Folding frame implement
US6374923B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1998 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | May 21, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B73/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A folding tool bar implement converts from a transversely extending operating configuration to a longitudinally extending transport configuration. The implement includes a rotating rockshaft supported by a wheel assembly at each opposing end thereof. The wheel assembly is formed as a walking beam assembly having an L-shaped member defining perpendicular axes of movement for the wheel assembly. A castering axis is oriented vertically to permit a castering action of the wheel assembly when the rockshaft is rotated into a working configuration. The rotation of the rockshaft re-positions the castering axis to a horizontal orientation when rotated into a transport configuration. A caster lock moves by gravity to lock the wheel assembly from moving about the castering axis when the rockshaft is in the transport configuration. The caster lock includes a latch mounted to the wheel assembly and a pivoted latch tongue mounted on the L-shaped member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.