An apparatus includes a drum to draw in or let out a line and a motor and transmission coupled to the drum to apply a torque thereto. A tracking module tracks an actual amount of line let out from the drum. A servo control unit receives the actual amount, compares the actual amount to a desired amount of line to let out from the drum, and generates an error signal reflecting a difference between the actual amount and the desired amount. A modulation module generates, from the error signal, a control signal to control the motor, thereby bringing the actual amount into better alignment with the desired amount.


    Access

    Download


    Export, share and cite



    Title :

    Intelligent Motorized Lifting Device


    Contributors:
    HALL DAVID R (author) / MILES JEROME (author) / HYER DAVIDO (author) / JONES CHRIS (author) / REES KEVIN (author)

    Publication date :

    2015-10-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66D Haspeln , CAPSTANS



    Intelligent motorized lifting device

    HALL DAVID R / MILES JEROME / HYER DAVIDO et al. | European Patent Office | 2018

    Free access

    Compact Motorized Lifting Device

    HALL DAVID R / MILES JEROME / HALL MICHAEL et al. | European Patent Office | 2015

    Free access

    Compact motorized lifting device

    HALL DAVID R / MILES JEROME / HALL MICHAEL et al. | European Patent Office | 2018

    Free access

    Motorized snow vehicle lifting device

    THOMSEN RONALD TIB | European Patent Office | 2017

    Free access

    MOTORIZED SNOW VEHICLE LIFTING DEVICE

    THOMSEN RONALD TIB | European Patent Office | 2016

    Free access