Cylinder lock device for use in structure
US5147018A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 1992 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Feb 27, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H9/028
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulically-operated piston device installed between the frame of a structure and a vibration-resisting element provided separately from the frame varies the rigidity of the frame by changing the condition of connection between the frame and the vibration-resisting element. A valve controls the operation of the piston device and can be adjusted to change the coefficient of damping of the piston device. To obtain maximum rigidity of the frame, the piston is hydraulically locked in place. For maximum flexiblity of the frame, the piston can be hydraulically released from a locked position to move freely. Hydraulic resistance to movement of the piston can be graduated by metering the flow of oil into and out of the piston device. The coefficient of damping is a function of the metered flow of hydraulic fluid in the piston device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.