Elastomer damper for an actuator cylinder
US6186484A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Nov 20, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/58
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The elastomer dampers are disposed at both ends of the actuator cylinder in order to stop the piston moving in the cylinder at its stroke ends. The elastomer damper includes a pair of the protruding portions which abut the piston at its stroke end. The protruding portion has an tapered shape in which the cross sectional area thereof gradually decreases from the base to the top. Therefore, when the piston abuts the protruding portions and compresses the protruding portions, the braking force exerting on the piston gradually increases without sudden change. Therefore, the piston decelerates smoothly at its stroke ends. Further, since the top surface of the protruding portion is formed as a flat plane and the top surface is connected to the tapered side surface of the protruding portion by a round surface, no stress concentration occurs at this portion. Therefore, cracks or breakage of the material do not occur in the top surface even after a long operating time of the actuating cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.