Molded piston for a hydraulic damper
US5070971A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Apr 23, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/3214
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A molded piston for a shock absorber is formed as a cylindrical member having a central, axial opening for receiving a piston rod. A plurality of unrestricted axial openings are provided in the piston radially outbound of the central opening and aligned substantially parallel to the axis of the piston to serve as primary flow passages. A plurality of axial grooves are provided on the circumference of the piston to serve as secondary flow passages. A flexible, circumferential valving ring is integrally molded at one end of the piston for permitting only one-way flow of fluid through the secondary flow passages as the piston reciprocates in an inner cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.