| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 091418000 |
WITH MOTIVE FLUID VALVE
| 52 |
| 091358000 |
WORKING MEMBER POSITION FEEDBACK TO MOTIVE FLUID CONTROL
| 47 |
| 091472000 |
THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS
| 43 |
| 091508000 |
PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS
| 12 |
| 091392000 |
WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL
| 11 |
| 091218000 |
CYCLICALLY OPERABLE
| 10 |
| 091165000 |
APPLICATION OF MOTIVE FLUID AT DIFFERENT PRESSURES TO OPPOSED WORKING MEMBER FACES | 5 |
| 20090007771 | AIR CYLINDER APPARATUS - An electromagnetic valve, a circuit board on which a control circuit for controlling the electromagnetic valve is mounted, and a cover for covering the electromagnetic valve and the circuit board are installed on a device-attaching surface of an adapter plate disposed at one end in a direction of an axial line of an air cylinder, in a manner so as to be housed within a surface area of the device-attaching surface, and an output port of the electromagnetic valve and a pressure chamber of the air cylinder are allowed to communicate with each other through an air through-hole provided in the adapter plate. | 01-08-2009 |
| 20100224057 | J-ME modular, internally shifting, double acting, linear fluid actuator system - An improved, modular, internally shifting, double acting linear fluid actuator system which is adapted to be driven by liquid, air stream, steam, or gas, (collectively referenced as fluid medium.) The present invention is comprised of three core modules and two attachment mechanisms: a Control Module, two Canister Modules, and Canister Adjustment Plates. The Control Module receives pressurized fluid medium, internally shifts the fluid medium flow into and out of Canister Modules, and exhausts depressurized fluid medium. The Canister Modules perform the work for each actuator application, and are attached to the Control Module by Canister Adjustment Plates at each end of the Control Module, which allows attachment to different diameter canister modules simultaneously. The Canister Modules may operate at different pressures, different volumes, or perform different applications simultaneously. A modified embodiment includes a Control Module compatible with external switching systems while maintaining central fluid control and modular efficiency. | 09-09-2010 |
| 20110239853 | METHOD AND APPARATUS FOR CONTROLLING A FLUID OPERATED ACTUATOR - A positioner ( | 10-06-2011 |
| 20110056368 | ENERGY STORAGE AND GENERATION SYSTEMS AND METHODS USING COUPLED CYLINDER ASSEMBLIES - In various embodiments, pneumatic cylinder assemblies are coupled in series pneumatically, thereby reducing a range of force produced by or acting on the pneumatic cylinder assemblies during expansion or compression of a gas. | 03-10-2011 |
| 20110120296 | ACTUATOR, ACTUATOR CONTROL METHOD, AND ACTUATOR CONTROL PROGRAM - An actuator in which overshooting has been reduced is provided. A cylinder is divided by a piston to provide first and second chambers, and first and second control valves | 05-26-2011 |
| 091001000 |
WITH SIGNAL, INDICATOR OR INSPECTION MEANS | 5 |
| 20090007769 | POSITIONING CONTROL MECHANISM FOR DOUBLE-ACTING AIR CYLINDER - Between an air source and a first pressure chamber of a double-acting main cylinder having a length measurement sensor for measuring an acting position of a piston, a supply solenoid valve is connected; between the first pressure chamber and the atmosphere, an exhaust solenoid valve is connected; and between a second pressure chamber and the air source, a stop solenoid valve is connected. When a target acting position of the piston is inputted into a controller, the controller moves the piston to the target acting position so that a position measured by the length measurement sensor agrees with the target position by on-off controlling the solenoid valves. Upon reaching the target position, the piston is stopped and held in the stopped state by confining air within the pressure chambers. | 01-08-2009 |
| 20080295679 | CONTROLLED MOTION IN A HYDRAULICALLY ACTUATED SYSTEM - A machine configured to prevent unintentional motion in a linkage pivotally connected to a frame may include a first hydraulic actuator connected to the linkage and a second hydraulic actuator connected to the linkage. The machine may include a sensor and an electronic control module in communication with the sensor. The electronic control module may be configured to close a valve of the first hydraulic cylinder and/or cancel an actuation command to one of the first hydraulic actuator and the second hydraulic actuator in response to the electronic control module determining unintentional motion of the linkage has occurred based on the sensor. | 12-04-2008 |
| 20100282068 | SYSTEM FOR DETERMINING THE POSITION OF A PISTON ALONG ITS PATH OF TRAVEL FOR A FLUID-DYNAMIC ACTUATOR | 11-11-2010 |
| 20100282067 | METHOD AND DEVICE FOR INDICATING THE POSITION OF HYDRAULICALLY ACTUATED ARMATURES - Method of indicating the position of a hydraulically actuated armature, comprising an adjust cylinder for actuating the armature, connected by at least one pressure medium line to an adjustment valve through which the pressure medium line can be switched between pressure-causing forward flow and pressure-less backward flow. wherein the flow through the pressure medium line is converted into a number of electric pulses and the number of pulses reflecting the flow is processed in a program in an indicator unit such that the number of pulses occurring in a predetermined adjustment travel when the flow in the pressure medium line is pressure-less is calculated as being the same adjustment travel as when the pressure medium line is switched to be the pressure line. | 11-11-2010 |
| 20110079138 | Actuator and Sensor Assembly - An actuator and sensor assembly comprising respective sensor and actuator housings defining an interior chamber. Clips on the sensor housing engage the actuator housing for coupling the sensor and actuator housings together. The sensor housing includes a wall defining a pocket. A connector with a sensor couples to the sensor housing in a relationship wherein the sensor extends into the sensor housing pocket. A movable piston is located in the interior chamber and a tube thereon defines a receptacle for a magnet located adjacent the pocket. The piston is seated on a flexible diaphragm. An actuator shaft includes one end coupled to the piston and an opposite end coupled to a movable object. A plurality of pins in the actuator housing mount the assembly to a support bracket. The sensor senses changes in the magnetic field in response to changes in the position of the magnet relative to the sensor. | 04-07-2011 |
| 091471000 |
MISCELLANEOUS (E.G., METHODS, ETC.) | 3 |
| 20110048224 | HYDRAULIC PUMP OR HYDRAULIC MOTOR HAVING A ROTATION SPEED SENSOR - The invention relates to a hydraulic pump or hydraulic motor having an orbiting cardan shaft. The hydraulic pump or motor includes a housing having an end cover and a port plate. The cardan shaft is mounted in the housing and extends through the port plate. A rotation speed sensor is fixed to the port plate and includes a sensor probe obtaining its signal from the orbiting cardan shaft. A piston may be in contact with the cardan shaft and moving forward and back due to the orbital motion of the cardan shaft. The sensor probe then obtains its signal from the movement of the piston. | 03-03-2011 |
| 20080216645 | Fluid control system having selective recruitable actuators - A fluid control or actuation system providing selective recruiting of actuators antagonistic to one another to provide variable output power, such as that used to drive a load. The actuators are intended to comprise different sizes, and to be operable with one or more pressure control valves capable of providing displacement of a non-recruited actuator without requiring active input to cause such displacement. Being able to selectively recruit different sized actuators to drive the load, and being able to displace non-recruited without active input, effectively incorporates a gearing function into the fluid control system. | 09-11-2008 |
| 20090255399 | PNEUMATIC MOTOR - A pneumatic motor includes a cylinder, a rotor and a drive shaft. The cylinder includes a cylinder body having two ends, a first cover and a second cover. The first cover is mounted on one of the ends of the cylinder body and has a first bearing housing, a first bearing and a first blocking ring. The first bearing is mounted in the first bearing housing and has an annular clearance. The first blocking ring is mounted between the first bearing housing and the first bearing and covers the annular clearance of the first bearing. The rotor is mounted rotatably in the cylinder body. The drive shaft is mounted securely through the rotor. When compressed air is expelled from the cylinder body, the compressed air does not blow lubricants out of the first bearing because the first blocking ring closes the annular clearance. | 10-15-2009 |
| 091041000 |
WITH CORRELATED CONTROL OF MOTIVE FLUID AND LOCKING MEANS | 3 |
| 20100037762 | VALVE DEVICE AND METHOD FOR THE ACTIVATION OF AN ACTUATING DRIVE ACTED UPON WITH PRESSURE MEDIUM BY A POSITION CONTROLLER - A valve device and method for the activation of an actuating drive, which can be acted upon with a pressure medium by a position controller. The position controller can be acted upon by a working connection of the actuating drive with a pressure medium which can be delivered to the position controller via a feed pressure connection. The valve device includes means for blocking the actuating drive in the event of a failure of the feed pressure. The blocking means includes a pilot-controlled shut-off valve which is arranged in the region of the working connection of the position controller, and a pilot control valve arrangement connected to the feed pressure connection of the position controller to control pressure of the feed pressure connection and cause the pilot-controlled shut-off valve to assume a shut-off position when the feed pressure falls below a defined first limit value. | 02-18-2010 |
| 20100212488 | Hydro-Pneumatic Cylinder with Controlled Stop Position - A cylinder having a hollow cylindrical body with an axially moveable rod disposed therein that is moveable between a rest position and a stop position. The cylindrical body and rod are configured so as to create a main chamber located between a lower surface of the rod and a base of the cylindrical body. And to also create an auxiliary chamber that is connectable to the main chamber via a flow channel in the rod. In one implementation the main chamber is adapted to contain a gaseous fluid and an oily fluid mixture when the rod is in the rest position so that the fluid exerts a first force on the lower surface of the rod to urge the rod toward the rest position. When the rod is in the stop position the main chamber predominately contains only the oily fluid. The auxiliary chamber is in flow communication with the main chamber via the flow channel when the rod is not in the stop position, the first auxiliary chamber, main chamber and flow channel configured to cause at least the gaseous fluid to be located in the main chamber to pass through the flow channel to the auxiliary chamber when the rod is moved in a direction towards the stop position so that at least the gaseous fluid exerts a second force on a surface of the rod, opposite the lower surface of the rod, that acts against the first force. A closure element coupled to a portion of the body base is also provided and adapted to close the flow channel in the rod when the rod is in the stop position. | 08-26-2010 |
| 20080236381 | POSITIONING CONTROL MECHANISM FOR DOUBLE-ACTING AIR CYLINDER - Between an air source and first and second pressure chambers of a double-acting main cylinder having a length measurement sensor for measuring an acting position of a piston, a first supply solenoid valve and a second supply solenoid valve are connected, respectively, while between the first and second pressure chambers and the atmosphere, a first exhaust solenoid valve and a second exhaust solenoid valve are connected, respectively. When a target acting position of the piston is inputted into a controller, the controller moves the piston to the target acting position so that a position measured by the length measurement sensor agrees with the target position by on-off controlling the solenoid valves. Upon reaching the target position, the piston is stopped and held in the stopped state by confining air within the pressure chambers. | 10-02-2008 |
| 091055000 |
COMBINED | 3 |
| 20090007770 | PNEUMATIC CYLINDER FOR PRECISION SERVO TYPE APPLICATIONS - A pneumatic cylinder designed to convert compressed air into mechanical output is disclosed. The pneumatic cylinder includes a piston and rod assembly with supporting components coaxially disposed and arranged to achieve a linear mechanical force in accordance with a differential pressure across the piston. A cylindrical sleeve, secured to end caps on both openings, encircles the piston and rod assembly and helps guide the piston during travel. A conductive coil is coupled to the cylindrical sleeve to provide sensing of a position of the piston. Additionally, a manifold, which serves as a conduit for airflow between each individual cylinder volume and an external air control device, is disposed such that the cylindrical sleeve and end caps are nested, in a concentric manner, within the manifold. A manifold divider assembly is disposed such that a plurality of end channels are isolated from each other. This arrangement results in a dynamic relationship between airflow and differential pressure that is conducive to precision force and motion control. | 01-08-2009 |
| 20100258002 | ELMALEH ENGINE - A hydraulic/magnetic engine, comprising an engine assembly. Crankcase means are affixed within the engine assembly, and crankshaft means are positioned in the crankcase means. Cylinder means comprise at least two first cylinders being encased in the engine assembly and each including a first piston, at least two second pistons, and an electro-magnetic third piston. A hydraulic system has a hydraulic fluid chamber. First electro-magnetic means generates a first electromotive force, wherein switching magnetic polarity between a first and second openings forces a first piston, at least two second pistons, and an electro-magnetic third piston to move upward and downward within their respective cylinders. Thus, rotating the crankshaft means in a predetermined direction after an initial activation of the crankshaft means by applying a short period of an electrical force. The first electro-magnetic means is within the engine assembly. | 10-14-2010 |
| 20100139475 | CUSHIONING SYSTEM FOR PNEUMATIC CYLINDER OF DIFFERENTIAL ENGINE - A cushioning system for a pneumatic cylinder powered differential engine door opening and closing device for use in passenger transportation vehicles wherein the cushioning initiation point can be adjusted. This cushioning initiation point is adjusted through the use of a linearly adjustable slider member within the large cylinder. The slider is linearly adjustable through the use of an adjustment screw located outside of the pneumatic cylinder and allows one to adjust the time and the mode of the opening/closing of power doors, without disassembly of the cylinder, and significantly improve the safety of the passenger. | 06-10-2010 |
| 091047000 |
CONSTANTLY APPLIED MOTIVE FLUID WITH CONTROLLED VENTING | 2 |
| 20110030547 | FLUID DRIVEN RECIPROCATING LINEAR MOTOR - A reciprocating linear motor powered by one directional fluid flow is provided, having small external diameter, optimized for length, with few moving parts and effective seals, low mass and thus low inertia in direction changes. The motor provides reciprocating linear powered motion for use by attached equipment such as a pump, chisel, hammer, valve, or other machine requiring such power. | 02-10-2011 |
| 20090165639 | ACTUATOR AND METHOD FOR PRODUCING MECHANICAL MOTION - A system for producing mechanical motion is provided. The system includes an actuator having a first end, a second end, and a radially expandable bladder assembly extending therebetween, and a source of pressurized fluid external to said actuator. The bladder assembly further includes an inner cavity. In addition, a substantially fixed-volume reservoir positioned within the cavity is provided, wherein the bladder assembly is configured to expand in a radial direction and contract in an axial direction when a volume of fluid is introduced from the reservoir into the inner cavity. | 07-02-2009 |
| 091152000 |
MULTIPLE EXPANSION | 2 |
| 20110232474 | TWO-STAGE SUBMERSIBLE ACTUATORS - The present invention provides an improved two-stage actuator ( | 09-29-2011 |
| 20110214563 | FREE-PISTON COMPRESSED-GAS ENGINE VARIANT AND ENGINE PINION WITH SEVERAL DECOMPRESSION STAGES AND RETURN SPRINGS - The present utility model is a free-piston engine comprising pinions, with various stages, providing excellent efficiency and control. | 09-08-2011 |
| 091061000 |
ROTARY AND RECIPROCATING WORKING MEMBERS | 2 |
| 20090272255 | Vibrator - A linear vibrator having an internal cylindrical bearing surface forming a chamber therein and a fluid inlet to direct a fluid into the chamber with a one piece piston slideable located therein with the piston simultaneously rotatable and axially displaceable therein with the piston including a static port to bias the piston and thereby induce piston oscillation when fluid is introduced into the vibrator. | 11-05-2009 |
| 20090260514 | Apparatus for Compensating and/or Transmitting Forces or Torques and Rotational Movements Between Two Components - An apparatus for compensating and/or transmitting forces/torques and rotational movements between two components, particularly for compensating for vehicle movements, in which at least one joint module is situated between the two components, which joint module converts a translational and/or rotational movement of a piston, to which a pressure medium is applied, into a rotational movement of at least one first rotatable shaft or of a first and a second rotatable shaft. | 10-22-2009 |
| 091006000 |
FLUID SUPPLY THROUGH DIVERSE PATHS TO SINGLE EXPANSIBLE CHAMBER | 2 |
| 20110048222 | PISTON ACTUATOR ASSEMBLY - A piston actuator assembly having includes a piston liner slidably disposed within a housing. A piston is slidably disposed within the piston liner and partially slidably disposed in the valve body. A plurality of pressurized fluid passages communicate with the piston actuator assembly and provide a first flow of hydraulic fluid and a second flow of hydraulic fluid. A plurality of seals maintains separate fluid pressure chambers selectively pressurized to achieve a plurality of actuator positions. A plurality of exhaust passages communicate with the piston actuator assembly providing pressure relief to allow for predictive movement of the piston and piston liner. | 03-03-2011 |
| 20090165638 | Automatic transmission servo - A servo for hydraulically operating a brake band of an automatic transmission includes a housing having a bore engaging portion for engaging an existing servo bore in a case of the automatic transmission and an external portion for positioning externally of the servo bore, the external portion of the housing including an interior bore. The servo also includes a piston disposed in the interior bore of the external portion of the housing for reciprocating movement, the piston being externally remote from the servo bore and having an outer diameter greater than an outer diameter of the servo bore. An actuator rod for engaging and operating the brake band of the automatic transmission is attached to the piston to reciprocate with the piston. The servo connects to existing hydraulic circuits within the servo bore to supply pressurized fluid for operating the servo. | 07-02-2009 |
| 091415000 |
DIFFERENTIAL | 2 |
| 20110005385 | TWO PORT - THREE POSITION ACTUATOR - An hydraulic actuator with a housing having two ports (A, C) that selectively receive pressured fluid to move a piston ( | 01-13-2011 |
| 20100269685 | HYDRAULIC MACHINE, IN PARTICULAR HYDRAULIC MOTOR, WITH A RECIPROCATING MOVEMENT, AND DIFFERENTIAL PISTON FOR SUCH A MACHINE - Hydraulic machine, in particular hydraulic motor, comprising a casing, a differential piston ( | 10-28-2010 |
| 091004000 |
HYDRO-PNEUMATIC | 2 |
| 20090038470 | HYDRO-PNEUMATIC PRESSURE TRANSFORMATION DEVICE AND METHOD FOR OPERATION - Proposed is a hydro-pneumatic pressure transformation device with a working piston ( | 02-12-2009 |
| 20110174151 | PNEUMATIC BRAKE BOOSTER - A tandem-type pneumatic brake booster, in particular for hydraulic vehicle brake systems, having a housing comprising a first and a second housing half shell, the interior of which is divided with the aid of a partition into a front and a rear booster chamber, wherein the partition has a centrally arranged, circular cavity, through which a control housing or a cylindrical control housing extension extends, and the partition rests sealingly against the control housing or the control housing extension by a sealing element, having a first and a second movable wall, which respectively subdivide the front and the rear booster chamber into a first low-pressure chamber and a first working chamber and into a second low-pressure chamber and a second working chamber, having at least one connecting conduit between the first working chamber and the second working chamber in order to equalize the pressure between said two working chambers. | 07-21-2011 |
| 091052000 |
CONSTANTLY OPEN THROTTLED EXHAUST WITH CONTROLLED MOTIVE FLUID SUPPLY | 1 |
| 20120031262 | HYDRAULIC CYLINDER - A hydraulic cylinder includes a piston that defines a driving pressure chamber and a cushion pressure chamber within a cylinder tube, an air chamber defined inside a hollow piston rod, an orifice that leads a working fluid in the cushion pressure chamber into the air chamber when the cushion pressure chamber contracts during an extension operation, a check valve that returns a working fluid in the air chamber to the driving pressure chamber when a differential pressure between the air chamber and the driving pressure chamber rises to or above a predetermined value, and a valve housing that houses the check valve. A throttle gap is defined between an outer peripheral surface of the valve housing and an inner peripheral surface of the piston rod, and a working fluid ejected from the orifice during the extension operation flows into the air chamber through the throttle gap. | 02-09-2012 |
| 091355000 |
CUTOFF AFTER SINGLE COMPLETE CYCLE | 1 |
| 20110011256 | HOOD-LIFTING ACTUATOR WITH DISARMABLE RETURN BRAKING ARRANGEMENT - The triggered stroke actuator comprises a cylinder ( | 01-20-2011 |
| 091005000 |
WORKING MEMBER MOVED BY STORED MOTIVE FLUID CHARGE | 1 |
| 20110214562 | CYLINDER DRIVING APPARATUS USING AIR PRESSURE - It is an aim of the present invention to overcome urgent and pressing global troubles directly associated with the human right to live, such as the energy crisis, the economic crisis, and environmental pollution and the like which cannot be delayed or neglected any longer in order to meet the needs of the times. Further, it is an aim of the present invention to significantly reduce the dependency on a variety of fossil directly associated with global warming. Therefore, the present invention provides a cylinder driving apparatus using air pressure, with maximized energy, characterized in that the use of fossil fuel energy is reduced and the use of clean energy is proposed. The present invention relates to a cylinder diving apparatus in which a plurality of flexible tubes connected to a crankshaft are filled with high pressure air, alternately expand by expansion energy, and are elevated to operate and rotate the crankshaft. Further, the preset invention relates to an apparatus for minimizing friction and eliminating gravitational force which may interfere with the elevating movement, to thereby maximize the efficiency of the conversion of compressed air expansion energy into rotating movement. The present invention achieves a great and active supplement and improvement over Korean Patent Registration No. 0041791 and No. 0210368 granted to the applicant of the present invention, ad proposes an inventive structure of an assistant tube that provides a novel energy source. Conventional apparatus use a variety of fossil fuels as a power source, whereas the present invention eliminates the repeated rise of oil prices ad ends energy problems, enables people to enjoy a stable life and aids in economic development, and provides all mankind with a new environmentally-friendly energy resource to take the place of the innumerable conventional power sources. The cylinder driving apparatus using air pressure according to the present invention comprises: a plurality of flexible tubes arranged in a case to flexibly move via high-pressure air; a connecting rod fixed at each f the flexible tubes, and which penetrates through an upper portion of the case; a crank shaft sequentially coupled to the connecting rod to rotate via the elevating movement of the connecting rod; a high pressure tank for supplying high pressure air to the flexible tubes via an air line; and a valve arranged in each of the flexible tubes to divide the space in the flexible tube into an upper section and a lower section and to open/shut airflow in the upper and lower sections. The valve is shut to block the upper and lower sections from each other when the flexible tubes are filled with high pressure air, and opens when the flexible tubes are elevated to top center. The valve is connected to an assistant tube, the interior of which is equipped with a tensile spring force to keep the assistant tube compressed, to enable compressed air in the flexible tubes to flow to the assistant tube when the valve opens. | 09-08-2011 |
| 091169000 |
SINGLE CHAMBER FORMED BY MUTUALLY RELATIVELY MOVABLE CYLINDER, SLEEVE AND PISTON | 1 |
| 20090165640 | Booster pump and low-temperature-fluid storage tank having the same - A low-temperature-fluid storage tank capable of efficiently increasing the pressure of fluid without heating the fluid is provided. There is provided a booster pump which includes a piston having a piston head and a piston rod and a cylinder having a compression chamber that accommodates the piston head so that a fluid is compressed by one end surface of the piston head. The piston head is provided with a bellows for separating a space adjacent to the piston rod from a space adjacent to the cylinder in the compression chamber. | 07-02-2009 |
| 091059000 |
TORQUE RESPONSIVE MOTIVE FLUID CONTROL | 1 |
| 20110259187 | DIGITAL HYDRAULIC SYSTEM - A method and a pressurized medium system, including: at least one actuator to generate sum forces effective on a load; a working chamber operating by displacement and located in the actuator; a charging circuit of a higher pressure, which is a source of hydraulic power; a charging circuit of a lower pressure, which is a source of hydraulic power; a control circuit, that couples the charging circuit of higher pressure and the charging circuit of lower pressure, in turn, to the working chamber; wherein the working chamber is capable of generating force components that correspond to the pressure of the charging circuit to be coupled to the working chamber, and each force component produces at least one of the sum forces either alone or in combination with the force components produced by the other working chambers of the actuator. | 10-27-2011 |
| 091196000 |
MOVING CYLINDER | 1 |
| 20080216641 | Motor Fluid Drive, Especially for Rotary, Pivotal or Linear Drive Units and Corresponding Method - The invention relates to a drive, especially for rotary, pivotal or linear drive units, comprising a working piston ( | 09-11-2008 |
| 091357000 |
SELECTIVELY USABLE OR POSITIONABLE WORKING MEMBER CONTROLLED VENT IN CHAMBER WALL (402) | 1 |
| 20110239855 | SINGLE EFFECT HYDRAULIC CYLINDER - The invention belongs to the field of single-effect hydraulic cylinders. It relates to a device that makes it possible to limit the pressure in the pressurization chamber of a single-effect cylinder when the rod thereof is in a particular range of longitudinal positions of safety, while respecting the operating safety of the device, that is, in the case that the power supply of the pilot valves of the distributors and of the hydraulic pump is cut, the rod of the cylinder remains in its position if this position does not lie within the safety position range | 10-06-2011 |
| 091170000 |
RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER | 1 |
| 20080250917 | Hydraulic Lift Structure - An object of the invention is to propose a hydraulic lift structure which prevents a malfunction of a hydraulic cylinder or the like and improves a supplying and discharging efficiency of a working fluid. In a hydraulic lift structure formed by arranging a hydraulic cylinder case internally provided with a hydraulic cylinder for moving up and down a working machine (a rotary power tiller) in an upper portion of a transmission case of a working vehicle, an oil reservoir of a working fluid for the hydraulic cylinder is provided in a boundary portion between the transmission case and the hydraulic cylinder case in such a manner as to be isolated from an inner portion of the transmission case. | 10-16-2008 |
