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Class Information
Number: 91/464
Name: Motors: expansible chamber type > With motive fluid valve > For double-acting motor > Means to simultaneously open working chambers to inlet or exhaust
Description: Apparatus in which valve means are provided for concurrently opening the opposed working chambers of the double acting motor to either inlet or exhaust.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7603856 |
Heavy-construction machine |
Oct. 20, 2009 |
| 7472638 |
Hydraulic system with an actuator having independent meter-in meter-out control |
Jan. 6, 2009 |
| 7305914 |
Hydraulic actuator control valve |
Dec. 11, 2007 |
| 7302797 |
Hydraulic system having a post-pressure compensator |
Dec. 4, 2007 |
| 7213612 |
High pressure ball-poppet control valve with flow control |
May. 8, 2007 |
| 7080590 |
Valve arrangement and hydraulic drive |
Jul. 25, 2006 |
| 6997210 |
Valve arrangement including release valve |
Feb. 14, 2006 |
| 6976418 |
Hydraulic system with an actuator having independent meter-in meter-out control |
Dec. 20, 2005 |
| 6915730 |
Spool-type hydraulic directional control valve having reduced cavitation |
Jul. 12, 2005 |
| 6886450 |
Activation device for a piston/cylinder unit which can be inhibited |
May. 3, 2005 |
| 6802242 |
Pneumatic circuit control system |
Oct. 12, 2004 |
| 6691604 |
Hydraulic system with an actuator having independent meter-in meter-out control |
Feb. 17, 2004 |
| 6637461 |
Electrically operated hydraulic actuator with force feedback position sensing |
Oct. 28, 2003 |
| 6477937 |
Valve arrangement including release valve |
Nov. 12, 2002 |
| 6477835 |
Single-motor injection-and-screw drive hybrid actuator |
Nov. 12, 2002 |
| 6457487 |
Hydraulic system with three electrohydraulic valves for controlling fluid flow to a load |
Oct. 1, 2002 |
| 6431207 |
High-pressure ball-poppet control valve |
Aug. 13, 2002 |
| 6431209 |
Multi-pressure ball-poppet control valve |
Aug. 13, 2002 |
| 6408877 |
Directional control valve |
Jun. 25, 2002 |
| 6354185 |
Flow manager module |
Mar. 12, 2002 |
| 6293181 |
Control system providing a float condition for a hydraulic cylinder |
Sep. 25, 2001 |
| 6202536 |
Pneumatic reciprocatory actuator and method of operating it |
Mar. 20, 2001 |
| 6095028 |
Hydraulic unit |
Aug. 1, 2000 |
| 6092454 |
Controlled float circuit for an actuator |
Jul. 25, 2000 |
| 5964406 |
Valve area scheduling in a double acting piston for a hydraulically-actuated fuel injector |
Oct. 12, 1999 |
| 5921279 |
Solenoid operated dual spool control valve |
Jul. 13, 1999 |
| 5918631 |
Ball-poppet pneumatic control valve |
Jul. 6, 1999 |
| 5816131 |
Fluid-controlled actuator assembly |
Oct. 6, 1998 |
| 5765594 |
Hydraulic control valve |
Jun. 16, 1998 |
| 5644967 |
Servo valve arrangement |
Jul. 8, 1997 |
| 5606901 |
Hydraulic circuit for turning purposes |
Mar. 4, 1997 |
| 5586480 |
Pneumatic motor |
Dec. 24, 1996 |
| 5546847 |
Hydraulic cylinder snubbing arrangement |
Aug. 20, 1996 |
| 5391041 |
Hydraulically operated bus ramp mechanism |
Feb. 21, 1995 |
| 5353686 |
Hydraulic circuit for four-position closed-center selector valve controlled by pressure proportional control valve |
Oct. 11, 1994 |
| 5341572 |
Hydraulic pruning tool |
Aug. 30, 1994 |
| 5235896 |
Hydraulic cylinder/piston mechanism |
Aug. 17, 1993 |
| 5211196 |
Proportional seat-type 4-way valve |
May. 18, 1993 |
| 5207059 |
Hydraulic control system having poppet and spool type valves |
May. 4, 1993 |
| 5174189 |
Fluid control apparatus |
Dec. 29, 1992 |
| 5074335 |
Directional control valve having a plurality of switching positions |
Dec. 24, 1991 |
| 5067519 |
Safety valve for fluid systems |
Nov. 26, 1991 |
| 5058484 |
Electrohydraulic control arrangement for controlling a hydraulic drive |
Oct. 22, 1991 |
| 5038825 |
Multiport valve |
Aug. 13, 1991 |
| 5036750 |
Pilot-operated dual check valve assembly with cross-line flow valving pilot pistons |
Aug. 6, 1991 |
| 5034892 |
Apparatus for suppressing vibratory or quaky movements of mobile type crane |
Jul. 23, 1991 |
| 4964273 |
Subplate-mounted control valves in convertible oscillator drive system |
Oct. 23, 1990 |
| 4883092 |
Multi-way control valve apparatus |
Nov. 28, 1989 |
| 4881371 |
Auxiliary coupler pressure relief hydraulic system with pump drive ignition switch relief |
Nov. 21, 1989 |
| 4840031 |
Control system for fluid pressure operated actuator |
Jun. 20, 1989 |
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