Patent 12427372

Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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Most Relevant Prior Art for US Patent 12427372

US Patent 12427372 cites a number of prior art references. The most relevant references would be those that disclose features closely related to the core inventive concept of providing constant resistance in a leg training device through a load transfer component. Here's an analysis of the cited patents:

1. US5980434A - Exercise apparatus with adjustable roller pads

  • Full Citation: US5980434A
  • Publication/Filing Date: The patent US5980434A was granted on November 5, 1999 (Publication date). The filing date is not directly available from the provided patent text, but it is explicitly referenced in US12427372 as an "existing U.S. Pat. No. 5,980,434" in the background section.
  • Brief Description: This patent describes an "Exercise apparatus with adjustable roller pads." The background of US12427372 specifically critiques this type of traditional kicking machine design, noting that its swing arm's arc-shaped motion leads to uneven weight distribution throughout the exercise. [cite: Description] In the initial stage of swinging, the weight borne by the leg is light due to small gravity, which increases as the swing angle increases and the gravity effect is enhanced. [cite: Description]
  • Potential Anticipated Claims (35 U.S.C. § 102): While US5980434A is identified as prior art that US12427372 aims to improve upon, it doesn't appear to anticipate any claims of US12427372 under 35 U.S.C. § 102, as the core innovation of US12427372 is to solve the problem of uneven weight distribution present in devices like US5980434A. Therefore, it would not anticipate claims that explicitly address the "constantly transfer a weight" or "1:1 transmission" features.

2. US2855199A - Exercise device

  • Full Citation: US2855199A
  • Publication Date: 1958-10-07 [cite: US2855199A]
  • Brief Description: An exercise device. Specific details about its mechanism from the provided text are limited.
  • Potential Anticipated Claims (35 U.S.C. § 102): Without more detailed information on the mechanism of US2855199A, it is difficult to definitively assess which claims of US12427372 it might anticipate. However, as an early "exercise device," it could broadly anticipate elements like a "support frame" and a "leg exercise component" if it has a similar function.

3. US4979736A - Hydraulic gymnasium equipment

  • Full Citation: US4979736A
  • Publication Date: 1990-12-25 [cite: US4979736A]
  • Brief Description: This patent relates to hydraulic gymnasium equipment.
  • Potential Anticipated Claims (35 U.S.C. § 102): Given its focus on hydraulic resistance, it is unlikely to directly anticipate the load transfer component of US12427372, which uses a connecting element and guiding element (like a rope and guide wheel) to transfer weight, specifically with a 1:1 transmission. It may broadly anticipate concepts of a "leg exercise component" and a "support frame."

4. US5088726A - Variable resistance exercise apparatus

  • Full Citation: US5088726A
  • Publication Date: 1992-02-18 [cite: US5088726A]
  • Brief Description: A variable resistance exercise apparatus.
  • Potential Anticipated Claims (35 U.S.C. § 102): While this patent mentions "variable resistance," US12427372 specifically aims for constant resistance. Therefore, it would likely not anticipate the claims related to the constant transfer of weight. However, it might share common elements with the general concept of an "exercise apparatus" with a "leg exercise component" and a "counterweight bearer."

5. US5356360A - Adjustable lever arm-variable resistance cam assembly

  • Full Citation: US5356360A
  • Publication Date: 1994-10-18 [cite: US5356360A]
  • Brief Description: Describes an adjustable lever arm-variable resistance cam assembly.
  • Potential Anticipated Claims (35 U.S.C. § 102): Similar to US5088726A, the focus on "variable resistance" makes it less likely to anticipate the constant resistance aspect of US12427372. The "lever arm" and "cam assembly" might share some structural similarities with the "link mechanism" or "adjusting mechanism" of Claim 1, but the overall function of providing constant resistance through a distinct load transfer component would likely be different.

6. US20010053734A1 - Training device designed to improve the physical readiness level of the low back and pelvic girdle

  • Full Citation: US20010053734A1
  • Publication Date: 2001-12-20 [cite: US20010053734A1]
  • Brief Description: A training device designed for the low back and pelvic girdle.
  • Potential Anticipated Claims (35 U.S.C. § 102): This patent focuses on a different body part (low back and pelvic girdle), making it less likely to directly anticipate the specific "leg exercise component" described in US12427372. However, general features like a "support frame" or "seat" could be present.

7. US6558303B1 - Combination leg exercise machine with adjustable seat assembly

  • Full Citation: US6558303B1
  • Publication Date: 2003-05-06 [cite: US6558303B1]
  • Brief Description: A combination leg exercise machine with an adjustable seat assembly.
  • Potential Anticipated Claims (35 U.S.C. § 102): This reference is highly relevant as it is a "leg exercise machine" and includes an "adjustable seat assembly." It could potentially anticipate the general elements of Claim 1 and Claim 10 relating to a "support frame," "seat mounted on the support frame," and a "leg exercise component." Further analysis of its resistance mechanism would be needed to determine if it anticipates the load transfer component with constant weight transfer.

8. US6676574B1 - Shift position selector for a pad on an exercise machine

  • Full Citation: US6676574B1
  • Publication Date: 2004-01-13 [cite: US6676574B1]
  • Brief Description: A shift position selector for a pad on an exercise machine.
  • Potential Anticipated Claims (35 U.S.C. § 102): This patent's focus on a "shift position selector for a pad" could be relevant to the "adjusting mechanism" (23) and "adjusting disc" (231) with "adjusting holes" (2311) described in Claim 1 and Claim 7 of US12427372, which allow for changing the starting angle of the roller pad.

9. US20040254051A1 - Arm and leg exercise machine

  • Full Citation: US20040254051A1
  • Publication Date: 2004-12-16 [cite: US20040254051A1]
  • Brief Description: An arm and leg exercise machine.
  • Potential Anticipated Claims (35 U.S.C. § 102): As an "arm and leg exercise machine," it could broadly anticipate the "leg exercise component" and "support frame" of US12427372. Detailed examination of its resistance mechanism would be necessary to assess anticipation of the constant load transfer.

10. US7029426B1 - Exercise machine for conditioning athletes

  • Full Citation: US7029426B1
  • Publication Date: 2006-04-18 [cite: US7029426B1]
  • Brief Description: An exercise machine for conditioning athletes.
  • Potential Anticipated Claims (35 U.S.C. § 102): General "exercise machine" elements could be anticipated. The specific conditioning methods or resistance mechanisms would need to be reviewed to determine closer anticipation.

11. US20070275836A1 - Multifunctional trainer for strength training

  • Full Citation: US20070275836A1
  • Publication Date: 2007-11-29 [cite: US20070275836A1]
  • Brief Description: A multifunctional trainer for strength training.
  • Potential Anticipated Claims (35 U.S.C. § 102): "Multifunctional trainer" is broad, but "strength training" implies resistance. The specifics of its resistance mechanism and how it's applied to leg exercises would determine anticipation of US12427372's claims.

12. US7806815B2 - Core trainer

  • Full Citation: US7806815B2
  • Publication Date: 2010-10-05 [cite: US7806815B2]
  • Brief Description: A core trainer.
  • Potential Anticipated Claims (35 U.S.C. § 102): This patent focuses on core training, not specifically leg training, so it's less likely to anticipate the detailed "leg exercise component" of US12427372.

13. US8267843B2 - Gluteus weight training machine

  • Full Citation: US8267843B2
  • Publication Date: 2012-09-18 [cite: US8267843B2]
  • Brief Description: A gluteus weight training machine.
  • Potential Anticipated Claims (35 U.S.C. § 102): This is highly relevant as it's a "weight training machine" for a lower body muscle group. It could anticipate the general concept of a "counterweight bearer" and a "leg exercise component" (if used for leg extension/curl movements). The specific mechanism for load transfer and constant resistance would need to be compared against Claims 1 and 10 of US12427372.

14. US20170319905A1 - Dynamically adaptive weight lifting apparatus

  • Full Citation: US20170319905A1
  • Publication Date: 2017-11-09 [cite: US20170319905A1]
  • Brief Description: A dynamically adaptive weight lifting apparatus.
  • Potential Anticipated Claims (35 U.S.C. § 102): The term "dynamically adaptive weight lifting apparatus" suggests a more sophisticated resistance system. If this system achieves a constant or near-constant resistance throughout a range of motion for leg exercises, it could potentially anticipate the "constantly transfer a weight" aspect of Claims 1 and 10.

15. US10500439B1 - Exercise system

  • Full Citation: US10500439B1
  • Publication Date: 2019-12-10 [cite: US10500439B1]
  • Brief Description: An exercise system.
  • Potential Anticipated Claims (35 U.S.C. § 102): This is a general "exercise system." A detailed review would be needed to identify any features that directly anticipate the specific leg training device of US12427372.

16. USD1036577S1 - Exercise equipment

  • Full Citation: USD1036577S1
  • Publication Date: 2024-07-23 [cite: USD1036577S1]
  • Brief Description: Design patent for "Exercise equipment."
  • Potential Anticipated Claims (35 U.S.C. § 102): As a design patent, USD1036577S1 protects the ornamental design of the exercise equipment, not its functional aspects. Therefore, it would not anticipate any of the functional claims (Claims 1-11) of US12427372.

Non-Patent Literature (NPL) Citations:

The patent also cites several non-patent literature (NPL) references, mostly product listings for existing leg extension/curl machines. These are relevant for establishing the general state of the art in fitness equipment.

These NPL references describe existing leg exercise machines that use cable-operated or plate-loaded systems. They demonstrate the common designs available in the market and serve as general background art. While they may disclose general features of leg training devices (support frames, seats, roller pads, resistance), their ability to anticipate the constant load transfer mechanism with a 1:1 transmission, which is a key inventive feature of US12427372, would depend on the specific details of their internal mechanisms for resistance delivery. The patent itself highlights the "uneven distribution of weight" as a problem in "traditional kicking machine design" [cite: Description], suggesting these commercial products likely share that limitation.

Generated 5/31/2026, 6:47:07 AM