| 发明名称 | Closed-loop hydraulic system having energy recovery | ||
| 摘要 | A hydraulic system is disclosed. The hydraulic system may have a pump with variable-displacement, a first linear actuator, and a second linear actuator coupled to the first linear actuator to operate in tandem. The first and second linear actuators may be connected to the pump in closed-loop manner, and each of the first and second linear actuators may have a first chamber and a second chamber separated by a piston. The hydraulic system may also have an accumulator in fluid communication with the second chamber of only the second linear actuator. | ||
| 申请公布号 | US9151018(B2) | 申请公布日期 | 2015.10.06 |
| 申请号 | US201113250002 | 申请日期 | 2011.09.30 |
| 申请人 | Caterpillar Inc. | 发明人 | Knussman Michael L. |
| 分类号 | F16D31/02;F15B13/04;E02F9/22;F15B11/16;F15B15/14 | 主分类号 | F16D31/02 |
| 代理机构 | Finnegan, Henderson, Farabow, Garrett & Dunner, LLP | 代理人 | Finnegan, Henderson, Farabow, Garrett & Dunner, LLP |
| 主权项 | 1. A hydraulic system, comprising: a pump having variable-displacement; a first linear actuator and a second linear actuator coupled to operate in tandem and connected to the pump in closed-loop manner, each of the first and second linear actuators having a first chamber and a second chamber separated by a piston; an accumulator in fluid communication with the second chamber of only the second linear actuator; an inlet passage connected to the pump; a discharge passage connected to the pump; a first valve disposed between the inlet passage and the first chambers of the first and second linear actuators; a second valve disposed between the inlet passage and the second chamber of the first linear actuator; a third valve disposed between the discharge passage and the first chambers of the first and second linear actuators; and a fourth valve disposed between the discharge passage and the second chamber of the first linear actuator. | ||
| 地址 | Peoria IL US | ||