Composite rod wiper
US5288086A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Oct 13, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3208
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A composite rod wiper for an end cap of a hydraulic cylinder is disclosed for wiping the cylindrical exterior surface of an extensible and retractable rod extending through the end cap. The rod wiper includes a wiper ring of a first, hard and wear resistant elastomeric material. The wiper ring has a generally Vee shaped cross-sectional configuration having a radially inner acute wiper lip, an outer leg and an inner leg, each leg extending radially and axially inwardly in a diverging relation from each other from the wiper lip, and a cavity disposed intermediate the inner and outer legs. An energizer ring of a second, softer and more resilient elastomeric material is disposed in the cavity of the wiper ring. The composite rod wiper 10 provides wiper that has a long wear life, while at the same time maintaining the wiper lip in continuous wiping contact with the rod surface at a sufficient radial force level to ensure proper cleaning action throughout its useful life and during all temperature extremes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.