Roberts; Randall K.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Roberts; Randall K..The latest application filed is for "active damping of vertical oscillation of a hovering elevator car".
- Roberts; Randall K. - Hebron CT
- Roberts; Randall K. - Amston CT
| Patent | Date |
|---|---|
| Active damping of a hovering elevator car based on vertical oscillation of the hovering elevator car Grant 10,099,894 - Roberts , et al. October 16, 2 | 2018-10-16 |
| Active Damping Of Vertical Oscillation Of A Hovering Elevator Car App 20160023864 - Roberts; Randall K. ; et al. | 2016-01-28 |
| Multi-car elevator hoistway separation assurance Grant 9,010,499 - McCarthy , et al. April 21, 2 | 2015-04-21 |
| Elevator Damper Assembly App 20100032248 - Kwon; Yisug ; et al. | 2010-02-11 |
| Multi-car Elevator Hoistway Separation Assurance App 20090194371 - McCarthy; Richard C. ; et al. | 2009-08-06 |
| Semi-active elevator hitch Grant 6,216,824 - Fuller , et al. April 17, 2 | 2001-04-17 |
| Elevator active guidance system having a model-based multi-input multi-output controller Grant 5,866,861 - Rajamani , et al. February 2, 1 | 1999-02-02 |
| Elevator system having a force-estimation or position-scheduled current command controller Grant 5,814,774 - Remmers , et al. September 29, 1 | 1998-09-29 |
| Active elevator hitch Grant 5,750,945 - Fuller , et al. May 12, 1 | 1998-05-12 |
| Elevator active guidance system having a coordinated controller Grant 5,652,414 - Roberts , et al. July 29, 1 | 1997-07-29 |
| Elevator ride quality Grant 5,329,077 - Skalski , et al. July 12, 1 | 1994-07-12 |
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