Rod or piston seal with grooved surface
US5507505A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3236
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rod or piston seal with a seal body made of a polymeric material, which contacts the surface that is being sealed and is capable of relative displacement with a sealing surface. The sealing surface is interrupted in the movement direction by at least two grooves, extending in the peripheral direction, that have a spacing between them. The spacing consists of at least one land that extends in the axial direction between the mutually adjacent grooves, such that the ratio A between the width of the land and the width of the grooves in the movement direction is 1:2 to 200:1, the ratio B between the width and depth of the grooves is 10:1 to 1:5, and the depth of the grooves has a value of 1 to 200 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.