Accurate position tracking for motorized lifting device

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United States of America Patent

PATENT NO 9988248
SERIAL NO

14245308

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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. An encoder is provided to measure an angular position of the drum. A counter is provided to record a number of rotations of the drum. A locking mechanism automatically prevents rotation of the drum when the drum stops. Using this information, a processor may calculate an amount of line let out from the drum based on the number of rotations of the drum, the angular position of the drum, and a radius of the drum. In certain embodiments, the angular position and/or number of rotations is stored in non-volatile memory so that is can be recovered in the event of a power outage or other significant event.

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Patent Owner(s)

Patent OwnerAddress
HALL LABS LLC3000 SIERRA VISTA WAY PROVO UT 84606

International Classification(s)

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  • 2014 Application Filing Year
  • B66D Class
  • 138 Applications Filed
  • 118 Patents Issued To-Date
  • 85.51 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20142015201620172018201920200255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hall, David R Provo, US 1292 20766
Jones, Chris Spanish Fork, US 109 2334
Miles, Jerome Spanish Fork, US 135 520
Rees, Kevin Herriman, US 19 154

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Patent Citation Ranking

  • 2 Citation Count
  • B66D Class
  • 26.67 % this patent is cited more than
  • 7 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges16421101 - 1011 - 2021 - 3002.557.51012.51517.52022.52527.53032.53537.54042.545

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