| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 091392000 | WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL | 22 |
| 20080216643 | Biased actuator systems - An actuator system including a receiving body defining a mounting bore, a inlet fluid channel, an outlet fluid channel and a connecting channel between the inlet fluid channel and the outlet fluid channel, a valve seat disposed within the connecting channel, and an actuator assembly connected to the receiving body, the actuator assembly including a sealing tip extending into the mounting bore, the sealing tip being adapted to sealingly engage the valve seat. | 09-11-2008 |
| 20080295680 | Hydrostatic Piston Machine with Output Volume Flow in the Circumferential Direction - The invention relates to a hydrostatic piston machine with a cylinder drum which is rotatably mounted in a housing. A plurality of cylinder bores are disposed in the cylinder drum, which bores can be connected via cylinder openings provided in the cylinder drum ( | 12-04-2008 |
| 20090120278 | ELECTROHYDROSTATIC ACTUATOR INCLUDING A FOUR-PORT, DUAL DISPLACEMENT HYDRAULIC PUMP - An electrohydrostatic actuator including an unbalanced area actuator whereby movement of an actuator piston causes a greater change in displacement on a first side of the actuator piston having a first area than on a second side of the actuator piston having a second area. The actuator includes a four-port, dual displacement hydraulic pump having a first pair of ports and a second pair of ports. If an axial piston pump is used, the pistons may be arranged in first and second rings of pistons arranged concentrically about a central axis. The pump has a port plate with a first pair of ports associated with the first ring of pistons and a second pair of ports associated with the second ring of pistons. At least one of the first pair of ports and at least one of the second pair of ports are connected to the first side of the actuator piston. At least one of the first pair of ports is connected to the second side of the actuator piston. At least one of the second pair of ports is connected to a reservoir of hydraulic fluid. | 05-14-2009 |
| 20100083821 | PISTON PUMP FOR A VEHICLE BRAKE SYSTEM - The invention relates to a piston pump for a motor vehicle braking system having a housing section and a piston guided displaceably in the housing section. The invention further has an intake valve having a valve seat arranged on the piston. The valve seat is configured as a circular sealing edge. A spherical valve body of the intake valve seals against the spherical sealing edge. | 04-08-2010 |
| 20100095835 | MOTION CONTROL OF WORK VEHICLE - A method for controlling a boom assembly includes providing a boom assembly having an end effortor. The boom assembly includes an actuator in fluid communication with a flow control valve. A desired coordinate of the end effector of the boom assembly is converted from Cartesian space to actuator space. A deflection error of the end effector based on a measured displacement of the actuator is calculated. A resultant desired coordinate of the end effector is calculated based on the desired coordinate and the deflection error. A control signal for the flow control valve is generated based on the resultant desired coordinate and the measured displacement of the actuator. The control signal is shaped to reduce vibration of the boom assembly. The shaped control signal is transmitted to the flow control valve. | 04-22-2010 |
| 20140130660 | HYDRAULIC SYSTEM THERMAL CONTRACTION COMPENSATION APPARATUS AND METHOD - An apparatus for compensating for fluid contraction in a hydraulic powered telescoping boom may include a monitor determining the elevation angle of the telescoping boom, a supply of hydraulic fluid, and a fluid control responsive to the monitor. The fluid control provides the hydraulic fluid from the supply to a hydraulic cylinder controlling extension of the telescoping boom when the elevation angle exceeds a predetermined threshold angle to compensate for thermal contraction of hydraulic fluid and thus prevent uncommanded boom retraction. A method in accordance with the invention is also disclosed. | 05-15-2014 |
| 20160138621 | Actuator Utilizing Pneumatic Muscles - One example of an actuation system includes a pneumatic muscle connected to a component to be actuated. The system also includes an actuation member connected in series to the pneumatic muscle and valve connected to the pneumatic muscle to control a pressure in the pneumatic muscle. The system also includes a positioning mechanism connected to the component to control a movement of the component and a controller connected to the pneumatic muscle, the valve, and the positioning mechanism, the controller to control actuation of the component by controlling the pressure in the pneumatic muscle. | 05-19-2016 |
| 091394000 | Working member carries part within working chamber which controls port in chamber end wall | 3 |
| 20120247318 | HYDRAULIC ACTUATOR WITH AUTOMATIC PURGING AT THE END OF ITS STROKE - A hydraulic actuator comprising a hollow body ( | 10-04-2012 |
| 091395000 | Part movable with respect to working member | 1 |
| 20110094374 | HYDRAULIC CYLINDER CUSHION DEVICE WITH CHECK RING - A hydraulic cylinder cushion device installed in a hydraulic cylinder provided, in which a rod performs reciprocating movement in a cylinder tube, and which discharges high-pressure hydraulic fluid that is formed in pressure chambers between a piston and a head cover and between the piston and a cover end during a stroke-end operation. The hydraulic cylinder cushion device includes a check ring which is installed in a groove provided on an inner surface of the head cover or the cover end, and moves to one side in the groove so as to close a flow path during rushing into a stroke end while it moves to the other side in the groove so as to open the flow path during an initial operation in the stroke end. | 04-28-2011 |
| 091396000 | Part forms throttle member | 1 |
| 20100077916 | HYDRAULIC CYLINDER WITH CUSHION - A cushioned hydraulic cylinder assembly including a hydraulic cylinder having a reciprocating piston movable between an extended position and a retracted position and a hydraulic fluid port proximate an end thereof for ingress and egress of hydraulic fluid. A cushion member is carried by the piston, wherein the cushion member obstructs hydraulic fluid flow out of the port in the retracted position and is spaced from the port in the extended position. A continuous spiral groove is formed in an outer surface of the cushion member and has a beginning at a first end of the cushion member away from the piston and terminates proximate a second end adjacent the piston. The beginning of the spiral groove has a cross-sectional volume, the cross-sectional volume decreasing toward the second end of the cushion member. The spiral groove gradually reduces hydraulic fluid flow out of the port as the piston moves toward the retracted position. | 04-01-2010 |
| 091399000 | Bypassing between expanding chamber and closed or throttled contracting chamber (e.g., cushioning, etc.) (23) | 2 |
| 20100116125 | Auxiliary force steering device for a vehicle - A power steering device for a vehicle which is disposed in the transmission path between a steering handle and a steerable vehicle wheel, comprises a servo cylinder having two pressure chambers, which are separated by a working piston and are each connected to a pressure supply unit. A valve plunger, which seals a bypass channel between the pressure chambers, is movably disposed on the working piston. Furthermore, an adjustment bushing comprising an adjustment section is disposed in the servo cylinder, the valve plunger being moved against this section upon approaching an axial limit position, thereby opening the bypass channel. The adjustment bushing is clamped into the servo cylinder, yet held displaceably, wherein, on the adjustment bushing, a sealing section is provided, which is to be moved into a sealing position with the working piston so as to interrupt the flow connection between the pressure chambers. | 05-13-2010 |
| 20160053465 | HYDRAULICALLY OPERATED PIVOTAL JOINT AND SWING DAMPING DEVICE - A hydraulically operated pivotal joint for damping a swing motion of a swing damping device, the hydraulically operated pivotal joint comprising a non-pivoting pin, a first inner channel arrangement comprising a first pressure inlet for providing an inlet for a pressure medium, a first braking arrangement arranged to create a braking force for damping the swing motion. Wherein the braking force is provided by the first braking arrangement by means of pressure provided by the pressure medium conducted to the first braking arrangement via the first inner channel arrangement. The first inner channel arrangement comprises a first pressure outlet, wherein the pressure medium is conducted from the first pressure inlet through the non-pivoting pin and through the first braking arrangement to enable conducting of the pressure medium for a second hydraulically operated moving apparatus of the swing damping device. | 02-25-2016 |
| 091403000 | Position controls actuating fluid for valve | 5 |
| 20090078110 | Pneumatic drive system - It is a question of a pneumatic drive system comprising at least one pneumatic drive ( | 03-26-2009 |
| 20090084257 | Hydraulic cylinder having multi-stage snubbing valve - A hydraulic cylinder for use with a machine is disclosed. The hydraulic cylinder including a tube having a first end and a second end and a cap assembly connected to the first end of the tube to close off the first end. The hydraulic cylinder also includes a piston assembly having a piston rod and being movably disposed within the tube to move between the first end and the second end. The hydraulic cylinder further includes a valve plunger connected to the cap assembly and having a first axial bore and a plurality of radially oriented passages. The plurality of radially oriented passages being configured to sequentially restrict fluid flow through the first axial bore as the piston assembly approaches the first end of the tube. | 04-02-2009 |
| 20120055329 | Actuator Device Having An Open/Close Valve - An arrangement in which a valve assembly is provided between the supply air inlet and the magnetic valve that is activated by a position threshold sensor that can be activated by the actuator element and/or a pressure threshold sensor registering the actuating pressure on the magnetic valve and connects the magnetic valve directly to the supply air to increase the availability of the actuator device when the position threshold sensor detects the attaining of a specified operation position of the actuator element or the pressure threshold sensor detects the failure to attain a specified minimum pressure. | 03-08-2012 |
| 20120285318 | Lifting Mechanism - A lifting mechanism is disclosed which is operated hydraulically and is configured to be mounted or used on a mobile working machine. The lifting mechanism or its hydraulics have a relieving pressure limiting valve which can be regulated as a function of the ground profile. For this purpose, a directly or indirectly measuring sensor arrangement is provided. Furthermore, a method is disclosed which serves for regulating a relieving pressure of a lifting mechanism of a mobile working machine. The method has the following steps (i) detection of the ground profile via a sensor arrangement, and (ii) limitation of the relieving pressure of a relieving line by setting an opening pressure of an electronically activatable proportional relieving pressure limiting valve via a control unit as a function of signals from the sensor arrangement. | 11-15-2012 |
| 20130180396 | COMPRESSED GAS MOTOR AND LAVAGE SYSTEM - A compressed-gas motor has a cylindrical inner chamber closed gas-tight at a first base surface, and a piston arranged so as to be movable along the cylinder axis in the cylindrical inner chamber. A first opening feeds a compressed gas into the inner chamber, and a second opening discharges a gas from inside the inner chamber. The openings are arranged in the cylinder casing of the cylindrical inner chamber, wherein the first opening is arranged between the second opening and the closed first base surface. The first opening is closable by a first piston part and the second opening by a second piston part. The compressed-gas motor has a resetting device which exerts a force on the piston in the direction of the first base surface of the cylindrical inner chamber if the second piston part does not completely close the second opening. | 07-18-2013 |
| 091404000 | Exhaust control | 5 |
| 20130145928 | DOOR ACTUATOR COMPRISING MEANS FOR SETTING TO ATMOSPHERIC PRESSURE IN A RAPID MANNER AT THE END OF OPENING THE DOOR - An aircraft door actuator, including:
| 06-13-2013 |
| 091405000 | Throttling (e.g., cushioning, etc.) | 4 |
| 20080289486 | CUSHION RING AND FLUID-PRESSURE CYLINDER - A cushion ring which is used between a rod-side cylinder head and a piston rod of a fluid-pressure cylinder and which is externally fitted on the piston rod to cushion a shock in the vicinity of the farthest extended end of cylinder includes a throttling groove that has a V-shaped cross section. The throttling groove extends from an appropriate position of the cushion ring to a rod-side end part and functions to throttle the flow of a working fluid flowing from a rod-side fluid chamber to an input/output port provided in a rod-side cylinder head. The throttling groove is provided at the outer periphery of the cushion ring. The throttling groove terminates at a rod-side end part with an end guide face that guides the working fluid toward a slantwise outward direction of the cushion ring. | 11-27-2008 |
| 20120255432 | MULTI-STAGE HYDRAULIC CYLINDER ASSEMBLY - A cushion arrangement for smoothing stage changes in an hydraulic cylinder and including at least one compression chamber of variable volume with a movable and/or deformable chamber wall element displaceable by at least one of the pistons when approaching the transition zone between first and second stages of displacement. The compression chamber is operatively connected to a gas volume to be compressed upon displacement of the chamber wall element. | 10-11-2012 |
| 20140109761 | AXIAL PUMP HAVING STRESS REDUCED PORT PLATE - A port plate is disclosed for use with an axial pump. The port plate may have a cylindrical plate member with a head-end face and a piston-end face located opposite the head-end face, at least one inlet port formed within a first half of the plate member and extending from the head-end face through the piston-end face, and at least one outlet port formed within a second half of the plate member and extending from the head-end face through the piston-end face. The port plate may also have at least one timing hole formed within the plate member at a leading end of the at least one outlet port and passing from the head-end face through the piston-end face, and an arcuate spherical groove extending from the at least one timing hole to the at least one outlet port. | 04-24-2014 |
| 20150377262 | MODULAR ACTUATOR WITH SNUBBING ARRANGEMENT - Described is a modular linear actuator for use in an aerospace application, comprising: a piston housing having a closed end and an open end; a piston rod slideable within an interior of the piston housing between an extended position and a compressed position, the piston rod having a first end proximal to the closed end of the piston housing and a second end distal to the closed end of the piston housing; an attachment mechanism for removably attaching a lug end to the closed end of the piston housing, the lug end for attaching the actuator to a first component; an attachment mechanism for removably attaching a rod end to the second end of the piston rod, the rod end for attaching the piston rod to a second component; and, a piston head removably attached to the first end of the piston rod, the piston head for providing a snubbing engagement with the closed end of the piston housing. | 12-31-2015 |
