Inventor · Berlin, DE

Peter Herkel

38Patents
9h-index
65Co-inventors
78Inventor score

Filing activity: Sep 28, 1990 → Nov 20, 2020

Most-cited inventions

PatentTitleAreaCited byStatus
US6173814A Electronic safety system for elevators having a dual redundant safety bus Electricity 96 Expired
US5076399A Elevator start control technique for reduced start jerk and acceleration overshoot Performing Operations; Transporting 20 Expired
US5157228A Adjusting technique for a digital elevator drive system Performing Operations; Transporting 18 Expired
US5677519A Elevator leveling adjustment Performing Operations; Transporting 17 Expired
US6170614A Electronic overspeed governor for elevators Performing Operations; Transporting 16 Expired
US8162108B2 Elevator having a limit switch for controlling power to the drive system as an elevator car approaches a shallow pit or a low overhead Performing Operations; Transporting 13 Active
US8365870B2 Foldable handrail and safety switch arrangement on top of an elevator car Performing Operations; Transporting 13 Active
US7523809B2 Elevator top of car safety Performing Operations; Transporting 10 Expired
US6079521A Measuring elevator position with scanning laser beam Performing Operations; Transporting 9 Expired
US8997968B2 Automatic adjustment of parameters for safety device Performing Operations; Transporting 9 Active
US5831227A Differential magnetic alignment of an elevator and a landing Performing Operations; Transporting 9 Expired
US5549179A Cost effective control of the main switches of an elevator drive motor Performing Operations; Transporting 9 Expired
US5765664A Elevator drive fault detector Electricity 7 Expired
US6591947B2 Use of multi-state sensors Performing Operations; Transporting 7 Expired
US9422133B2 Elevator car control in a landing zone using a machine brake in response to undesired car movement Performing Operations; Transporting 6 Active
US9051155B2 Elevator rescue system including communications over a rescue operation signal transmission path Performing Operations; Transporting 5 Active
US9120646B2 Systems and methods for determining functionality of an automatic door system Performing Operations; Transporting 5 Active
US9938115B2 System and method for limiting over-voltage in power supply system Performing Operations; Transporting 5 Active
US9376289B2 Elevator control system with sleep monitor Emerging Cross-Sectional Technologies 4 Active
US9371210B2 Elevator safety system having multiple buses Performing Operations; Transporting 4 Active
US8960407B2 Signal correlation for missing step detection in conveyors Performing Operations; Transporting 3 Active
US5260863A Control of a discontinuous current by a thyristor rectifier with inductive load Electricity 3 Expired
US5889238A Deceleration time for an elevator car Performing Operations; Transporting 2 Expired
US11485608B2 Elevator safety system Performing Operations; Transporting 2 Active
US7204347B2 Arrhythmic pulse sequence for sonic distance measurement Performing Operations; Transporting 2 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.