|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||060/405; 060/430; 060/468|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 3 인용 특허 : 25|
A backup system is provided that has a local electric motor and pump for some or all of hydraulic actuators. A local backup hydraulic actuator has two power sources, hydraulic as primary and electrical as backup. During normal operation, the hydraulic actuator receives pressurized fluid from a hydraulic system and the fluid flow to the chambers is controlled by a servo valve. If the hydraulic system fails, the electronic controller detects the failure by observing the signal indicative of the pressure from the pressure sensor, and the controller powers t...
1. A hydraulic control system comprising: a hydraulic actuator having a cylinder and piston assembly;first and second fluid lines coupled to the hydraulic actuator;a high pressure fluid line;a low pressure fluid line;a central pressure source coupled to the high pressure fluid line to place high pressure on the first and second fluid lines;a servo valve positioned between the central pressure source and the hydraulic actuator and being controllable to selectively connect the first and second fluid lines to the high pressure fluid line and the low pressur...