Cylinder-and-piston device
US4310148A · kind A · utility
12Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1979 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Nov 14, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/3214
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In the illustrative embodiments of the invention described, a pneumatic cylinder-and-piston device includes a unitary piston structure for providing two different damping rates in dependency on the direction of movement of the piston within the cylinder. Fluid flow across the piston is preferably controlled, to effect the different damping rates, by use of an elastic sleeve which at one end is carried by the piston and which at the other end engages, suitably under fluid pressure, the inner surface of the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.