Patent ID: 7431221
Filing Date: 2008-10-07
Classification: A01B,A01M

Abstract:
1. A lock assembly to secure a folding boom assembly, the folding boom assembly having a boom including an outer section that pivots about a first vertical axis with respect to a middle section, the middle section pivots about a second vertical axis with respect to an inner section, and the inner section pivots about a third vertical axis with respect to a boom support structure of the boom assembly, comprising: a first interlock portion configured to be received by a second interlock portion when the outer section pivots laterally inward about the first vertical axis with respect to the middle section to a first stage folded position, wherein as the outer and middle sections move from the first stage folded position laterally inward about the second vertical axis with respect to the inner section, the second interlock portion slidably moves and interlocks with the first interlock portion to restrain the outer section with respect to the middle section.