Self-propelled windrower tailwheel non-zero caster for stability
US9168784B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Apr 16, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B33/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A non-zero caster angle for the rear axle swivel caster wheels on a self-propelled agricultural harvesting machine wherein steering is accomplished by varying speed and/or direction of forward drive wheels. The non-zero caster angle may be fixed or an adjuster mechanism may be provided to allow adjustment within a range of caster angles. The adjuster mechanism incorporates a fixed portion connected to the tractor frame and a pair of rotating portions, one connected to each caster wheel which allows rotation of the caster axis in a plane parallel to the machine longitudinal axis. Also disclosed is an actuator mechanism for providing powered adjustment of the caster angle, even including a control system for active caster angle adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.