Folding implement frame

Harvesters – Horse rakes – Rear delivery

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

11161594

ABSTRACT:
A folding frame for a drawn implement such as a hay rake is disclosed. The frame includes cushion fold cylinders, a lift cylinder, and a windrow width cylinder. The lift arms actuated by the lift cylinder lift the frame wings and engage a selector valve, providing an open circuit to either the fold cylinder or the windrow width cylinder, or both. During folding, when the cylinders reach the cushion region of their stroke, the pressure in the hydraulic circuit increases, resulting in a change in the force applied to the selector valve by the lift arm. By careful adjustment, this change in pressure will adjust the selector valve so the hydraulic circuit is open to both the fold and windrow width cylinders. Consequently, the windrow width cylinders extend, keeping the frame wings from colliding with the main frame.

REFERENCES:
patent: 5062260 (1991-11-01), Tonutti
patent: 5493853 (1996-02-01), Tonutti
patent: 5540040 (1996-07-01), Peeters
patent: 5542190 (1996-08-01), Wahls
patent: 5752375 (1998-05-01), Tonutti
patent: 5899055 (1999-05-01), Rowse et al.
patent: 6945024 (2005-09-01), Tonutti
patent: 7007450 (2006-03-01), Tonutti

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Folding implement frame does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Folding implement frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Folding implement frame will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3904133

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.