Back to results
US 4,063,838 AGranted
Rod construction and method of forming the same
AssigneeFiber Glass Systems, Inc.
InventorVesta F. Michael
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFiber Glass Systems, Inc.
InventorVesta F. Michael
Estimating the term…
A rod construction has an inner core of high tensile strength such as a rod or bar of high tensile steel. The reinforcement core has a plurality of surface indentations, preferably uniformly arranged at spaced intervals along the length of the core periphery. Layers of tensioned longitudinal and spiral filaments embedded in a resin matrix are formed about the core periphery so as to provide a rod of excellent strength and corrosion resistance. In a further embodiment, the rod may have male threads disposed at opposed ends for engagement with femal threads of a coupling. In yet another embodiment, the rod is integrally formed at opposed ends with male and female threads. The female threads are formed adjacent the inner periphery of a band reinforcement concentrically embedded in one rod end. In those rod applications in which the weight and strength of a steel core are not desired or necessary, a rod construction is provided consisting of alternate layers of glass filaments arranged parallel and transversely to the rod longitudinal axis embedded in a matrix of cured resin with no metal core.
A solid reinforced rod construction substantially completely devoid of internal fissures and gaps and of high tensile strength comprising a plurality of longitudinal glass filament reinforcements under tension and a plurality of glass filament reinforcements arranged substantially transversely to said rod longitudinal glass filaments embedded in a matrix of cured resin;
A solid reinforced rod construction substantially completely devoid of internal fissures and gaps and of high tensile strength comprising a discrete core of high tensile strength having a plurality of surface indentations, an integral shell encapsulating said core comprising a plurality of longitudinal glass filaments under tension arranged substantially uniformly about said core, parallel to the longitudinal axis of said core;
A solid reinforced rod construction substantially completely devoid of internal fissures and gaps and of high tensile strength comprising a plurality of longitudinal glass filaments under tension and a plurality of glass filaments arranged substantially transversely to said rod longitudinal glass filaments;
Dependencies are inferred from the claim text.