06119963 is referenced by 25 patents and cites 30 patents.

A boom assembly includes a central support, a first wing pivotably coupled to the central support so as to rotate about a first axis, a first cylinder-piston assembly having a first end pivotably coupled to the support, a second end pivotably coupled to the first wing at a first pivot point for rotation about a second axis on a first side of the first axis, and a second cylinder-piston assembly having a first end pivotably coupled to the support and a second end pivotably coupled to the first wing at a second pivot point for rotation about a third axis on a second side of the first axis. Extension and retraction of the first and second cylinder-piston assembly applies varying opposing torque to the first wing depending upon an angular orientation of the first wing about the first axis. In one exemplary embodiment, the first piston-cylinder assembly includes a cylinder coupled to one of the support in the first wing having a first chamber proximate the first wing and a second chamber distant the first wing, a piston disposed in the cylinder separating the first and second chambers and a rod coupled to the piston and the other of the support in the first wing. The boom assembly additionally includes a source of fluid and a fluid line in communication between the first chamber and the source of fluid. The fluid line is configured to restrict fluid flow to a maximum first rate from the first chamber to the fluid source as a volume of the first chamber is reduced. The boom assembly preferably includes a one-way valve in the fluid line preventing fluid flow from the source of fluid to the first chamber at a second maximum rate greater than the first maximum rate. In another exemplary embodiment, the boom assembly is provided as part of sprayer, wherein the first wing carries a plurality of spray nozzles fluidly connected to a fluid reservoir.

Title
Full boom pivot breakaway
Application Number
9/365090
Publication Number
6119963
Application Date
July 30, 1999
Publication Date
September 19, 2000
Inventor
Luke D Prouty
Benson
MN, US
Bruce G Bastin
Starbuck
MN, US
Agent
Foley & Lardner
Assignee
Case Corporation
WI, US
IPC
B05B 1/20
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