Vehicle doorway lift Patent #: 4168134
ApplicationNo. 07/025653 filed on 03/13/1987
US Classes:414/557, Tailgate414/917HANDLERS UTILIZING PARALLEL LINKS
ExaminersPrimary: Paperner, Leslie J.
Assistant: Bucci, David A.
Attorney, Agent or Firm
International ClassB60P 1/44 (20060101)
AbstractA lift gate assembly including a U-shaped base having horizontal central section flanked by parallel upstanding legs, a gate, and a pair of upstanding legs secured to the gate in alignment with the legs and the base. Links extending between the legs define two parallelogram linkages and a torsion bar extends between and is rigidly attached to a corresponding link in each of the parallelogram linkages. Preferably, the torsion bar defines the lower pivot of the parallelogram linkage and extends between the legs of the base and the lowermost links in each parallelogram linkage, being rigidly attached thereto. Hydraulic cylinders are provided for each parallelogram linkage to raise and lower the gate.
Field of SearchTailgate
With load-receiving portion, or significant section thereof, pivotable relative to horizontal
Discharge gate-carried loading means
Load-receiving portion includes means which extends longitudinally therefrom to form ramp when portion pivots
With means to raise load above load-receiving portion for deposit thereon or therein
Having elevating load body
Carrier comprises movable component of load-receiving portion (e.g., tailgate, section of floor, etc.)
Carrier comprises movable component of load-receiving portion
Raising or lowering of load or load holder includes curvilinear movement
HANDICAPPED PERSON HANDLING
HANDLERS UTILIZING PARALLEL LINKS