Patents by Inventor Gunnar Liljedahl
Gunnar Liljedahl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11638669Abstract: According to embodiments, a method for operating a lifting device monitoring with a control unit, monitoring current supplied to the lift actuator when the lift actuator is actuated; discontinuing the current supplied to the lift actuator when the current exceeds a current threshold value; determining an accumulated number of overload stops based on the current supplied to the lift actuator; determining at least one operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determining an accumulated load-time parameter for the lifting device based on the at least one operating characteristic and the operating time; and uploading, with a transceiver, at least one of the accumulated number of overload stops and the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.Type: GrantFiled: June 8, 2022Date of Patent: May 2, 2023Assignee: LIKO RESEARCH & DEVELOPMENT ABInventor: Gunnar Liljedahl
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Publication number: 20220296446Abstract: According to embodiments, a method for operating a lifting device monitoring with a control unit, monitoring current supplied to the lift actuator when the lift actuator is actuated; discontinuing the current supplied to the lift actuator when the current exceeds a current threshold value; determining an accumulated number of overload stops based on the current supplied to the lift actuator; determining at least one operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determining an accumulated load-time parameter for the lifting device based on the at least one operating characteristic and the operating time; and uploading, with a transceiver, at least one of the accumulated number of overload stops and the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.Type: ApplicationFiled: June 8, 2022Publication date: September 22, 2022Applicant: Liko Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 11395780Abstract: According to embodiments, an overhead lift includes a lift actuator; and a control system communicatively coupled to the lift actuator. The control system may include a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions and at least one transceiver communicatively coupling the control unit to at least one of a computer, a network, and a data storage device. The processor executes the computer readable and executable instructions to: determine at least one operating characteristic of the overhead lift and an operating time of the overhead lift as the overhead lift is actuated; determine an accumulated load-time parameter for the overhead lift based on the at least one operating characteristic and the operating time; and upload the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.Type: GrantFiled: August 17, 2020Date of Patent: July 26, 2022Assignee: LIKO RESEARCH & DEVELOPMENT ABInventor: Gunnar Liljedahl
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Publication number: 20200375831Abstract: According to embodiments, an overhead lift includes a lift actuator; and a control system communicatively coupled to the lift actuator. The control system may include a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions and at least one transceiver communicatively coupling the control unit to at least one of a computer, a network, and a data storage device. The processor executes the computer readable and executable instructions to: determine at least one operating characteristic of the overhead lift and an operating time of the overhead lift as the overhead lift is actuated; determine an accumulated load-time parameter for the overhead lift based on the at least one operating characteristic and the operating time; and upload the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.Type: ApplicationFiled: August 17, 2020Publication date: December 3, 2020Applicant: Liko Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 10780004Abstract: Overhead lifts with control systems are disclosed. The overhead lifts may include a lift actuator communicatively coupled to a control system. The control system may include a control unit comprising a processor and a memory having computer readable and executable instructions and at least one port for communicatively coupling the control unit to at least one of a computer, a network, and a data storage device. The processor executes the computer readable and executable instructions to: determine at least one operating characteristic of the overhead lift and an operating time of the overhead lift as the overhead lift is actuated; determine an accumulated load-time parameter for the overhead lift based on the at least one operating characteristic and the operating time; and provide an indication that a component of the overhead lift requires service based on the comparison of the accumulated load-time parameter to a service constant.Type: GrantFiled: April 26, 2019Date of Patent: September 22, 2020Assignee: Liko Research & Development ABInventor: Gunnar Liljedahl
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Publication number: 20190247255Abstract: Overhead lifts with control systems are disclosed. The overhead lifts may include a lift actuator communicatively coupled to a control system. The control system may include a control unit comprising a processor and a memory having computer readable and executable instructions and at least one port for communicatively coupling the control unit to at least one of a computer, a network, and a data storage device. The processor executes the computer readable and executable instructions to: determine at least one operating characteristic of the overhead lift and an operating time of the overhead lift as the overhead lift is actuated; determine an accumulated load-time parameter for the overhead lift based on the at least one operating characteristic and the operating time; and provide an indication that a component of the overhead lift requires service based on the comparison of the accumulated load-time parameter to a service constant.Type: ApplicationFiled: April 26, 2019Publication date: August 15, 2019Applicant: Liko Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 10322046Abstract: A control system for a lifting device and a lifting device comprising the same are disclosed. The control system includes a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions. A battery is electrically coupled to the control unit in addition to at least one indicator. The processor executes the computer readable and executable instructions to: determine an operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determine an accumulated load-time parameter for the lifting device based on the operating characteristic and the operating time; store the accumulated load-time parameter in the memory of the lift control system; compare the accumulated load-time parameter to a service constant; and provide an indication the indicator that a lift structural component requires service based on the comparison.Type: GrantFiled: November 23, 2016Date of Patent: June 18, 2019Assignee: Liko Research & Development ABInventor: Gunnar Liljedahl
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Publication number: 20170071807Abstract: A control system for a lifting device and a lifting device comprising the same are disclosed. The control system includes a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions. A battery is electrically coupled to the control unit in addition to at least one indicator. The processor executes the computer readable and executable instructions to: determine an operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determine an accumulated load-time parameter for the lifting device based on the operating characteristic and the operating time; store the accumulated load-time parameter in the memory of the lift control system; compare the accumulated load-time parameter to a service constant; and provide an indication the indicator that a lift structural component requires service based on the comparison.Type: ApplicationFiled: November 23, 2016Publication date: March 16, 2017Inventor: Gunnar Liljedahl
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Patent number: 9527699Abstract: A control system for a lifting device and a lifting device comprising the same are disclosed. The control system includes a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions. A battery is electrically coupled to the control unit in addition to at least one indicator. The processor executes the computer readable and executable instructions to: determine an operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determine an accumulated load-time parameter for the lifting device based on the operating characteristic and the operating time; store the accumulated load-time parameter in the memory of the lift control system; compare the accumulated load-time parameter to a service constant; and provide an indication the indicator that a lift structural component requires service based on the comparison.Type: GrantFiled: March 12, 2013Date of Patent: December 27, 2016Assignee: LIKO RESEARCH & DEVELOPMENT ABInventor: Gunnar Liljedahl
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Patent number: 8474794Abstract: A control system for a lifting device and a lifting device comprising the same are disclosed. The control system includes a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions. A battery is electrically coupled to the control unit in addition to at least one indicator. The processor executes the computer readable and executable instructions to: determine an operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determine an accumulated load-time parameter for the lifting device based on the operating characteristic and the operating time; store the accumulated load-time parameter in the memory of the lift control system; compare the accumulated load-time parameter to a service constant; and provide an indication the indicator that a lift structural component requires service based on the comparison.Type: GrantFiled: March 4, 2010Date of Patent: July 2, 2013Assignee: Liko Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 8393597Abstract: A control system for a lifting device and a lifting device comprising the same are disclosed. The control system includes a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions. A battery is electrically coupled to the control unit in addition to at least one indicator. The processor executes the computer readable and executable instructions to: determine an operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determine an accumulated load-time parameter for the lifting device based on the operating characteristic and the operating time; store the accumulated load-time parameter in the memory of the lift control system; compare the accumulated load-time parameter to a service constant; and provide an indication the indicator that a lift structural component requires service based on the comparison.Type: GrantFiled: March 4, 2010Date of Patent: March 12, 2013Assignee: Liko Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 8240437Abstract: A brake system for a rollator may include a brake handle, a braking device operatively coupled to the brake handle, and a gear rim mechanically coupled to at least one wheel of the rollator. The brake handle may be pivotally attached to a frame of the rollator and comprises a service-brake position and a parking-brake position while the braking device may be disposed on the frame of the rollator proximate the at least one wheel. When the brake handle is in a service-brake position, a braking member of the braking device is frictionally engaged with an inner portion of a rim of the at least one wheel thereby braking the wheel. When the handle is in a parking-brake position, the braking member of the braking device is engaged with teeth of the gear rim thereby preventing the wheel from rotating.Type: GrantFiled: February 3, 2009Date of Patent: August 14, 2012Assignee: Liko Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 7976086Abstract: A safety locking device for a lifting hook comprising a lifting part and a hook part having a first and a second shank arranged in the same plane, the first shank being attached to the lifting part. The safety-locking device is pivotably attached to either of the shanks or the lifting part and comprises a spring means formed integrally with the safety locking device, one end of which is attached to the safety locking device diametrically opposed its fastening point to either shank or the lifting part and the other end is arranged to bear on the opposite shank or the lifting part, to which the safety locking device is pivotably attached to automatically bring the safety locking device to bear on the lifting part or the opposite shank so as to prevent unhooking of a hoisting cable or similar means introduced into the hook part.Type: GrantFiled: April 20, 2007Date of Patent: July 12, 2011Assignee: Liko Research & Development ABInventor: Gunnar Liljedahl
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Publication number: 20100224841Abstract: A control system for a lifting device and a lifting device comprising the same are disclosed. The control system includes a control unit comprising a processor with a memory communicatively coupled to the processor and having computer readable and executable instructions. A battery is electrically coupled to the control unit in addition to at least one indicator. The processor executes the computer readable and executable instructions to: determine an operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determine an accumulated load-time parameter for the lifting device based on the operating characteristic and the operating time; store the accumulated load-time parameter in the memory of the lift control system; compare the accumulated load-time parameter to a service constant; and provide an indication the indicator that a lift structural component requires service based on the comparison.Type: ApplicationFiled: March 4, 2010Publication date: September 9, 2010Applicant: LIKO RESEARCH & DEVELOPMENT ABInventor: Gunnar Liljedahl
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Patent number: 7647655Abstract: A support frame assembly for attachment to a support mast of a transport apparatus may include a support frame with a pair of downwardly directed mounting posts. Support arms may be pivotally attached to an end of each mounting post. The support arms may each comprise a back support and an open position and a closed position. When the support arms are in the closed positioned the back supports may be substantially horizontally oriented defining a support area between the support arms, the back supports and the support frame. When the support arms are in the open position the back supports may be substantially vertically oriented and the support area is open opposite the support frame.Type: GrantFiled: February 15, 2006Date of Patent: January 19, 2010Assignee: LIKO Research & Development ABInventor: Gunnar Liljedahl
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Patent number: 7604219Abstract: Patient lift systems having a telescoping lifting apparatus include a telescopically displaceable lifting beam and a fixed lifting beam. The telescopically displaceable lifting beam may be operable to extend out from the fixed lifting beam to a protruded position. A casing may be brought to surround both the telescopically displaceable lifting beam and the fixed lifting beam and extend a certain distance over both the telescopically displaceable lifting beam and the fixed lifting beam when the telescopically displaceable lifting beam is in the protruded position. A pressure spring may be situated within the casing between a top end of the casing, which may surround the telescopically displaceable lifting beam, and a spring support, which may attach to the fixed lifting beam.Type: GrantFiled: January 10, 2008Date of Patent: October 20, 2009Assignee: LIKO Research & Development ABInventor: Gunnar Liljedahl
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Publication number: 20090206049Abstract: A safety locking device (1) for a lifting hook (2) comprising a lifting part (3) and a hook part (4) having a first and a second shank (5, 6) arranged in the same plane, the first shank (5) being attached to the lifting part (3). The safety-locking device (1) is pivotably attached to either of the shanks or the lifting part (3) and comprises a spring means (7) formed integrally with the safety locking device, one end of which is attached to the safety locking device (1) diametrically opposed its fastening point to either shank or the lifting part and the other end is arranged to bear on the opposite shank or the lifting part (3), to which the safety locking device is pivotably attached to automatically bring the safety locking device (1) to bear on the lifting part (3) or the opposite shank so as to prevent unhooking of a hoisting cable or similar means introduced into the hook part.Type: ApplicationFiled: April 20, 2007Publication date: August 20, 2009Inventor: Gunnar Liljedahl
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Publication number: 20090194373Abstract: A brake system for a rollator may include a brake handle, a braking device operatively coupled to the brake handle, and a gear rim mechanically coupled to at least one wheel of the rollator. The brake handle may be pivotally attached to a frame of the rollator and comprises a service-brake position and a parking-brake position while the braking device may be disposed on the frame of the rollator proximate the at least one wheel. When the brake handle is in a service-brake position, a braking member of the braking device is frictionally engaged with an inner portion of a rim of the at least one wheel thereby braking the wheel. When the handle is in a parking-brake position, the braking member of the braking device is engaged with teeth of the gear rim thereby preventing the wheel from rotating.Type: ApplicationFiled: February 3, 2009Publication date: August 6, 2009Applicant: LIKO RESEARCH & DEVELOPMENT ABInventor: Gunnar Liljedahl
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Publication number: 20090119835Abstract: Apparatus for transportation of a disabled person in standing position by which apparatus the person is able by his own strength to rise himself from a sitting position to a standing position, including a wheeled base (1) in the form of an U-shaped frame provided with a footrest (3) and a post (2), which supports at least one support frame (5). The support frame (5) comprises two legs (6a, 6b), which each at its end support through locking means (7a, 7b) an arm (8a, 8b), which is fixed in the longitudinal direction but pivotally arranged in the locking means, and that each arm (8a, 8b) has a supporting means (9) arranged in such a way that, when a person is standing, it can be pivoted behind the person, so that the person will be enclosed by the post (2), the support frame (5), the legs (8a, 8b), and the supporting means (9).Type: ApplicationFiled: February 15, 2006Publication date: May 14, 2009Inventor: Gunnar Liljedahl
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Patent number: D611393Type: GrantFiled: November 25, 2008Date of Patent: March 9, 2010Assignee: LIKO Research & Development ABInventor: Gunnar Liljedahl