Inventor
ROBERTS RANDALL K
US11 patents
⚠️ This page may combine multiple inventors who share the name “ROBERTS RANDALL K”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ELEVATOR CO
9 patentsUS5814774ASep 29, 1998
Elevator system having a force-estimation or position-scheduled current command controller
OTIS ELEVATOR CO28 citations92
US5750945AMay 12, 1998
Active elevator hitch
OTIS ELEVATOR CO36 citations92
US5652414AJul 29, 1997
Elevator active guidance system having a coordinated controller
OTIS ELEVATOR CO41 citations92
US5544721AAug 13, 1996
Method and apparatus for adjusting an elevator car based on stored horizontal displacement and acceleration information
OTIS ELEVATOR CO31 citations92
US5329077AJul 12, 1994
Elevator ride quality
OTIS ELEVATOR CO24 citations92
US5308938AMay 3, 1994
Elevator active suspension system
OTIS ELEVATOR CO30 citations92
US5866861AFeb 2, 1999
Elevator active guidance system having a model-based multi-input multi-output controller
OTIS ELEVATOR CO37 citations91
US5524730AJun 11, 1996
Method and apparatus for storing sensed elevator horizontal displacement and acceleration signals
OTIS ELEVATOR CO10 citations73
US10099894B2Oct 16, 2018
Active damping of a hovering elevator car based on vertical oscillation of the hovering elevator car
OTIS ELEVATOR CO1 citations52