Inventor · disambiguated record
Richard E. Kulak
Also filed as: KULAK RICHARD · KULAK RICHARD E
43 granted patents·2 pending applications·560 citations·filing 1990–2021
98Inventor score
Top patents by PatentIndex Score
45 records- 0196US6446759B1Door coupler and latch system for elevator car and landing doorsOTIS ELEVATOR CO·Filed 2001·Granted Sep 10, 2002·61 cites·6 claims
- 0294US10569994B2Monitoring system, elevator door system having monitoring system, and methodOTIS ELEVATOR CO·Filed 2016·Granted Feb 25, 2020·4 cites·4 claims
- 0388US11034548B2Elevator door interlock assemblyOTIS ELEVATOR CO·Filed 2018·Granted Jun 15, 2021·2 cites·16 claims
- 0485US5487449AMagnetic elevator door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jan 30, 1996·40 cites·6 claims
- 0584US10710843B2Car door interlock with sill lockOTIS ELEVATOR CO·Filed 2016·Granted Jul 14, 2020·2 cites·20 claims
- 0682US5819877AElevator evacuation deterrent deviceOTIS ELEVATOR CO·Filed 1996·Granted Oct 13, 1998·45 cites·8 claims
- 0781US11795033B2Elevator car door interlockOTIS ELEVATOR CO·Filed 2021·Granted Oct 24, 2023·0 cites·9 claims
- 0879US11655122B2Elevator door in interlock assemblyOTIS ELEVATOR CO·Filed 2021·Granted May 23, 2023·0 cites·12 claims
- 0979US11046557B2Elevator door interlock assemblyOTIS ELEVATOR CO·Filed 2018·Granted Jun 29, 2021·1 cites·14 claims
- 1079US11040858B2Elevator door interlock assemblyOTIS ELEVATOR CO·Filed 2018·Granted Jun 22, 2021·1 cites·7 claims
- 1178US6296080B1Variable traction mechanism for rotary actuated overspeed safety deviceOTIS ELEVATOR CO·Filed 2000·Granted Oct 2, 2001·21 cites·4 claims
- 1275US11124389B2Elevator car door interlockOTIS ELEVATOR CO·Filed 2020·Granted Sep 21, 2021·0 cites·7 claims
- 1374US11661315B2Monitoring system, elevator door system having monitoring system, and methodOTIS ELEVATOR CO·Filed 2020·Granted May 30, 2023·0 cites·15 claims
- 1473US5732796AElevator car evacuation deterrent deviceOTIS ELEVATOR CO·Filed 1995·Granted Mar 31, 1998·29 cites·6 claims
- 1568US8272481B2Guide assembly for at least one elevator doorTRACEY MICHAEL·Filed 2005·Granted Sep 25, 2012·9 cites·23 claims
- 1668US7543686B2Elevator with rollers having selectively variable hardnessOTIS ELEVATOR CO·Filed 2003·Granted Jun 9, 2009·13 cites·16 claims
- 1768US5651428AStationary actuator moving vane elevator car door couplingOTIS ELEVATOR CO·Filed 1996·Granted Jul 29, 1997·27 cites·11 claims
- 1866US5612518ALinear induction motor door drive assembly for elevatorsOTIS ELEVATOR CO·Filed 1994·Granted Mar 18, 1997·22 cites·4 claims
- 1966US5454447AElevator hoistway door bolt lockOTIS ELEVATOR CO·Filed 1994·Granted Oct 3, 1995·22 cites·9 claims
- 2066US5139112AElevator car door lockOTIS ELEVATOR CO·Filed 1990·Granted Aug 18, 1992·22 cites·5 claims
- 2164US10882720B2Elevator car door interlockOTIS ELEVATOR CO·Filed 2016·Granted Jan 5, 2021·0 cites·11 claims
- 2261US5651427AElevator door coupling and hold-close apparatusOTIS ELEVATOR CO·Filed 1995·Granted Jul 29, 1997·21 cites·11 claims
- 2360US5503248AMaintaining open loop current drive to linear induction motorOTIS ELEVATOR CO·Filed 1994·Granted Apr 2, 1996·23 cites·6 claims
- 2459US5538106ARotationally stiff elevator car door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jul 23, 1996·18 cites·6 claims
- 2557US5736693AElevator door drive using dual secondary linear induction motorOTIS ELEVATOR CO·Filed 1995·Granted Apr 7, 1998·25 cites·3 claims
- 2654US11247872B2Elevator car door interlockOTIS ELEVATOR CO·Filed 2018·Granted Feb 15, 2022·0 cites·11 claims
- 2754US5509504AVelocity regulated, open current loop, variable voltage, variable frequency, linear induction motor drive for an elevator car doorOTIS ELEVATOR CO·Filed 1994·Granted Apr 23, 1996·20 cites·4 claims
- 2852US5495918ASmooth and quiet linear induction motor elevator door operationOTIS ELEVATOR CO·Filed 1994·Granted Mar 5, 1996·15 cites·4 claims
- 2951US10486940B2Alignment system for an elevator carOTIS ELEVATOR CO·Filed 2016·Granted Nov 26, 2019·0 cites·8 claims
- 3050US11254542B2Car door interlockOTIS ELEVATOR CO·Filed 2018·Granted Feb 22, 2022·0 cites·16 claims
- 3149US5808246ATriac drive for three-phase line-powered linear induction motor elevator door operatorOTIS ELEVATOR CO·Filed 1995·Granted Sep 15, 1998·15 cites·9 claims
- 3248US5668355AElevator cab door drive systemOTIS ELEVATOR CO·Filed 1994·Granted Sep 16, 1997·13 cites·3 claims
- 3346US6457569B2Rotary actuated overspeed safety deviceOTIS ELEVATOR CO·Filed 1999·Granted Oct 1, 2002·12 cites·8 claims
- 3445US5862887AHigh performance linear induction motor door operatorOTIS ELEVATOR CO·Filed 1996·Granted Jan 26, 1999·15 cites·5 claims
- 3542US5435415ACammed wedge elevator car door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jul 25, 1995·10 cites·8 claims
- 3641US5494137AElevator door mounting systemOTIS ELEVATOR CO·Filed 1994·Granted Feb 27, 1996·12 cites·6 claims
- 3741US5485896ARotary elevator car door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jan 23, 1996·9 cites·4 claims
- 3839US5682023ATime-optimal control of an AC line-driven linear motor elevator door operatorOTIS ELEVATOR CO·Filed 1995·Granted Oct 28, 1997·9 cites·15 claims
- 3938US2007000732A1Elevator roller guide with variable stiffness damperKULAK RICHARD·Filed 2003·Application pending·0 cites
- 4036US5669465AElevator hoistway door bolt lockOTIS ELEVATOR CO·Filed 1995·Granted Sep 23, 1997·8 cites·7 claims
- 4136US2008011556A1Elevator door operator and interlock arrangementGALANTE TIMOTHY P·Filed 2003·Application pending·0 cites
- 4234US5880414AElevator door brake, brake, lock, and hold-openOTIS ELEVATOR CO·Filed 1997·Granted Mar 9, 1999·6 cites·2 claims
- 4332US5482142AQuiet elevator rotary gate switchOTIS ELEVATOR CO·Filed 1994·Granted Jan 9, 1996·3 cites·4 claims
- 4427US5203431AElevator rotary lost door interlockOTIS ELEVATOR CO·Filed 1992·Granted Apr 20, 1993·3 cites·7 claims
- 4526US5207298AElevator rotary door interlockOTIS ELEVATOR CO·Filed 1992·Granted May 4, 1993·2 cites·6 claims
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