Hydraulic damper
US4313529A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1979 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Nov 5, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/467
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic damper is provided with a damping force adjusting mechanism. The damper includes a piston slidably positioned with a closed ended cylinder which functions to divide the interior of the cylinder into two chambers. Communication between the two chambers is provided by passageways partially defined by apertures and bores within the piston. Fluid flow between the two chambers via the passageways serves as the damping force. The damping force is made adjustable by a rotary valve positioned within one of the passageways which functions to vary the effective cross-sectional area of that passageway thus functioning as a damping force adjusting element. A device is provided to vary the damping force adjusting mechanism from the exterior of the hydraulic damper in accordance with a predetermined damping force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.