US 12427372

Here is a concise summary of US patent 12427372:

US Patent: 12427372

• Title: Leg training device
• Assignee: Ningbohuayuedianzishangwuyouxiangongsi [cite: Original Assignee: Individual; Assigned to NINGBOHUAYUEDIANZISHANGWUYOUXIANGONGSI, 2025-11-21]
• Inventors: Zhong YIN [cite: Inventor: Zhong YIN]
• Filing Date: 2024-11-21 [cite: Filing date: 2024-11-21]
• Issue Date: 2025-09-30 [cite: Publication date: 2025-09-30, Application granted: 2025-09-30]
• Abstract: A leg training device comprises a support frame and a seat installed on the support frame, wherein a leg exercise component and a counterweight bearer are further provided on the support frame, and a load transfer component for transferring a load is provided between the leg exercise component and the counterweight bearer; the load transfer component comprises a connecting element and a guiding element; at least two ends of the connecting element are respectively attached to the leg exercise component and the counterweight bearer. [cite: Abstract]

Plain-Language Overview of Independent Claims:

The patent features a leg training device designed to provide a constant resistance throughout the exercise, addressing the issue of uneven weight distribution in traditional kicking machines.

• Independent Claim 1: This claim describes a leg training device with a support frame and a seat. The support frame holds a leg exercise component and a rotatable counterweight bearer. A load transfer component (comprising a connecting element and a guiding element) is situated between the leg exercise component and the counterweight bearer. This component is designed to continuously transfer the counterweight bearer's weight to the leg exercise component and simultaneously pull the counterweight bearer to "turn over." The leg exercise component specifically includes a roller pad (on a rod), a link mechanism, and an adjusting mechanism, both rotatably mounted on the support frame. The link mechanism consists of a first rod connected to the roller pad rod and pivotally connected to a second rod. The adjusting mechanism includes an adjusting disk and a rotating shaft, with a bolt connecting the second rod of the link mechanism to the adjusting disk. [cite: Claim 1]

• Independent Claim 10: This claim also describes a leg training device with a support frame and a seat. It similarly includes a leg exercise component and a rotatable counterweight bearer, with a load transfer component between them. In this claim, the load transfer component is specifically defined as a rope and a guide wheel. The guide wheel is on the support frame, and the rope passes through its groove, dividing into two parts. These two parts are attached to the leg exercise component and the counterweight bearer, respectively. A key feature is that these two rope parts create a 1:1 transmission, and the rope is configured to pull the counterweight bearer to "turn over" by lifting it away from a fixed seat on the support frame, on which it rests when not under load. [cite: Claim 10]

USPTO Database and CAFC 2026 Dockets:

Based on the provided information, US Patent 12427372 is Active [cite: Legal status: Active].

Regarding litigation, the patent family has litigation filed. A US case (case number 1:26-cv-04386) was filed in the Illinois Northern District Court [cite: US case filed in Illinois Northern District Court litigation, https://portal.unifiedpatents.com/litigation/Illinois%20Northern%20District%20Court/case/1%3A26-cv-04386]. This is a district court case, not a CAFC (Court of Appeals for the Federal Circuit) case.

As of April 26, 2026, a direct search for "US12427372" or "1:26-cv-04386" within the publicly available CAFC 2026 scheduled dockets (May, June, July 2026) did not yield any direct matches, indicating that this specific district court case has not yet reached the Federal Circuit for appeal and is not currently on their argument calendar for these months. Therefore, there is no authoritative information to suggest that US patent 12427372 is currently involved in CAFC dockets for 2026.