F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
137/94
F15B 13/02 (2006.01) F16H 61/02 (2006.01) F16H 61/06 (2006.01)
Patent
CA 1174560
TRANSMISSION CONTROL SYSTEM WITH IMPROVED MODULATION RATE REGULATING VALVE Abstract of the Disclosure A power shift transmission control system includes a modu- lation control valve connected for regulating the pressure en- gagement of forward and reverse direction-friction devices and including a pressure-regulating spring which is adjusted by means of a pressure boost piston. A feedback conduit conveys fluid pressure from the forward or reverse direction-friction device to the chamber, and the rate at which this pressure is conveyed to the chamber is controlled by an orifice-selector valve which is operative to selectively place various sized orifices in the feedback conduit in response to the speed-selector valve being placed in the various speed positions.
401260
Borden Ladner Gervais Llp
Deere & Company
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