Hydraulic control apparatus for tractor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 15, 1980
Issued Date -
N/A
app pub date -
Sep 27, 1977
filing date -
Feb 22, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A position control valve provided for controlling a first hydraulic unit is also operable to control a second hydraulic unit. The apparatus comprises the first hydraulic unit for raising and lowering a primary working implement, the second hydraulic unit for raising and lowering a secondary working implement, the control valve for controlling the first hydraulic unit, and a feedback mechanism for returning the control valve to its neutral position for every position of a control lever in operative relation to the upward or downward movement of the primary working implement. A guide plate for the control lever for operating the control valve provides a second operation range for the secondary working implement having a neutral position corresponding to a maximum lift position for the primary working implement. Elastic regulating means is mounted on the guide plate for the second operation range to set the control lever in position. The control lever is automatically and accurately returnable to the neutral position when operated against the elastic means and thereafter released from the hand.
First Claim
Family
International Classification(s)
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