Prentis v. Yale Mfg. Co.
F: Prentis, a foreman in an automobile dealership's parts department, utilized a battery-powered forklift to lift an engine into a truck's cargo bed. The Yale Manufacturing forklift was a stand-up variety, rather than a riding machine with a seat, and it was operated by lifting its handle up and down. When the machine experienced a power surge, Prentis lost his footing and fell.
Px: P sued for an alleged design defect that Yale should have made a seat or platform for the forklift operator. Trial judge refused to insturct jury on breach of warranty. Court of Appeals reversed for wrong jury instruction.
H: A negligence test should apply to products liability actions predicated upon defective design.