Vehicle suspension lock system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Oct 28, 1988
filing date -
Oct 28, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vehicle suspension lock system for a tree feller-buncher comprising a pair of pivot arms extending transversely from a vehicle frame. Track pods are mounted on the outer end of each pivot arm and a hydraulic cylinder is extensibly disposed between the frame and the pivot arm. A pilot-operated check valve in each cylinder prevents upward movement of the rod in its associated cylinder when the check valve is closed. The pilot port of each check valve is pressurized responsive to hydraulic fluid pressure used to drive the vehicle track pods thereby permitting fluid flow into and between the cylinders when the vehicle is moving and checking the flow from each cylinder when the vehicle is stationary to effect locking of the pivot arms for logging operations.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully