Shock absorber with compression spring and dust tube
US4235426A · kind A · utility
18Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1979 |
| Grant date | Nov 25, 1980 |
| Priority date | — |
| Expiry date | Apr 11, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G15/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Shock absorber unit with polymeric convoluted compression spring having a variable spring rate is carried by the piston rod above the seal cover of the unit. The lower portion of the compression spring is formed with a series of mounting and stabilizing lips for the attachment of a dust tube encircling and protecting the upper portion of the piston rod. A rigid insert in the inner end of the compression spring prevents the polymeric material from flowing over the end of the shock absorber when the spring is under full compression loads and displacing the dust tube from its mounting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.