Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12428815 | Swing pump controls | Pengfei Ma, Brett J. Janson, Sean Johnson | 2025-09-30 |
| 9951795 | Integration of swing energy recovery and engine anti-idling systems | Pengfei Ma, Dayao Chen, Jeremy T. Peterson, Emily A. Morris | 2018-04-24 |
| 9945396 | Fluid systems for machines with integrated energy recovery circuit | Aleksandar Egelja, Kalpesh Patel, Jiao Zhang, Pengfei Ma, Dayao Chen | 2018-04-17 |
| 9897120 | Hydraulic system having energy recovery | Jiao Zhang, Peter Spring, Pengfei Ma, Randal N. Peterson, Rustu Cesur | 2018-02-20 |
| 9809958 | Engine assist by recovering swing kinetic energy | Dayao Chen, Pengfei Ma | 2017-11-07 |
| 9556591 | Hydraulic system recovering swing kinetic and boom potential energy | Jiao Zhang, Pengfei Ma, Dayao Chen | 2017-01-31 |
| 9388828 | Hydraulic control system having swing motor energy recovery | Bryan J. Hillman, Jiao Zhang, Lawrence C. Tognetti, Peter Spring, Rustu Cesur | 2016-07-12 |
| 9366269 | Hydraulic accumulator health diagnosis | Dayao Chen, Pengfei Ma, Bryan J. Hillman | 2016-06-14 |
| 9328744 | Hydraulic control system having swing energy recovery | Rustu Cesur, Lawrence J. Tognetti, Pengfei Ma, Jiao Zhang | 2016-05-03 |
| 9315968 | Hydraulic control system for machine | Dayao Chen | 2016-04-19 |
| 9290911 | Energy recovery system for hydraulic machine | Pengfei Ma, Jiao Zhang, Dayao Chen, Gang Wen | 2016-03-22 |
| 9290912 | Energy recovery system having integrated boom/swing circuits | Gang Wen, Pengfei Ma, Jiao Zhang | 2016-03-22 |
| 9279236 | Electro-hydraulic system for recovering and reusing potential energy | Jiao Zhang, Pengfei Ma, Gang Wen, Bryan E. Nelson, Dayao Chen | 2016-03-08 |
| 9261118 | Boom cylinder dig flow regeneration | Jiao Zhang, Pengfei Ma, Vickram Murugesan, Bryan J. Hillman | 2016-02-16 |
| 9187878 | Hydraulic control system having swing oscillation dampening | Rustu Cesur, Bryan J. Hillman, Jiao Zhang | 2015-11-17 |
| 9139982 | Hydraulic control system having swing energy recovery | Pengfei Ma, Jiao Zhang, Dayao Chen | 2015-09-22 |
| 9091286 | Hydraulic control system having electronic flow limiting | Rustu Cesur, Jiao Zhang, Bryan J. Hillman, Peter Spring, Lawrence J. Tognetti +1 more | 2015-07-28 |
| 9086061 | Energy recovery hydraulic system | Jiao Zhang, Gang Wen, Pengfei Ma, Dayao Chen, Bryan J. Hillman +1 more | 2015-07-21 |
| 9086081 | Hydraulic control system having swing motor recovery | Jiao Zhang, Pengfei Ma, Rustu Cesur, Bryan J. Hillman, Peter Spring +3 more | 2015-07-21 |
| 9068575 | Hydraulic control system having swing motor energy recovery | Jiao Zhang, Peter Spring, Pengfei Ma, Randal N. Peterson, Rustu Cesur | 2015-06-30 |
| 8997479 | Hydraulic control system having energy recovery | Gang Wen, Jiao Zhang, Pengfei Ma | 2015-04-07 |
| 8919113 | Hydraulic control system having energy recovery kit | Pengfei Ma, Jiao Zhang, Peter Spring, Dayao Chen, Salik Abdul Syed +2 more | 2014-12-30 |
| 8850806 | Hydraulic control system having swing motor energy recovery | Jiao Zhang, Peter Spring, Pengfei Ma, Randal N. Peterson | 2014-10-07 |
| 8833143 | Hydraulic accumulator pre-charge pressure detection | Dayao Chen, Pengfei Ma, Bryan J. Hillman | 2014-09-16 |
| 8776511 | Energy recovery system having accumulator and variable relief | Jiao Zhang, Dayao Chen, Pengfei Ma, Lawrence J. Tognetti, Jeffrey L. Kuehn | 2014-07-15 |