Patents Assigned to Leum Engineering, Inc.
  • Patent number: 12486127
    Abstract: The vehicle leveler includes a first portion which has a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The embodiment also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The device has opposing side portions and a walkway. The opposing side portions include at least one or more lights which illuminate the leveler and the walkway.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: December 2, 2025
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 12479676
    Abstract: The vehicle leveler includes a first portion which has a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge and forms a ramp section. The first portion has a flat section adjacent the trailing edge. The embodiment also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion includes an extension portion. The vehicle leveler also has at least one drainage aperture which is formed within and extends through the second portion for improved user safety.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: November 25, 2025
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 12214979
    Abstract: The device includes a first portion which has a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The embodiment also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is removably attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The device also includes an extension portion and opposing side portions, the opposing side portions extend the length of and contact the second portion and extension portion. The opposing side portions include at least one light which is controlled by a sensor adjacent to a door.
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: February 4, 2025
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 12024411
    Abstract: The device includes a first portion which has a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The embodiment also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is removably attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The first portion and second portion are separate from each other until they are removably attached by a connection apparatus. The device also includes at least one wheel chock with a corresponding wheel-chock track.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: July 2, 2024
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 12006170
    Abstract: A vehicle leveler which includes a first portion with a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The leveler also includes a second portion with a leading edge and a trailing edge, the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The vehicle leveler has a door interlock system with at least one pair of photoelectric sensors with a sensor path. When a vehicle is being loaded or unloaded on the vehicle leveler, and at least one of the vehicle doors is opened, the door blocks the sensor path of the photoelectric sensors and prevents the vehicle leveler from lowering or raising.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: June 11, 2024
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11858763
    Abstract: A vehicle leveler includes a first portion which has a leading edge and a trailing edge; the trailing edge is disposed further from the driveway than the leading edge. The vehicle leveler also includes a second portion which has a leading edge and a trailing edge; the leading edge of the second portion is attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The vehicle leveler also includes opposing side portions which extend the length of and contact the second portion and extension portion, the opposing side portions have a top surface which forms a walkway. A freestanding unitary vehicle wheel guide with a walkway is adjacent to the opposing side portions.
    Type: Grant
    Filed: December 13, 2022
    Date of Patent: January 2, 2024
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11772915
    Abstract: A vehicle leveler which includes a first portion with a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The leveler also includes a second portion with a leading edge and a trailing edge, the leading edge of the second portion is removably attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The vehicle leveler has opposing side portions which have a top surface that forms a walkway. The vehicle leveler having a power unit and a hydraulic system that provides power and allows movement of the first portion and second portion.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: October 3, 2023
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11745965
    Abstract: A vehicle leveler includes a first portion which has a leading edge and a trailing edge; the trailing edge is disposed further from the driveway than the leading edge. The vehicle leveler also includes a second portion which has a leading edge and a trailing edge; the leading edge of the second portion is attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The vehicle leveler has at least one tension bar connecting the first portion on a proximal end and a lift cylinder on a distal end as well as at least one tension strap. When the vehicle leveler is in an elevated position the tension bar and tension strap keeps the lift cylinder from accidentally shifting.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: September 5, 2023
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11577923
    Abstract: A portable dock plate which includes a planar ramp that has opposing side members, the ramp also has a top end and a bottom end, the top end includes a lip portion. The dock plate has a first wheel assembly and a second wheel assembly. The first wheel assembly includes a wheel, wheel lock linkage, a first locking pin with corresponding first locking pin holes, a lip-lowering apparatus and a lip-raising apparatus. The second wheel assembly has a wheel and a second locking pin with corresponding second locking pin holes. The dock plate also includes opposing handrails which are connected to the opposing side members, each handrail includes a moveable lever-handle for movement and placement of the dock plate.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: February 14, 2023
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11572239
    Abstract: The vehicle leveler includes a first portion which has a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The embodiment also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The vehicle leveler also includes opposing side portions which extend the length of and contact the second portion and extension portion, the opposing side portions have a top surface which forms a walkway.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: February 7, 2023
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11511954
    Abstract: A vehicle leveler which includes a first portion with a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The leveler also includes a second portion with a leading edge and a trailing edge, the leading edge of the second portion is removably attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The vehicle leveler has opposing side portions which have a top surface that forms a walkway. A safety barrier with two opposed gates is mounted adjacent to the vehicle leveler. The safety barrier when in an open position acts as a fall protection barrier for a user.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: November 29, 2022
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11273998
    Abstract: A vehicle leveler with a first portion which has a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The vehicle leveler also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion. The vehicle leveler also includes opposing side portions which extend the length of and contact the second portion and extension portion. The opposing side portions have a top surface which forms a walkway.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: March 15, 2022
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 11273999
    Abstract: A modular loading dock that includes a planar ramp member with lower and upper ends. The upper end abuts a preexisting structure and the lower end has a lower edge with a lip, the lip is able to be activated between an extended/engaged position to contact a truck bed. The ramp member has an at least thirteen foot long hydraulically-adjustable ramp section with an integrated dock leveler, the entire length of the ramp section is able to be moved between an upward and downward position. The loading dock also includes a base with top and bottom surfaces, the top surface has an opening to receive a dock leveler into the opening and a dock housing consisting of a modular frame mounted onto the base in sections. The length and adjustability of the planar ramp member allows accommodation of large-sized trailers as well as smaller-in-size delivery trucks and vans.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: March 15, 2022
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Publication number: 20200347982
    Abstract: A modular and impactable frame which includes an integrated dock leveler. The frame includes opposing front plates, opposing side members, opposing base members and an integral bracing structure which connects each side member to a respective base member, the base members each have a base plate and a pair of front and back supporting legs, each base plate is secured to the grade and is adjustable in a side-to-side direction as well as adjustable in a front-to-back direction so as to securely conform to and attach to the contour of the grade.
    Type: Application
    Filed: July 22, 2020
    Publication date: November 5, 2020
    Applicant: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 10815103
    Abstract: A vehicle leveler includes a first portion having a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The vehicle leveler also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is removably attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion which extends from the trailing edge of the second portion toward a rear of the leveler and includes a substantially flat section disposed about parallel with the substantially flat driveway. The first portion and second portion are separate from each other until they are removably attached by a connection apparatus.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: October 27, 2020
    Assignee: Leum Engineering, Inc.
    Inventor: Grant Leum
  • Publication number: 20200317455
    Abstract: A modular and impactable frame which includes an integrated dock leveler. The frame includes opposing front plates, opposing side members, opposing base members and an integral bracing structure which connects each side member to a respective base member, the base members each have a base plate and a pair of front and back supporting legs, each base plate is secured to the grade and is adjustable in a side-to-side direction as well as adjustable in a front-to-back direction so as to securely attach to the grade.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 8, 2020
    Applicant: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Publication number: 20200317481
    Abstract: A first embodiment of the device includes a first portion having a leading edge and a trailing edge, the trailing edge is disposed further from the driveway than the leading edge. The embodiment also includes a second portion which has a leading edge and a trailing edge, the leading edge of the second portion is removably attached to the trailing edge of the first portion and the leading edge of the second portion is disposed further from the driveway than the trailing edge of the second portion. The second portion also includes an extension portion which extends from the trailing edge of the second portion toward a rear of the leveler and includes a substantially flat section disposed about parallel with the substantially flat driveway. The first portion and second portion are separate from each other until they are removably attached by a connection apparatus.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 8, 2020
    Applicant: Leum Engineering, Inc.
    Inventor: Grant Leum
  • Patent number: 9944475
    Abstract: A dock leveler for an edge of a loading dock which includes a frame, a two-piece lip, a lift assist spring and an assist bar. The lift assist spring is connected on a first end to the bottom side of the lip at the pivot point and connected on a second end to the frame. The assist bar is used to move the lip between the extended/engaged and retracted/disengaged positions. By attaching the lip assist spring to the bottom of the distal lip portion, the force exerted on the lip causes it to maintain closure at the pivot point between the distal and proximal lip portions when in the extended/engaged position. Additionally, the distance between the lift assist spring and lip is minimized thereby dampening a fall distance when the lip becomes unsupported by a truck trailer; and the amount of force needed to actuate the assist bar is minimized.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: April 17, 2018
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: 9938094
    Abstract: A dock leveler for an edge of a loading dock which includes a frame, a two-piece lip, a lift assist spring, an assist bar and an integral safety barrier. The lift assist spring is connected on a first end to the bottom side of the lip at the pivot point and connected on a second end to the frame. The assist bar is used to move the lip between the extended/engaged and retracted/disengaged positions. The dock leveler includes a bracket with a vertical portion and a horizontal portion, the horizontal portion is secured to the frame on a frame-end and secured to the vertical portion on free-end. The lip can rotate above and over the bracket when in an extended/engaged position; the lip contacts the horizontal portion when in the retracted/disengaged position acting as a safety barrier.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: April 10, 2018
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath
  • Patent number: D968652
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: November 1, 2022
    Assignee: Leum Engineering, Inc.
    Inventors: Grant Leum, Eric Demerath