Lawsuit Alleges SharkNinja Blender Blades Detached, Cut Woman

Increasing number of SharkNinja blender lawsuits allege the company’s removable blade assembly can unexpectedly detach during use, leaving consumers with severe injuries.

A California woman has filed a product liability lawsuit alleging SharkNinja continues to sell blenders with a dangerous blade design, despite years of reports involving severe lacerations and other injuries linked to the product’s blade system.

The complaint (PDF) was brought by Barbara Petersen in the U.S. District Court for the Eastern District of California on June 17, naming SharkNinja Operating LLC as the defendant.

Petersen alleges she suffered deep lacerations while using a Ninja CO750B Series blender to prepare food. She claims the injuries were caused by a defect that allows the stacked blade assembly to separate from the blender base.

Kitchen Appliance Injury Lawsuits

Ninja blenders have become one of the most widely used countertop kitchen appliances, promoted for their high-powered motors and stacked blade systems that quickly process food and beverages. Unlike many traditional blenders, certain Ninja models use a removable blade assembly that lifts out of the pitcher rather than remaining permanently attached.

However, an increasing number of SharkNinja blender lawsuits allege that defects in the products can cause the blade assembly to detach unexpectedly or allow the blender to rupture during normal use, resulting in severe lacerations, burns and other injuries.

The lawsuits are part of a broader wave of litigation involving allegedly defective kitchen appliances that use high-speed motors, sealed containers or pressurized cooking systems. In May 2025, SharkNinja recalled nearly 2 million Ninja Foodi pressure cookers after reports that the lid could be opened while the contents remained under pressure, resulting in more than 100 burn injuries.

These kinds of injuries have fueled numerous pressure cooker explosion lawsuits against manufacturers of Ninja Foodi, Instant Pot, Crock-Pot and other pressure cooker brands. Many of the claims allege that defective lid locking systems allowed hot food and liquids to erupt from the appliances, causing catastrophic burn injuries.

SharkNinja Blade Design Defect Allegations

According to the lawsuit, Petersen was using the blender on July 1, 2024, for its intended purpose of blending food when the unsecured blade assembly detached from the drive shaft, resulting in severe cuts. She alleges the incident left her with painful injuries, medical expenses, physical pain, emotional distress and other damages.

The complaint indicates Ninja blenders use a stacked blade assembly that simply rests on the drive shaft rather than locking into place. While the pitcher and lid secure firmly during operation, the lawsuit claims the blade assembly remains loose and can fall out when consumers remove the lid and pour the contents.

According to the lawsuit, safer alternative designs were readily available, including locking or permanently securing the blade assembly to the drive shaft. Petersen alleges SharkNinja continued selling blenders with the unsecured design despite knowing it posed an unreasonable risk of serious laceration injuries.

The lawsuit claims SharkNinja failed to redesign the product, adequately test the blender or warn consumers about the alleged danger, asserting the company placed profits ahead of consumer safety.

“As a direct and proximate result of Defendant’s intentional concealment of such defects, its failure to remove a product with such defects from the stream of commerce, and its negligent design of such products, Plaintiff used an unreasonably dangerous blender, which resulted in significant and painful bodily injuries.”

— Barbara Petersen v. SharkNinja Operating LLC

As evidence that the company knew about the alleged hazard, the complaint points to a November 2015 Consumer Product Safety Commission recall involving about 1.1 million Ninja BL660 series blenders.

The recall was issued after the CPSC received 53 reports of consumers suffering lacerations when the loose stacked blade assembly fell from the pitcher during pouring. However, Petersen contends SharkNinja continued designing and selling other blender models that rely on the same unsecured blade assembly, including the CO750B Series involved in her case.

Petersen’s lawsuit raises allegations of strict products liability, negligent products liability and breach of implied warranty of merchantability. She is seeking general, special and punitive damages for her injuries and suffering.

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