It is axiomatic that a plaintiff must offer evidentiary support for each element of her claim in order to survive summary judgment. And a ubiquitous feature of product liability actions is the use of expert witnesses by both sides. These principles are, of course, related – the plaintiff usually must offer expert testimony in order to make a prima facie case, and the defense then attacks that prima facie case through expert testimony. But sometimes a plaintiff loses sight of the connection and, despite retaining an expert, fails to elicit the opinions she needs to make her case. As a recent decision from the Western District of Wisconsin illustrates, it pays for a defendant to carefully evaluate whether a plaintiff has checked all of the necessary boxes.
In Moore v. National Presto Industries, Inc., 2022 WL 1555875 (W.D. Wis. May 17, 2022), Plaintiff alleged that she was injured when she opened her pressure cooker while it was still pressurized, ejecting its contents onto her arm, causing burns. Plaintiff sued the cooker’s manufacturer, asserting strict liability claims for design defect and failure to warn as well as a claim for negligence. Defendant moved for summary judgment on each of these claims.