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).

  • Publication number: 20200375831
    Abstract: 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: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Applicant: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: 10780004
    Abstract: 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: Grant
    Filed: April 26, 2019
    Date of Patent: September 22, 2020
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Publication number: 20190247255
    Abstract: 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: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Applicant: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: 10322046
    Abstract: 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: Grant
    Filed: November 23, 2016
    Date of Patent: June 18, 2019
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Publication number: 20170071807
    Abstract: 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: Application
    Filed: November 23, 2016
    Publication date: March 16, 2017
    Inventor: Gunnar Liljedahl
  • Patent number: 9527699
    Abstract: 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: Grant
    Filed: March 12, 2013
    Date of Patent: December 27, 2016
    Assignee: LIKO RESEARCH & DEVELOPMENT AB
    Inventor: Gunnar Liljedahl
  • Patent number: 8474794
    Abstract: 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: Grant
    Filed: March 4, 2010
    Date of Patent: July 2, 2013
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: 8393597
    Abstract: 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: Grant
    Filed: March 4, 2010
    Date of Patent: March 12, 2013
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: 8240437
    Abstract: 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: Grant
    Filed: February 3, 2009
    Date of Patent: August 14, 2012
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: 7976086
    Abstract: 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: Grant
    Filed: April 20, 2007
    Date of Patent: July 12, 2011
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Publication number: 20100224841
    Abstract: 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: Application
    Filed: March 4, 2010
    Publication date: September 9, 2010
    Applicant: LIKO RESEARCH & DEVELOPMENT AB
    Inventor: Gunnar Liljedahl
  • Patent number: 7647655
    Abstract: 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: Grant
    Filed: February 15, 2006
    Date of Patent: January 19, 2010
    Assignee: LIKO Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: 7604219
    Abstract: 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: Grant
    Filed: January 10, 2008
    Date of Patent: October 20, 2009
    Assignee: LIKO Research & Development AB
    Inventor: Gunnar Liljedahl
  • Publication number: 20090206049
    Abstract: 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: Application
    Filed: April 20, 2007
    Publication date: August 20, 2009
    Inventor: Gunnar Liljedahl
  • Publication number: 20090194373
    Abstract: 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: Application
    Filed: February 3, 2009
    Publication date: August 6, 2009
    Applicant: LIKO RESEARCH & DEVELOPMENT AB
    Inventor: Gunnar Liljedahl
  • Publication number: 20090119835
    Abstract: 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: Application
    Filed: February 15, 2006
    Publication date: May 14, 2009
    Inventor: Gunnar Liljedahl
  • Publication number: 20080173853
    Abstract: A lifting means includes at least two telescopically displaceable lifting beams (1, 2), of which one (2) is connected to a driving means (3) in order to displace the second lifting beam (1) to and fro within said first lifting beam. A casing (4) can be placed to surround both the lifting beams and rest against these and surrounds both the lifting beams an essential part when they are protruded. A pressure spring (5) is placed within the casing (4) in order to displace the casing (4) so it surrounds both the lifting arms (1, 2) when they are in the protruded position in relation to each other whereby the pressure spring rests against the end of the casing (4), which end surrounds the displaceable lifting arm (1). A support (6) for the second end of the pressure spring (5) is attached on the fixed lifting beam (2).
    Type: Application
    Filed: January 10, 2008
    Publication date: July 24, 2008
    Inventor: Gunnar Liljedahl
  • Patent number: 7165908
    Abstract: Two telescopic lifting beams are loaded in their protruded position and are driven from a retracted position to a protruded position. In order to improve the bending strength of the lifting beams, the lifting beams are surrounded by two telescopic tubes, one of the tubes being fixed to the outer end of the telescopic first lifting beam and is slideable on the second telescopic tube, which extends inwardly on the second lifting beam.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: January 23, 2007
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: D567190
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: April 22, 2008
    Assignee: Liko Research & Development AB
    Inventor: Gunnar Liljedahl
  • Patent number: D611393
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: March 9, 2010
    Assignee: LIKO Research & Development AB
    Inventor: Gunnar Liljedahl