Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Adaptive digital velocity control loop for a high performance elevator door system with low cost

Adaptive digital velocity control loop for a high performance elevator door system with low cost

US Patent 5384439 · Granted Jan 24, 1995

Estimated economic value: $9,043,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Elevator safety device2022
Preventative maintenance by detecting number of switching events of components2018
Elevator system with messaging for automated maintenance2017
Method and apparatus for initialization and operation of field-commutated motors2001
Current compensated choke filter for multi-phase motor drives2000
Deceleration time for an elevator car1999
Correction run for an elevator system1998
Calibration routine with adaptive load compensation1998
Double-drive automatic sliding door operator1998
Double-drive automatic sliding door operator1998
Elevator leveling adjustment1997
Elevator leveling adjustment1997