Inventor
KOWALCZYK THOMAS M
US35 patents
⚠️ This page may combine multiple inventors who share the name “KOWALCZYK THOMAS M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ELEVATOR CO
21 patentsUS5949036ASep 7, 1999
Double linear motor and elevator doors using same
OTIS ELEVATOR CO25 citations92
US5736693AApr 7, 1998
Elevator door drive using dual secondary linear induction motor
OTIS ELEVATOR CO25 citations92
US5732796AMar 31, 1998
Elevator car evacuation deterrent device
OTIS ELEVATOR CO29 citations92
US5651427AJul 29, 1997
Elevator door coupling and hold-close apparatus
OTIS ELEVATOR CO21 citations92
US5651428AJul 29, 1997
Stationary actuator moving vane elevator car door coupling
OTIS ELEVATOR CO27 citations92
US5612518AMar 18, 1997
Linear induction motor door drive assembly for elevators
OTIS ELEVATOR CO22 citations92
US5509504AApr 23, 1996
Velocity regulated, open current loop, variable voltage, variable frequency, linear induction motor drive for an elevator car door
OTIS ELEVATOR CO20 citations92
US5503248AApr 2, 1996
Maintaining open loop current drive to linear induction motor
OTIS ELEVATOR CO23 citations92
US5454447AOct 3, 1995
Elevator hoistway door bolt lock
OTIS ELEVATOR CO22 citations92
US5918706AJul 6, 1999
Hold closed feature for elevator car doors
OTIS ELEVATOR CO10 citations74
US5808246ASep 15, 1998
Triac drive for three-phase line-powered linear induction motor elevator door operator
OTIS ELEVATOR CO15 citations74
US5682023AOct 28, 1997
Time-optimal control of an AC line-driven linear motor elevator door operator
OTIS ELEVATOR CO9 citations74
US5669465ASep 23, 1997
Elevator hoistway door bolt lock
OTIS ELEVATOR CO8 citations74
US5668355ASep 16, 1997
Elevator cab door drive system
OTIS ELEVATOR CO13 citations74
US5538106AJul 23, 1996
Rotationally stiff elevator car door coupling
OTIS ELEVATOR CO18 citations74
US5495918AMar 5, 1996
Smooth and quiet linear induction motor elevator door operation
OTIS ELEVATOR CO15 citations74
US5494137AFeb 27, 1996
Elevator door mounting system
OTIS ELEVATOR CO12 citations74
US5485896AJan 23, 1996
Rotary elevator car door coupling
OTIS ELEVATOR CO9 citations74
US5435415AJul 25, 1995
Cammed wedge elevator car door coupling
OTIS ELEVATOR CO10 citations74
US5862887AJan 26, 1999
High performance linear induction motor door operator
OTIS ELEVATOR CO15 citations73
US5880414AMar 9, 1999
Elevator door brake, brake, lock, and hold-open
OTIS ELEVATOR CO6 citations62
STANLEY WORKS
6 patentsUS6588153B1Jul 8, 2003
Power door kit
STANLEY WORKS76 citations98
US6481160B1Nov 19, 2002
Axial door operator
STANLEY WORKS139 citations98
US6553717B2Apr 29, 2003
Retrofit power door assembly
STANLEY WORKS81 citations97
US6786006B2Sep 7, 2004
Automatic door assembly and door operator therefor
STANLEY WORKS56 citations95
US6530178B1Mar 11, 2003
Automatic door assembly and door operator therefor
STANLEY WORKS48 citations95
US6336294B1Jan 8, 2002
Automatic door assembly and door operator therefor
STANLEY WORKS68 citations95