Lift axle suspension systems incorporating compression coil springs
US8967638B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2013 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Nov 19, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49616
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A lift axle suspension system is provided with a frame bracket member connectable to a vehicle frame, an upper control arm, and a lower control arm. Each control arm has a first end and a second end, with the first end of each control arm being pivotally connected to the frame bracket member. The suspension system also includes an axle connecting member connectable to an axle, with the second end of each control arm being pivotally connected to the axle connecting member. A compression coil spring having a first end connected to the lower control arm and a second end connected to the upper control arm serves as a lift mechanism for lifting and lowering the axle connected to the axle connecting member. The compression coil spring may encircle at least a portion of and be substantially coaxial with the lower control arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.