Piston for a pneumatic, hydraulic, or hydropneumatic installation
US4438833A · kind A · utility
11Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1981 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Sep 28, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/344
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A piston for a pneumatic, hydraulic or hydropneumatic fluid-filled cylinder includes a constantly open throttled passage therethrough comprised by at least one spiral-shaped throttled channel extending in a plane perpendicular to the piston axis. The spiral configuration of the throttled channel permits the use of a relatively large flow cross section in the channel, thereby preventing clogging of the throttling passage by contaminants entrained in the damping medium, while still providing the desired damping effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.