Back to results
US 9,936,646 B2Granted
Light weight needle construction for delivering twine in a large square baler
AssigneeDeere & Company
InventorsCarl F. Demulder, Gregory S. McCunn
Life of this patent
Estimating the term…
Abstract
A twine delivery needle is constructed so as to include metal tip and mounting base sections or regions joined together by a relatively light weight central section having a composite structural sandwich construction comprising a low-density rigid foam core encased within a thin, high strength, skin or covering comprised of plies of woven and substantially continuous fibers disposed within a hardened matrix resin material.
Claims19
A baler twine-delivery needle comprising:
- an elongate, curved needle body including a metal tip section including a tip region carrying at least one twine guide roller, a metal mounting base section and a composite middle section extending between and being joined to each of said tip section and base section;
- said composite middle section including a foam board core wrapped in at least one ply of fibers disposed in a hardened matrix of a resin based material so as to define a skin about the foam board core.
Dependencies are inferred from the claim text.