Inventor · disambiguated record
Randall Keith Roberts
Also filed as: ROBERTS RANDALL · ROBERTS RANDALL K · ROBERTS RANDALL KEITH
36 granted patents·10 pending applications·428 citations·filing 1990–2023
97Inventor score
Files withOTIS ELEVATOR CO34ROBERTS RANDALL KEITH5MANGINI RICHARD J2CHRISTY THERESA M1FARGO RICHARD N1
Top patents by PatentIndex Score
46 records- 0195US10035684B2Elevator component separation assurance system and method of operationOTIS ELEVATOR CO·Filed 2016·Granted Jul 31, 2018·5 cites·8 claims
- 0294US9359172B2Elevator rope sway detection and dampingMANGINI RICHARD J·Filed 2010·Granted Jun 7, 2016·27 cites·14 claims
- 0393US10118802B2Structural health monitoring of an escalator drive systemOTIS ELEVATOR CO·Filed 2015·Granted Nov 6, 2018·8 cites·14 claims
- 0493US8136635B2Method and system for maintaining distance between elevator cars in an elevator system with multiple cars in a single hoistwayCHRISTY THERESA M·Filed 2006·Granted Mar 20, 2012·35 cites·20 claims
- 0589US10407275B2Detection and control system for elevator operationsOTIS ELEVATOR CO·Filed 2016·Granted Sep 10, 2019·4 cites·21 claims
- 0688US10399821B2Vibration-based elevator tension member wear and life monitoring systemOTIS ELEVATOR CO·Filed 2015·Granted Sep 3, 2019·3 cites·12 claims
- 0787US8297412B2Elevator dispatching control for sway mitigationROBERTS RANDALL KEITH·Filed 2008·Granted Oct 30, 2012·18 cites·20 claims
- 0886US5652414AElevator active guidance system having a coordinated controllerOTIS ELEVATOR CO·Filed 1994·Granted Jul 29, 1997·41 cites·24 claims
- 0984US10689228B2Elevator system evaluation deviceOTIS ELEVATOR CO·Filed 2016·Granted Jun 23, 2020·2 cites·10 claims
- 1083US10294074B2Elevator recovery carOTIS ELEVATOR CO·Filed 2016·Granted May 21, 2019·2 cites·19 claims
- 1183US9840395B2Multi-drive thrust manager for elevator controlOTIS ELEVATOR CO·Filed 2016·Granted Dec 12, 2017·2 cites·20 claims
- 1281US10252879B2Brake operation management in elevatorsOTIS ELEVATOR CO·Filed 2014·Granted Apr 9, 2019·6 cites·14 claims
- 1380US5750945AActive elevator hitchOTIS ELEVATOR CO·Filed 1996·Granted May 12, 1998·36 cites·26 claims
- 1479US9914619B2Elevator rope sway mitigationROBERTS RANDALL KEITH·Filed 2012·Granted Mar 13, 2018·6 cites·8 claims
- 1579US9038783B2Rope sway mitigation via rope tension adjustmentROBERTS RANDALL KEITH·Filed 2009·Granted May 26, 2015·11 cites·20 claims
- 1679US5866861AElevator active guidance system having a model-based multi-input multi-output controllerOTIS ELEVATOR CO·Filed 1996·Granted Feb 2, 1999·37 cites·3 claims
- 1779US5544721AMethod and apparatus for adjusting an elevator car based on stored horizontal displacement and acceleration informationOTIS ELEVATOR CO·Filed 1994·Granted Aug 13, 1996·31 cites·6 claims
- 1878US9321610B2Frictional damper for reducing elevator car movementFARGO RICHARD N·Filed 2010·Granted Apr 26, 2016·7 cites·19 claims
- 1978US5308938AElevator active suspension systemOTIS ELEVATOR CO·Filed 1990·Granted May 3, 1994·30 cites·37 claims
- 2074US9546073B2Rope sway mitigation through control of access to elevatorsOTIS ELEVATOR CO·Filed 2013·Granted Jan 17, 2017·4 cites·17 claims
- 2174US8746411B2Elevator car positioning including gain adjustment based upon whether a vibration damper is activatedROBERTS RANDALL KEITH·Filed 2008·Granted Jun 10, 2014·9 cites·19 claims
- 2272US10865071B2Configurable multicar elevator systemOTIS ELEVATOR CO·Filed 2015·Granted Dec 15, 2020·1 cites·16 claims
- 2370US9010499B2Multi-car elevator hoistway separation assuranceMCCARTHY RICHARD C·Filed 2006·Granted Apr 21, 2015·10 cites·1 claims
- 2469US10538412B2Brake operation management in elevatorsOTIS ELEVATOR CO·Filed 2019·Granted Jan 21, 2020·0 cites·15 claims
- 2569US8360209B2Dynamic compensation during elevator car re-levelingOTIS ELEVATOR CO·Filed 2008·Granted Jan 29, 2013·7 cites·23 claims
- 2669US5329077AElevator ride qualityOTIS ELEVATOR CO·Filed 1993·Granted Jul 12, 1994·24 cites·6 claims
- 2768US2025059004A1Escalator combplate retraction deviceOTIS ELEVATOR CO·Filed 2023·Application pending·0 cites
- 2867US10421642B2Elevator component separation assurance system and method of operationOTIS ELEVATOR CO·Filed 2018·Granted Sep 24, 2019·0 cites·12 claims
- 2964US2025042699A1Escalator entrapment detection systemOTIS ELEVATOR CO·Filed 2023·Application pending·0 cites
- 3064US2025051141A1Escalator entrapment detection systemOTIS ELEVATOR CO·Filed 2023·Application pending·0 cites
- 3163US8459415B2Elevator motion profile control including non-instantaneous transition between jerk valuesKWON YISUG·Filed 2008·Granted Jun 11, 2013·6 cites·18 claims
- 3260US9975735B2Cab isolation of an elevator carOTIS ELEVATOR CO·Filed 2016·Granted May 22, 2018·0 cites·19 claims
- 3360US2025122050A1Elevator tension member elongation and stiffness monitoring systemOTIS ELEVATOR CO·Filed 2023·Application pending·0 cites
- 3460US2025115459A1Elevator pit vertical entrance safety net systemOTIS ELEVATOR CO·Filed 2023·Application pending·0 cites
- 3556US10399820B2Elevator tension member stiffness estimation and monitoringOTIS ELEVATOR CO·Filed 2014·Granted Sep 3, 2019·1 cites·17 claims
- 3655US10472206B2Sensor failure detection and fusion system for a multi-car ropeless elevator systemOTIS ELEVATOR CO·Filed 2016·Granted Nov 12, 2019·0 cites·20 claims
- 3755US10099894B2Active damping of a hovering elevator car based on vertical oscillation of the hovering elevator carOTIS ELEVATOR CO·Filed 2013·Granted Oct 16, 2018·1 cites·20 claims
- 3853US10532908B2Thrust and moment control system for controlling linear motor alignment in an elevator systemOTIS ELEVATOR CO·Filed 2016·Granted Jan 14, 2020·0 cites·15 claims
- 3953US6216824B1Semi-active elevator hitchUNITED TECHNOLOGIES CORP·Filed 1998·Granted Apr 17, 2001·16 cites·11 claims
- 4049US5814774AElevator system having a force-estimation or position-scheduled current command controllerOTIS ELEVATOR CO·Filed 1996·Granted Sep 29, 1998·28 cites·13 claims
- 4143US5524730AMethod and apparatus for storing sensed elevator horizontal displacement and acceleration signalsOTIS ELEVATOR CO·Filed 1994·Granted Jun 11, 1996·10 cites·15 claims
- 4242US2010065381A1Sway mitigation in an elevator systemROBERTS RANDALL KEITH·Filed 2006·Application pending·0 cites
- 4342US2017369280A1Buffering device for multiple-car elevator systemOTIS ELEVATOR CO·Filed 2016·Application pending·0 cites
- 4442US2017057782A1Improved elevator releveling controlOTIS ELEVATOR CO·Filed 2014·Application pending·0 cites
- 4541US2010032248A1Elevator damper assemblyOTIS ELEVATOR CO·Filed 2006·Application pending·0 cites
- 4637US2013048438A1Elevator system with rope sway mitigationMANGINI RICHARD J·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →