Two experiments were performed on push and turn lids. In Experiment 1, the reference design was circular. “Radiator cap” lids were built with 5, 7 and 9 mm levers with 2, 3 or 4 levers/lid. Lids were 54 and 76 mm dia. The 19 student subjects exerted 29% more torque on the 76 mm dia lid. Either 2 or 4 levers, each 7 or 9 mm long, gave most torque. In Experiment 2, dome-shaped lids were tested vs flat lids. The dome lids were not significantly better.
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References
1.
CranmerL.KonzS., 1990, Knurls on push and turn lids. Proceedings of the Human Factors Society..
2.
KonzS.RavishankerH., 1989, Knurls on push and turn lids. Proceedings of the Human Factors Society..
3.
NagashimaK.KonzS., 1986, Knurls on pop bottle lids. Proceedings of the Human Factors Society..
4.
ReplogleJ., 1983, Hand torque strength with cylindrical handles. Proceedings of the Human Factors Society..
5.
RohlesF.MoldrupK.LavianaJ., 1983, Opening jars: an anthropometric study of the wrist twisting strength of the elderly. Proceedings of the Human Factors Society..
