Damping valve for shock absorber
US9410595B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jun 5, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/348
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention obtains damping force in choke characteristics when piston speed is in low-speed region, and reduces damping force when piston speed is in medium-high-speed region. A damping valve for a shock absorber includes a piston partitioning an extension-side chamber from a pressure-side chamber, a returner laminated to pressure-side chamber side of piston, a flow passage penetrating from piston to returner and having entrance constantly communicating with expansion-side chamber, a leaf valve laminated to retainer and operably closing an exit of expansion-side flow passage, a first outer peripheral groove formed on outer periphery of piston rod. A passage T functioning as a choke is formed between first outer peripheral groove and retainer. One side of passage communicates with flow passage and other side thereof communicates with compression-side chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.