Adjustable double-acting damper
US5178240A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1987 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Nov 25, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7877
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A dasphpot damper for acting between two objects subject to move toward and away from one another including a housing including an elongated cavity, a piston mounted within the housing cavity for reciprocating movement therealong and dividing the cavity into two variable-volume, hydraulic fluid chambers, and a network of passages permitting hydraulic fluid to flow between the two variable-volume chambers as the housing and piston move relative to one another in response to relative movements between the two objects utilizes unitary flow control cartridge mounted within the housing and defining a passageway through which hydraulic fluid is forced to flow when passing between the two variable-volume chambers. The flow control cartridge also includes a check valve device associated with the passageway for controllably restricting the flow of hydraulic fluid in one direction through the passageway and for permitting substantially unrestricted flow of hydraulic fluid in the other direction through the passageway. By controlling the flow of hydraulic fluid through the passageway in the one direction, the damping effect of the damper is controlled. The flow control cartridge can be constr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.