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Class Information
Number: 91/448
Name: Motors: expansible chamber type > With motive fluid valve > Relatively movable serial valves > In supply path
Description: Apparatus in which the serially arranged valves are located in the fluid line supplying motive fluid to the motor.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8505581 Pressure compensated electromagnetic proportional directional flow control valve Aug. 13, 2013
8347617 Hydralic two-circuit system and interconnecting valve system Jan. 8, 2013
8251189 Railway brake cylinder Aug. 28, 2012
8118256 Brake shutoff valve test Feb. 21, 2012
8100145 LIFD valve assembly Jan. 24, 2012
8065037 Control method and system for hydraulic machines employing a dynamic joint motion model Nov. 22, 2011
8047121 Working machine, and quick load-dropping method Nov. 1, 2011
7874241 Electronically controllable and testable turbine trip system Jan. 25, 2011
7789011 Method for operation of a selector cylinder of an electro-pneumatic selector unit for a motor vehicle gearbox Sep. 7, 2010
7665579 Flow control valve having pressure compensating valve Feb. 23, 2010
7438086 Dynamic fluid power monitoring system for separate actuators Oct. 21, 2008
7353744 Hydraulic control Apr. 8, 2008
7228782 Boom-holding control device for use in heavy construction equipments Jun. 12, 2007
7207175 Hydraulic control device for controlling a boom-arm combined operation in an excavator Apr. 24, 2007
7140179 Valve Nov. 28, 2006
7080591 Non-symmetrical seal plate and valve housing Jul. 25, 2006
6973866 Hydraulic circuit for option tool of heavy equipment Dec. 13, 2005
6971302 Hydraulic circuit for heavy equipment option apparatus using boom confluence spool Dec. 6, 2005
6945335 Oil-pressure controlling device for earthmoving machine Sep. 20, 2005
6910493 Control apparatus, method and diagnostic for hydraulic fill and drain Jun. 28, 2005
RE38355 Electrohydraulic control device for double-acting consumer Dec. 23, 2003
6606940 Calender Aug. 19, 2003
6568499 Power steering system for vehicles May. 27, 2003
6564547 Device for digital hydraulic pressure transformation (DHPT) May. 20, 2003
6481506 Dual tilt control system for work vehicle Nov. 19, 2002
6457487 Hydraulic system with three electrohydraulic valves for controlling fluid flow to a load Oct. 1, 2002
6430922 Construction machine Aug. 13, 2002
6250202 Hydraulic control device Jun. 26, 2001
6240353 Industrial vehicle May. 29, 2001
6026730 Flow control apparatus in a hydraulic circuit Feb. 22, 2000
5996623 Hydraulic directional-control valve Dec. 7, 1999
5950426 Hydraulic circuit for hydraulic machine Sep. 14, 1999
5931078 Hydrostatic drive system Aug. 3, 1999
5878647 Pilot solenoid control valve and hydraulic control system using same Mar. 9, 1999
5819634 Universal hydraulic valve Oct. 13, 1998
5813309 Pressure compensation valve unit and pressure oil supply system utilizing same Sep. 29, 1998
5813310 Working machine fall preventive valve apparatus Sep. 29, 1998
5799485 Electrohydraulic control device for double-acting consumer Sep. 1, 1998
5794505 Positioning drive, in particular for a machine tool Aug. 18, 1998
5775198 Control system for a limited stall load activator Jul. 7, 1998
5775199 Rotary valve and directional valve combination Jul. 7, 1998
5746109 Hydraulic system for controlling a mower unit through a raising and lowering mechanism May. 5, 1998
5740988 Axisymmetric vectoring nozzle actuating system having multiple power control circuits Apr. 21, 1998
5718304 Four-wheel steering system for vehicle Feb. 17, 1998
5701795 Hydraulic system Dec. 30, 1997
5680762 Hydraulic circuit controlling an actuator Oct. 28, 1997
5673558 Hydraulic circuit system for hydraulic excavator Oct. 7, 1997
5640892 Hydraulic control device Jun. 24, 1997
5636652 Valve for a hydraulic elevator Jun. 10, 1997
5588463 Module for controlling pressure in a hydraulic circuit Dec. 31, 1996

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