Gunnar Liljedahl

This inventor holds 26 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 2 EPO patents, primarily in Lifting Devices. Top assignees: Liko Research & Development Ab, Liko Ab, Other. Active years: 1986-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Gunnar Liljedahl. Retrieved from https://idiyas.com/inventor/gunnar-liljedahl

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 26 (Patent Applications = 1)

% Patents Active = 84.6

CIPO Patents = 1

EPO Patents = 2 (Patent Applications = 1)

Average Co-Inventor Count = 1.0

ph-index = 9

Forward Citations = 238(Granted Patents)

Location History:

S951 50 Lulea, SE (1992)
Lule.ang., SE (1986 - 1998)
Luleå, SE (2001 - 2011)
Lulea, SE (1988 - 2023)

Company Filing History:

19 out of 117

Liko Research & Development Ab

5 out of 834,513

Other

patents

where one patent can have more than one assignee

Years Active: 1986-2023

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Areas of Expertise:

Lift Control Systems

Lifting Devices

Brake Systems

Patient Lift Systems

Safety Locking Device

Hoisting Harness

Lifting Sling

Electrical Control Device

Transportation Apparatus

Walker

Hoisting Device

Adjusting Means

26 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11638669 - Lift control systems for lifting devices and lifting devices comprising the same (2023-05-02),

2. 11395780 - Lift control systems for lifting devices and lifting devices comprising the same (2022-07-26),

3. 10780004 - Lift control systems for lifting devices and lifting devices comprising the same (2020-09-22),

4. 10322046 - Lift control systems for lifting devices and lifting devices comprising the same (2019-06-18),

5. 9527699 - Lift control systems for lifting devices and lifting devices comprising the same (2016-12-27),

6. 8474794 - Lift control systems for lifting devices and lifting devices comprising the same (2013-07-02),

7. 8240437 - Brake systems for rollators and rollators comprising the same (2012-08-14),

8. 7976086 - Safety locking device for a lifting hook (2011-07-12),

9. D611393 - Stretcher (2010-03-09),

10. 7647655 - Apparatus for transportation of a disabled person in standing position (2010-01-19),

11. 7604219 - Patient lift systems with telescopic lifting apparatus (2009-10-20),

12. D567190 - Electrical control device for patient-lifting equipment (2008-04-22),

13. 7165908 - Arrangement at telescopic lifting beam (2007-01-23),

14. 6892403 - Hoisting harness (2005-05-17),

15. D486287 - Lifting sling (2004-02-04),

Title: Innovations in Lift Control Systems: The Work of Gunnar Liljedahl

Introduction

Gunnar Liljedahl, a prominent inventor based in Lulea, Sweden, has made significant contributions to the field of lift technology. With a remarkable portfolio of 26 patents, his innovations focus primarily on control systems for lifting devices, demonstrating a commitment to enhancing safety and efficiency in their operation.

Latest Patents

Liljedahl's latest patents revolve around advanced lift control systems. One key invention is a method for operating a lifting device that involves monitoring the current supplied to the lift actuator. This method incorporates a control unit that discontinues current supply when it exceeds a predefined threshold. Additionally, it determines an accumulated number of overload stops based on the current supplied. The system captures operating characteristics and times, leading to the calculation of an accumulated load-time parameter for the lifting device. This data can then be uploaded for further analysis. Another notable patent features an overhead lift equipped with a control system that includes a processor and memory, enabling it to manage operating parameters effectively and upload data to computers or networks for monitoring purposes.

Career Highlights

Gunnar Liljedahl has developed his innovative ideas through his tenure at Liko Research & Development AB, where he honed his expertise in lift technology. His inventions have not only resulted in numerous patents but have also contributed to advancements in lifting safety and efficiency.

Collaborations

Throughout his career, Liljedahl has been associated with companies like Liko Research & Development AB, allowing him to collaborate with fellow innovators and engineers in the field of lift technologies. These partnerships have enriched his work and expanded the impact of his inventions.

Conclusion

Gunnar Liljedahl's extensive portfolio and innovative approach to lift control systems highlight his significant role in enhancing the functionality and safety of lifting devices. His patents reflect a forward-thinking mindset that continues to inspire advancements in the industry. As technology evolves, Liljedahl's work remains pivotal in shaping the future of lift systems.

Profile summary based on public USPTO records.