US 11,053,104 B2
Boom for a pipelaying machine
James Michael Dunn, Edwards, IL (US); Curtis J Caldwell, Metamora, IL (US); Sean D. Lawson, East Peoria, IL (US); and Dana John Willer, Galva, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Deerfield, IL (US)
Filed on Jun. 6, 2019, as Appl. No. 16/433,011.
Prior Publication US 2020/0385246 A1, Dec. 10, 2020
Int. Cl. B66C 23/64 (2006.01); B66C 23/44 (2006.01)
CPC B66C 23/64 (2013.01) [B66C 23/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A boom for a pipelaying machine, the boom having a base end adapted to be pivotally coupled to the pipelaying machine and a distal end opposite the base end, and the boom comprising:
a pair of posts located in a first plane and disposed in a tapered configuration with respect to a second plane transverse to the first plane; and
a cross-brace disposed between the pair of posts and located partway along a length of the pair of posts, the cross-brace comprising:
a first link member and a second link member disposed along the first plane, wherein each of the first link member and the second link member are angularly offset from each other and the second plane respectively, and wherein ends of each of the first and second link members are rigidly attached to the pair of posts; and
a first rib member and a second rib member disposed along the second plane and rigidly attached to the first link member and the second link member respective,
wherein both of the ends of the first and second link members are closer to the base end of the boom than the distal end of the boom and a maximum height of the cross-brace in a length direction of the boom is less than a maximum width of the cross-brace in a width direction of the boom perpendicular to the length direction, such that a first window between the cross-brace and the distal end of the boom is greater in area than a second window between the cross-brace and the base end of the boom.