|
| US4018350 | 17 mars 1975 | 19 avr. 1977 | Pettibone Corporation | Hydraulic cyliner systems with safeguarded float action |
| US4039085 | 10 juin 1976 | 2 août 1977 | Koehring Company | Crane with a pivoted boom and a float valve therefor |
| US4128047 | 14 juil. 1977 | 5 déc. 1978 | Textron Inc. | Actuator with locking valves |
| US4130049 | 7 avr. 1977 | 19 déc. 1978 | Caterpillar Tractor Co. | Vent control for cylinder mounted load check valves |
| US4165675 | 7 avr. 1977 | 28 août 1979 | Caterpillar Tractor Co. | Load check valve cylinder mounted |
| US4167892 | 7 avr. 1977 | 18 sept. 1979 | Caterpillar Tractor Co. | Load check with mechanical venting means |
| US4170246 | 23 mai 1977 | 9 oct. 1979 | Sta-Rite Industries, Inc. | Pilot operator valve |
| US4170279 | 13 avr. 1977 | 9 oct. 1979 | Societe Anonyme Potain Pioclain Materiel (P.P.M.) | Fluid flow control devices |
| US4286432 | 30 août 1979 | 1 sept. 1981 | Caterpillar Tractor Co. | Lock valve with variable length piston and hydraulic system for a work implement using the same |
| US4367673 | 9 janv. 1981 | 11 janv. 1983 | Dresser Industries, Inc. | System and method for controlling the elevation of a boom hoist device |
| US4417502 | 17 nov. 1980 | 29 nov. 1983 | Dresser Industries, Inc. | Load supporting hydraulic circuit with emergency automatic load restraint |
| US4523513 | 27 juin 1983 | 18 juin 1985 | WABCO Westinghouse Fahrzeugbremsen GmbH | Pneumatic door-operating arrangement |
| US4558630 | 27 sept. 1984 | 17 déc. 1985 | Oy Tampella Ab | Hydraulic mechanism with elastically backed piston parts and cooperating valve means |
| US4619187 | 25 oct. 1982 | 28 oct. 1986 | Caterpillar Inc. | Fluid control for two independent actuators |
| US4754693 | 30 mars 1987 | 5 juil. 1988 | Concordia Fluidtechnik GmbH | Valve |
| US4761953 | 24 déc. 1986 | 9 août 1988 | Dynamic Hydraulic Systems, Inc. | Hydraulic elevator mechanism |
| US4761954 | 16 mars 1987 | 9 août 1988 | Dynamic Hydraulic Systems, Inc. | Fork-lift system |
| US4768420 | 3 avr. 1987 | 6 sept. 1988 | | Control arrangement for controlling a hydraulic drive for driving a piston pump |
| US4852660 | 28 oct. 1988 | 1 août 1989 | O & K Orenstein & Koppel Aktiengesellschaft | Grader blade having a pressurized float position |
| US5036750 | 7 juin 1990 | 6 août 1991 | Nippon Air Brake Kabushiki Kaisha | Pilot-operated dual check valve assembly with cross-line flow valving pilot pistons |
| US5235896 | 18 mars 1992 | 17 août 1993 | Hoerbiger Fluidtechnik GmbH | Hydraulic cylinder/piston mechanism |
| US5284083 | 20 nov. 1992 | 8 févr. 1994 | Messier-Bugatti | System for powering the driving actuator of an aircraft undercarriage |
| US5934176 | 30 juil. 1997 | 10 août 1999 | Applied Power Inc. | Hydraulic operating system |
| US5988028 | 7 juil. 1997 | 23 nov. 1999 | Putzmeister Aktiengesellschaft | Process for conveying thick matter containing preshredded scrap metal or similar solids |
| US6131610 | 19 nov. 1997 | 17 oct. 2000 | SMC Kabushiki Kaisha | Speed controller with pilot check valve |
| US6158313 | 8 oct. 1999 | 12 déc. 2000 | Putzmeister Aktiengesellschaft | Process for conveying thick matter containing preshredded scrap metal or similar solids |
| US6293180 | 21 juil. 2000 | 25 sept. 2001 | SMC Kabushiki Kaisha | Speed controller with pilot check valve |
| US6293181 | 21 sept. 1999 | 25 sept. 2001 | Caterpillar Inc. | Control system providing a float condition for a hydraulic cylinder |
| US6296015 | 8 juin 2000 | 2 oct. 2001 | SMC Kabushiki Kaisha | Speed controller with pilot check valve |
| US6997210 | 19 juil. 2002 | 14 févr. 2006 | Aladdin Engineering & Manufacturing, Inc. | Valve arrangement including release valve |
| US7472638 | 14 oct. 2005 | 6 janv. 2009 | Caterpillar Inc. | Hydraulic system with an actuator having independent meter-in meter-out control |
| US7954420 | 9 juil. 2008 | 7 juin 2011 | Sauer-Danfoss Aps | Hydraulic valve arrangement |
| US8001882 | 10 sept. 2008 | 23 août 2011 | Volvo Construction Equipment Holding Sweden AB | Double check valve having floating function |