechanism associated with each of said lifting hooks, each of said safety catch mechanisms comprising a catch member and a pivotal mount therefor adjacent a respective lifting hook, said catch member formed with a contour shaped correspondingly to said lifting hook contour with a gap thorugh which a rod may enter, said catch member movable to align said adjacent lifting hook contour with said catch member hook contour upon moving to a raised pivotal position by elevation of a respective rod engaging said lifting hook and catch member hook contours;

  • said pivotal mount and each catch member contour located so that whenever said each catch hook pivots down, said catch member contour moves out of alignment with an adjacent lifting hook contour and substantially into the opening gap of a respective adjacent lifting hook contour;

    an actuator piece fixed to said catch member extending across said catch member hook contour to define a reduced width gap therebetween, said actuator piece positioned to be engaged by said rod as said rod descends to move said catch member down and across said gap of said lifting hook contour and thereby impede the escape of said rod therefrom, whereby reducing the incidence of inadvertent escape of said rods from said lifting hooks.

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