Seal assembly for annular hydraulic cylinder
US6196552A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2300/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A seal assembly especially suitable for use as the sealing element in the annular cylindrical bore of a concentric cylinder assembly. The seal assembly includes an annular insert structure of rigid material and an annular seal member of elastomeric material bonded to the insert structure. The annular insert structure has an I-beam cross-sectional configuration including an outer annular flange structure centered on an axis, an inner annular flange structure centered on the axis concentrically within the outer annular flange structure, and annular web structure extending radially between the inner and outer annular flange structures. The web structure coacts with the flange structures to define left and right continuous annular grooves in the left and right faces of the insert structure and defines a plurality of circumferentially spaced holes extending axially through the web structure between the left and right grooves. The annular elastomeric seal member fills the left and right grooves, fills the web structure holes, and extends to one side of the insert structure to form inner and outer annular sealing surfaces for coaction with the respective annular surfaces of the annular cy…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.