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US 4,430,906 AGranted
Composite wrist pin and process
AssigneeStandard Oil Company (Indiana)
InventorsMatthew W. Holtzberg, Lawrence D. Spaulding
Life of this patent
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Abstract
A lightweight composite wrist pin is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.
Claims38
A composite engine part, comprising:
- a piston;
- a connecting rod;
- a metal sleeve for pivotally receiving and operatively connecting said piston and said connecting rod;
- an amide-imide resinous polymeric core for positioning within said sleeve;
- said metal sleeve and polymeric core cooperating with each other to form a wrist pin;
- said piston, connecting rod, core, and said sleeve maintaining their structural relationship, shape and integrity at engine operating conditions.
3 more elements
A process for forming and connecting a composite wrist pin, comprising the steps of:
- molding an amide-imide resinous polymer to form a core;
- allowing said amide-imide resinous polymeric core to cool below its plastic deformation temperature;
- post curing said core by solid state polymerization;
- press fitting said cured core into a metal sleeve;
- and
- pivotally connecting a piston to a connecting rod by pivotally fitting said sleeve in the wrist pin holes of said piston and said connecting rod.
3 more elements
Dependencies are inferred from the claim text.