Patent ID: 7650738

Claim:
A crop accessory adapted for attachment to a cutting header having a knife mounted along a lower front edge thereof and guards attached to the lower front edge with guard bolts, the crop accessory comprising: a header latch member adapted for attachment at a lower end thereof to a guard bolt on a top side of the header, the header latch member comprising a sloped rear wall sloping downward and rearward from an upper end thereof; an accessory latch member at a rear end of the accessory and adapted to move rearward into engagement with the header latch member such that the rear end of the accessory is maintained in substantially fixed vertical and lateral relationship to the header; a guard finger aperture defined on the accessory forward of the accessory latch member and oriented such that a forward extending guard finger of a guard enters the guard finger aperture when the accessory latch member is moved rearward into engagement with the header latch member; a spring element attached to the accessory and defining an aperture through the spring element above the accessory latch member; wherein the spring element is biased downward toward the accessory latch member; wherein the spring element is configured such that the spring element is pushed upward by contact with the header latch member as the accessory latch member is moved rearward into engagement with the header latch member, and moves downward when the latch members are fully engaged and the upper end of the header latch member moves into the aperture so that a rear edge of the aperture engages the sloped rear wall, and wherein the spring element exerts a downward force such that during vibration between the spring element and the header latch member the edge of the aperture in the spring element moves rearward down the sloped rear wall thereby tightening the accessory latch member to the header latch member.