Rolling-lobe air spring
US6412758B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Jun 1, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2206/424
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rolling-lobe air spring (2) has a flexible member (4), a cover plate (6) and roll-off piston (8). The bead (12) at the piston end is configured so that a contact of the bent-over edge portion (30) with the resilient member (4) takes place as late as possible to avoid an escape of the bead (12) downwardly into the free space. This is done to facilitate the attachment of a bead (12) of the flexible member at the piston end with a bent-over edge portion (30). The gap formed by bending over the edge portion when catching the bead (12) should already be closed so far that the bead (12) can no longer slip out. The bead (12) when grasped, should lie in a clamping manner against the inner surface of the contact wall. For the above purpose, the bead (12) of the flexible member (4) at the piston end is so formed thereon by vulcanization that its sealing surface (14) does not lie horizontally; instead, the sealing surface (14) is tilted at an angle (&agr;) of preferably 45° to 65° to the perpendicular (18) standing on the longitudinal axis (16) of the flexible member. When the bent-over operation is completed, the bead (12) at the piston end comes to lie in a 90° position to the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.