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Class Information
Number: 91/392
Name: Motors: expansible chamber type > Working member position responsive motive fluid control
Description: Apparatus in which the flow of motive fluid to or from a working chamber or within a working chamber is modified so as to alter the motor operation in response to the working member of the motor attaining a given position in the working chamber.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7401541 |
Servo-pneumatic actuator |
Jul. 22, 2008 |
| 7353743 |
Multi-valve fluid operated cylinder positioning system |
Apr. 8, 2008 |
| 7347172 |
Hydraulic valve actuation system with valve lash adjustment |
Mar. 25, 2008 |
| 7213549 |
Variable valve actuator |
May. 8, 2007 |
| 7156058 |
Variable valve actuator |
Jan. 2, 2007 |
| 7143682 |
Large manipulator having a vibration damping capacity |
Dec. 5, 2006 |
| 7114430 |
Adaptive position determining system for hydraulic cylinder |
Oct. 3, 2006 |
| 7059126 |
System for preventing swing wag for a work machine with a boom assembly |
Jun. 13, 2006 |
| 6994012 |
Drive units and drive assemblies |
Feb. 7, 2006 |
| 6957603 |
Modulated overpressure valve structure for fluid operated device |
Oct. 25, 2005 |
| 6820355 |
Hydraulic control circuit of boom cylinder in work machine |
Nov. 23, 2004 |
| 6776081 |
Pneumatic actuator system |
Aug. 17, 2004 |
| 6722257 |
Workpiece high-speed pressurizing method and mechanism by using cylinder with cushioning mechanism |
Apr. 20, 2004 |
| 6510688 |
Safety device for a moving system |
Jan. 28, 2003 |
| 6283008 |
Shock-proof hydraulic cylinder |
Sep. 4, 2001 |
| 6082243 |
Fluid controlled switching unit |
Jul. 4, 2000 |
| 5950926 |
Sprayer boom lock valve for sequencing unfolding steps |
Sep. 14, 1999 |
| 5868216 |
Hydraulic rack-and-pinion steering assembly |
Feb. 9, 1999 |
| 5826483 |
Hydraulic heavy equipment |
Oct. 27, 1998 |
| 5595148 |
Hydraulic valve control device |
Jan. 21, 1997 |
| 5572918 |
Multi-functional valve |
Nov. 12, 1996 |
| 5471907 |
Marine steering apparatus |
Dec. 5, 1995 |
| 5349894 |
Locking hydraulic actuator |
Sep. 27, 1994 |
| 5325762 |
Fluid pressure operated piston engine assembly |
Jul. 5, 1994 |
| 5313871 |
Hydraulic control system utilizing a plurality of branch passages with differing flow rates |
May. 24, 1994 |
| 5311808 |
Cylinder apparatus |
May. 17, 1994 |
| 5293809 |
Method of limiting a contact force |
Mar. 15, 1994 |
| 5289756 |
Marine steering apparatus |
Mar. 1, 1994 |
| 5253575 |
Cover driving system |
Oct. 19, 1993 |
| 5220861 |
Actuator with neutral position return |
Jun. 22, 1993 |
| 5136928 |
Service machine stopping apparatus for midget rotary power shovel |
Aug. 11, 1992 |
| 4996906 |
Actuating assembly for hydraulic elevators |
Mar. 5, 1991 |
| 4981426 |
Clamping mechanism in an injection molding machine |
Jan. 1, 1991 |
| 4958548 |
Hydraulic drive mechanism |
Sep. 25, 1990 |
| 4852663 |
Hydraulic percussive machines |
Aug. 1, 1989 |
| 4766802 |
Small-sized engine operated by fluid |
Aug. 30, 1988 |
| 4699223 |
Method and device for percussion earth drilling |
Oct. 13, 1987 |
| 4573348 |
Angular positioning actuator |
Mar. 4, 1986 |
| 4546845 |
Electropneumatic door control |
Oct. 15, 1985 |
| 4541324 |
Vacuum actuator with fail-safe system |
Sep. 17, 1985 |
| 4516472 |
Hydraulically-operated breaking device |
May. 14, 1985 |
| 4498371 |
Direct acting rotary actuator cylinder |
Feb. 12, 1985 |
| 4478131 |
Electro-pneumatic door control apparatus |
Oct. 23, 1984 |
| 4454800 |
Active mechanical hydraulic control apparatus |
Jun. 19, 1984 |
| 4449443 |
Cylinder/piston drive, especially for retightener systems in automatic safety belt winding devices |
May. 22, 1984 |
| 4273028 |
Valves and operating system for expansion machines |
Jun. 16, 1981 |
| 4261616 |
Apparatus for preventing the tipping of dump vehicles |
Apr. 14, 1981 |
| 4227442 |
Cylinder control device of hydraulic cylinder apparatus |
Oct. 14, 1980 |
| 4188858 |
Bumper deterioration warning system for fastener driving tools |
Feb. 19, 1980 |
| 4182126 |
Fork lift hydraulic servo control valve |
Jan. 8, 1980 |
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