Method for making a flexible bearing

Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...

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156245, 264157, 264250, 264258, 264261, 277227, 308 2R, 308 26, B29C 2700, B29G 500

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active

042632439

ABSTRACT:
A strong, light-weight flexible bearing, particularly suitable for use in mounting a movable thrust nozzle to a rocket case, is made by stacking reinforced plastic shims, having the forms of concentric, spherical zones, alternately with layers of elastomer and bonding them together. A protective heat and flame barrier is formed by providing an especially refractory outer edge on each shim, which extends beyond the layers of elastomer. Each shim is made by:
preparing a mold surface that forms a spherical zone of unique radius; filling a refractory cloth with a curable, liquid resin; placing segments of the cloth on the mold surface in an overlapping arrangement until the desired shim thickness is attained; preparing a second mold surface substantially parallel to the first: clamping this over the cloth segments on the first mold surface; and applying heat and pressure to the cloth segments until the resins are cured. The protective edge is formed on each shim by attaching an edging of resin-filled cloth, of especially refractory properties, to the outer edge of at least some of the segments before arranging them in the mold.

REFERENCES:
patent: 2900182 (1959-08-01), Hinks
patent: 3429622 (1969-02-01), Lee et al.
patent: 3467353 (1969-09-01), Peterson et al.
patent: 3504902 (1970-04-01), Irwin
patent: 3504903 (1970-04-01), Irwin
patent: 3504904 (1970-04-01), Irwin
patent: 3519260 (1970-07-01), Irwin
patent: 3696999 (1972-10-01), Desjardins

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