F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/41.15, 138/4
F15B 21/04 (2006.01) F16H 39/02 (2006.01) F16H 61/46 (2006.01)
Patent
CA 1120377
ABSTRACT A lubrication circuit and a charge circuit for supplying fluid under pressure to a transmission having hydraulic components of a hydrostatic unit with a variable displacement component having a hydraulic displacement control, includes first and second pumps connected in series, with the first pump having a larger volume than the second pump to provide fluid to the second pump and to a lubricating circuit. A fluid line connects between the charge circuit and the lubrication circuit and has a lubrication priority valve therein which operates to provide fluid flow from the charge circuit to the lubrication circuit when required to maintain pressure in the lubrication circuit. Additionally, the charge circuit has a pair of branch lines, with one branch line having a charge priority valve therein which functions to control the flow through the one branch line leading to the hydraulic displacement control for the hydrostatic unit and to thus provide pressure control in the other branch line. The charge priority valve additionally controls the pressure in said one branch line by modulating flow thereof relative to a drain port and also has provision for increasing pressure in the other branch line when the speed of the hydrostatic unit exceeds the overspeed rating thereof.
322337
Reynolds David W.
Schmidt Michael R.
George H. Riches And Associates
Sundstrand Corporation
LandOfFree
Transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-24830