A hydraulic valve assembly, for use in a hydrostatic transmission, for controlling fluid transfer between a first, a second and a third line, wherein two of the lines define first and second pressure lines, within a closed-loop circuit. The valve assembly comprises: a valve body having ports in communication...http://www.google.es/patents/US6837047?utm_source=gb-gplus-sharePatente US6837047 - Hydraulic devices for smooth operations of hydrostatic transmission
Hydraulic devices for smooth operations of hydrostatic transmission
