Hydraulic actuator assembly with integral damper/accumulator
US6352018B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/745
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A novel arrangement of a hydraulic actuator assembly is disclosed. The hydraulic actuator assembly comprises a bi-directional electric motor driving a drive screw. A shaft coupler is threaded onto the drive screw. The shaft coupler is splined to a stationary coupler retainer to prevent rotational movement thereof. The shaft coupler is connected to a hydraulic piston slidably mounted within a pressure chamber by a compression spring. The spring functions both as a damper and as accumulator in a hydraulic system to help stabilize hydraulic pressure. An electrical control system for the hydraulic actuator comprises a high-pressure cutoff switch, a low-pressure cutoff switch, and a control switch. The control switch is adapted for activating the hydraulic actuator assembly and selecting desired operation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.