Shock absorber
US9777790B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 29, 2014 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Oct 29, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2238/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shock absorber including a piston (3) slidably fitted in a cylinder having hydraulic oil sealed therein. A flow of hydraulic oil, induced in a passage (10) and a sub-passage (29) by sliding movement of the piston in the cylinder in response to the stroke of a piston rod, is controlled by an extension main valve (14) and a compression sub-valve (15) incorporated in the extension main valve, thereby generating a damping force. The amount of deflection of a sub-disk (30) constituting the compression sub-valve when the sub-disk is opened is limited by restricting portions (21). The sub-disk is provided with communicating holes (31) to reduce a differential pressure acting on the sub-disk when opened and also to relax the concentration of stress in the sub-disk, thereby improving the durability of the sub-disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.