F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
138/69.12
F16H 61/00 (2006.01) F16H 63/40 (2006.01)
Patent
CA 1143631
HYDRAULICALLY OPERATED TRANSMISSION CONTROL Abstract of the Disclosure A hydraulically operated control arrangement for a transmis- sion includes a spring-loaded pressure regulating valve which slides into a position to cut off an exit chamber for hydraulic fluid from an input chamber for pressurized hydraulic fluid so as to route the incoming hydraulic fluid exclusively to the transmis- sion for various control and lubricating functions when hydraulic fluid pressure in the input chamber falls below a first threshold value. Hydraulic fluid applied to the input chamber continues to feed a first plurality of functions within the transmission via the input chamber and a second plurality of functions in the transmission via an intermediate chamber disposed between the input and exit chambers and in communication with the pressure regulating valve until such time as the hydraulic fluid pressure at the input chamber drops below a second threshold value so as to permit the pressure regulating valve to cut off the interme- diate chamber from the input chamber. If the hydraulic fluid pressure within the input chamber falls a sufficient amount, the pressure regulating valve engages a contact which completes an electrical circuit to a low hydraulic fluid pressure warning light. A hydraulically operated detent arrangement coupled to the input chamber and which normally holds a power takeoff control lever in an engaged or on position releases the control lever upon loss of hydraulic fluid pressure to allow a power takeoff control valve within the control arrangement and which also re- sponds to the lost hydraulic fluid pressure to move the control lever from the engaged or on position to a disengaged or off position. A highlow control valve which is coupled to a control lever for a planetary section of the transmission and which provides hydraulic fluid from the input chamber to the planetary section when in a high position cooperates with a second valve coupled to the input chamber and sensitive to hydraulic fluid pressure therein to cause the high-low control valve and the associated control lever to be pulled into a low position and thereby cut off the supply of hydraulic fluid to the planetary section when hydraulic fluid pressure within the input chamber drops below a predetermined value.
347857
Borden Ladner Gervais Llp
Deere & Company
LandOfFree
Hydraulically operated transmission control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulically operated transmission control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulically operated transmission control will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-376293