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David R. Polak

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  • Glastonbury, CT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sheave for elevator system
    • Patent number 10,773,929
    • Issue date Sep 15, 2020
    • Otis Elevator Company
    • Jun Ma
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    System and method for reducing belt noise
    • Patent number 10,336,581
    • Issue date Jul 2, 2019
    • Otis Elevator Company
    • David R. Polak
    • D07 - ROPES CABLES OTHER THAN ELECTRIC
  • Information Patent Grant

    Elevator virtual aerodynamic shroud
    • Patent number 10,246,300
    • Issue date Apr 2, 2019
    • Otis Elevator Company
    • David R. Polak
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Coated sheave
    • Patent number 9,815,667
    • Issue date Nov 14, 2017
    • Otis Elevator Company
    • Xiaomei Yu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sheave for an elevator system
    • Patent number 9,630,806
    • Issue date Apr 25, 2017
    • Otis Elevator Company
    • John P. Wesson
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    System for reducing compressor noise
    • Patent number 8,167,540
    • Issue date May 1, 2012
    • Hamilton Sundstrand Corporation
    • Robert Hans Schlinker
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

  • Information Patent Application

    ELEVATOR SYSTEM
    • Publication number 20210101776
    • Publication date Apr 8, 2021
    • Otis Elevator Company
    • Stephen R. Nichols
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Application

    METHODS AND SYSTEMS FOR ELEVATOR CROWD PREDICTION
    • Publication number 20210024326
    • Publication date Jan 28, 2021
    • Otis Elevator Company
    • David R. Polak
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Application

    SHEAVE FOR ELEVATOR SYSTEM
    • Publication number 20170267497
    • Publication date Sep 21, 2017
    • Jun Ma
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Application

    ELEVATOR SAFETY SPRING AND METHOD OF MANUFACTURING
    • Publication number 20170261058
    • Publication date Sep 14, 2017
    • Otis Elevator Company
    • Shihemn Chen
    • B33 - ADDITIVE MANUFACTURING TECHNOLOGY
  • Information Patent Application

    Elevator Virtual Aerodynamic Shroud
    • Publication number 20170001838
    • Publication date Jan 5, 2017
    • Otis Elevator Company
    • David R. Polak
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Application

    COATED SHEAVE
    • Publication number 20150166307
    • Publication date Jun 18, 2015
    • Otis Elevator Company
    • Xiaomei Yu
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
  • Information Patent Application

    SHEAVE FOR AN ELEVATOR SYSTEM
    • Publication number 20150129366
    • Publication date May 14, 2015
    • John P. Wesson
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Application

    System And Method For Reducing Belt Noise
    • Publication number 20130292211
    • Publication date Nov 7, 2013
    • David R. Polak
    • D07 - ROPES CABLES OTHER THAN ELECTRIC
  • Information Patent Application

    System for reducing compressor noise
    • Publication number 20090191047
    • Publication date Jul 30, 2009
    • Hamilton Sundstrand Corporation
    • Robert Hans Schlinker
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...