Patent ID: 9326440
Filing Date: 2016-05-03
CPC Classification: A01B,A01C

Claim Text:
1. A linkage connecting a tillage implement to a tool bar comprising: a. a shank member having said tillage implement connected to its lower end; b. a main arm connected between said shank member and a bracket secured to said toolbar; c. front and rear break links pivotally connected to each other with said front break link pivotally connected to said bracket and said rear link pivotally connected to said shank member; and, d. an energy storage member connected between said main arm and the pivotal connection between said front and rear break links; wherein the geometric configuration of each of said arms, links and weldment are such that excessive draft force applied to said tillage implement creates rotation at the pivotal connection between said front and rear break links prior to rotation between said main arm and said shank member such that said tillage implement is constrained to float upwardly and forwardly, wherein said linkage maintains the angular relationship of said shank member as said linkage urges said tillage device to move upwardly and forwardly as said tillage device encounters a substantially vertical load during normal operation.