Actuating system for a hatch or similar hinged structure
US6557924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2002 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Apr 22, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/546
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An actuating system, comprising a base part and a moving part, which can be moved by a compressively preloaded piston/cylinder assembly that comprises a cylinder and a piston rod, wherein a piston on the piston rod divides the cylinder into two working chambers, wherein the base part has an externally powered drive device that stands in operative connection with the moving part and functions in opposition to the operating force of the piston/cylinder assembly, wherein a control system monitors the motion of the moving system and detects an obstacle when a parameter representing the motion deviates from a stored parameter by a threshold limit, wherein the actuating system in the unpowered state holds the moving part with the aid of a locking device, wherein the locking device is formed by a flow connection between the working chambers of the piston/cylinder assembly and a pilot valve for controllably blocking fluid flow through the flow connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.