Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 301 - 350 out of 3,193

Document Document Title
WO/2003/025402A1
Method for restricting leakage of hydraulic oil in a rock drilling rig (I). The oil level in the tank (3) is read and stored in a memory each time one switches between drilling and positioning of different components on the drill rig (I)...  
WO/2003/016766A1
A control valve (36, 37, 39, 40) for controlling the flow of fluid to a fluid-operated actuator, in an open condition in use, allows the flow of fluid from a fluid source to the actuator and, in a closed condition, prevents the flow of f...  
WO/2003/011675A1
Back up hydraulic system for providing hydraulic fluid to a steer-by-wire system. The steer-by-wire system comprises a hydraulic steering actuator (21), a hydraulic pump (31) driven by an engine (29), and an electronically controlled val...  
WO/2003/010387A1
The invention relates to a lifting system, especially a ferry wharf having a platform which can be brought into a pre-determined lifting position by means of a hydraulic cylinder or a cable winch. A stop device is associated with the dri...  
WO/2003/008811A2
The invention relates to the architecture of a hydraulic circuit which is associated with actuators (100) such as aircraft brakes. The invention comprises a main hydraulic circuit (C) which is provided with hydraulic components (4,5,101,...  
WO/2003/004194A1
The supply of operating air or oil to a press, shears or like machine is controlled by a pair of spool valves (10,14) connected in a series and each operates a pair of switches (20,22). The switches connect dc current to the solenoids vi...  
WO/2002/101247A1
An hydraulic control arrangement (66) in association with a pipe relining machine Includes fluid pressure supply and return lines (32, 33), a motor controller (80) to control a motor (67) and a radial position controller. The radial posi...  
WO2002018800A3
A discharge valve (150) is provided to open an electrically controlled pilot valve (100) in emergency situations such as during an electrical or hydraulic failure. The discharge valve has a poppet (154) that operates in response to a pre...  
WO/2002/061288A2
The invention relates to a hydraulic actuating system comprising a pump (2) which is connected to the working chambers of at least two double-acting piston-cylinder arrangements (1; 14, 15) by means of hydraulic lines (3, 4), one of said...  
WO2001065120A3
A hydraulic servo motor which includes a plurality of digitally latched poppet valves (42, 44) that control the spool position of a spool valve (20). The poppet valves are controlled by a controller (56) which perfoms a servo routine tha...  
WO/2002/018800A2
A discharge valve (150) is provided to open an electrically controlled pilot valve (100) in emergency situations such as during an electrical or hydraulic failure. The discharge valve has a poppet (154) that operates in response to a pre...  
WO/2002/008613A1
The invention relates to a device for moving heavy covers (10), in particular, doors for the opening and closing of apertures on a vehicle with armour plating (14). The cover (10) is moved by means of a hydraulic drive unit (18), which m...  
WO/2002/001080A1
The invention concerns a hydraulic circuit (17) and a control valve (18) dimensioned to be capable of providing the greater part the control surface (3) actuating, which requires less power than the system maximum performances. Moreover,...  
WO/2001/092651A1
A hydraulic circuit for construction machinery, comprising a hydraulic pilot-operated control valve for controlling an actuator driving a front attachment and a pilot pipeline leading a hydraulic pilot pressure to the control valve havin...  
WO/2001/083992A1
The neutral override circuit of this invention includes a variable displacement pump (12) controlled by a servo (56) fluidly connected to a displacement control (70) that is biased to a neutral position. A charge pump (58) is connected t...  
WO2001012997A3
The invention relates to a hydraulic valve arrangement for operating a hydraulic consumer (80). Said arrangement is connected to a hydraulic pressure source (40) by means of at least one pressure connection (30), to the hydraulic consume...  
WO/2001/071200A1
A device representing a simple means of multiplying the functionality of wiring in point to point control circuits such that fault tolerant, fault reporting circuits can be constructed with less wire. The circuit can employ the wiring on...  
WO2001029433A3
The invention relates to a device for dynamically monitoring pressure differences in at least two pressure pipes (207, 211), preferably in safety valves of pneumatically operated consumers. The inventive device is characterized in that, ...  
WO2001014750A3
The invention relates to a drive (10) for a control valve, comprising a drive force unit (12), a yoke (14) for connecting to a valve (16) in a fixed manner, a drive spindle (18) for transmitting the movement of the drive force unit to th...  
WO/2001/065120A2
A hydraulic servo motor which includes a plurality of digitally latched poppet valves (42, 44) that control the spool position of a spool valve (20). The poppet valves are controlled by a controller (56) which perfoms a servo routine tha...  
WO/2001/064464A1
The invention relates to a hydraulic anti-roll system, in particular for a chassis of a motor vehicle. Said system has a tank for hydraulic fluid and a pump which are connected to front and rear-axle actuators via corresponding hydraulic...  
WO/2001/059307A1
The invention concerns a fluidic system for safety-oriented control, in addition to a fluidic actuator, a local control device for a fluidic system and a software module for a local control device of a fluidic system. The invention also ...  
WO/2001/054960A1
An electro-hydraulic actuator system (10 or 140) includes a hydraulic actuator (27) having a pair of fluid filled chambers (29, 30) and being operable to provide an actuator output (12) as a function of fluid pressures at the chambers. A...  
WO2001029429A3
The invention relates to a safety valve (10) for consumers driven by compressed air, comprising two directional valves (16a, 16b) connected in parallel, each of which can be operated by a pilot valve (26a, 26b) allocated thereto. The two...  
WO/2001/029430A1
A pipe breakage control valve device (100) having an input/output port (1) connected to a bottom port of a hydraulic cylinder (102) and an input/output port (2) connected to one of the actuator ports of a control valve (103) through an a...  
WO/2001/029429A2
The invention relates to a safety valve (10) for consumers driven by compressed air, comprising two directional valves (16a, 16b) connected in parallel, each of which can be operated by a pilot valve (26a, 26b) allocated thereto. The two...  
WO/2001/029433A2
The invention relates to a device for dynamically monitoring pressure differences in at least two pressure pipes (207, 211), preferably in safety valves of pneumatically operated consumers. The inventive device is characterized in that, ...  
WO/2001/014750A2
The invention relates to a drive (10) for a control valve, comprising a drive force unit (12), a yoke (14) for connecting to a valve (16) in a fixed manner, a drive spindle (18) for transmitting the movement of the drive force unit to th...  
WO/2001/012997A2
The invention relates to a hydraulic valve arrangement for operating a hydraulic consumer (80). Said arrangement is connected to a hydraulic pressure source (40) by means of at least one pressure connection (30), to the hydraulic consume...  
WO/2001/012948A1
The invention relates to the emergency actuation of control systems for the shut down and/or isolation of a fluid circuit containing at least one flexible pipe (42, 44, 46). The flexible pipe (42, 44, 46) being connected to at least one ...  
WO/2001/002735A1
The invention relates to a switching device for a machine, especially a digger, comprising at least one supply connection and one useful connection (P, P') in addition to at least one hydraulic accumulator (10). An on-off valve (12) is a...  
WO/2000/071900A1
The invention concerns a hydraulic line connection with a supply connection (2) having a pressure line and a return line, each ending at a connection valve (4, 5), and with a safety valve (8) in a line between the pressure line and a con...  
WO/2000/068610A1
A duplicate two-channel pneumatic control system enables a flow of compressed air to be delivered to a consumer by applying two control signals essentially simultaneously. The system includes a set-up of pneumatic valves (21, 22; 21', 22...  
WO2000018382A3
Hydraulic directional valve including a control piston (main piston, 3) which can be moved against the force of a spring (main spring, 18) by the tappet of a magnet (12) from its first position (closing position) to its second position (...  
WO/2000/034667A1
The invention relates to a directional valve with a movable valve piston (5). Said valve piston separates two pressure chambers (6, 8) in the interior of the valve housing from each other which chambers can be impinged upon by a control ...  
WO/2000/026060A1
The present invention incorporates a fluid pressure sensing switch (18) in fluid communication with a hydraulic fluid outlet (12) of a hydraulic pump (10) driving a platform lift (4). The pressure switch is calibrated to activate at a pu...  
WO/2000/018382A2
Hydraulic directional valve including a control piston (main piston, 3) which can be moved against the force of a spring (main spring, 18) by the tappet of a magnet (12) from its first position (closing position) to its second position (...  
WO/2000/014413A1
A protection device for controlling the motion of a pneumatic actuator (3), comprising at least one elongated cylinder (6) provided with a piston (4), dividing the cylinder (6) into a first chamber (5a) and a second chamber (5b), an actu...  
WO/1999/056053A1
A control system particularly for use with pipeline plugs and other arrangements which are remotely controlled, and which require to be retrievable in the event of a failure, the pipeline plug including an anchoring/sealing means, the co...  
WO1999036714A9
A voting solenoid arrangement (10) is provided which operates in a "2 out of 3" manner to provide relatively high safety, low spurious tripping and a relatively low installation cost, while also enabling on-line testing of each solenoid ...  
WO1999036714A3
A voting solenoid arrangement (10) is provided which operates in a "2 out of 3" manner to provide relatively high safety, low spurious tripping and a relatively low installation cost, while also enabling on-line testing of each solenoid ...  
WO/1999/036714A2
A voting solenoid arrangement (10) is provided which operates in a '2 out of 3' manner to provide relatively high safety, low spurious tripping and a relatively low installation cost, while also enabling on-line testing of each solenoid ...  
WO/1999/011939A1
The invention concerns a protective circuit provided with additional switching function by exciting an electric adjusting component. The excitation signals to said adjusting component (1) are guided, between a first removable plug-type c...  
WO/1999/010672A1
A fail-safe closure system comprises two control valves (122, 124), a piston actuator (126), a solenoid (147) for operating the control valves and an accumulator module (150). Supply pressurized fluid is applied to an opening chamber of ...  
WO/1998/053213A1
The invention relates to an actuation device for a hydraulically controlled actuator (10), specially for the emergency operation thereof, comprising a housing (14) with a fluid container (16) which can be connected to the actuator (10) v...  
WO/1998/052804A1
The invention relates to a hydraulic control device, specially for a fork lift, comprising a hydraulic consumer (55) used to bleed a spring-loaded brake (56), valves (46, 47, 57, 65) to supply pressure medium from a pressure line (11) to...  
WO/1998/045603A1
The invention relates to a hydraulic control device, comprising a directional valve (13), a hydraulic pump (18), and a built-in two-way valve (52) configured as a seat valve. The directional valve (13) is connected to an inlet line (34) ...  
WO/1998/040630A1
The invention relates to a hydraulic unit for feeding and controlling lifts, hydraulic platforms, loading tailboards, gates, etc. driven by means of hydraulic cylinders. Said unit comprises a hydraulic pump (4) driven by a motor (2) via ...  
WO/1998/023866A1
The present invention provides an actuator controlled by an electro-hydraulic servovalve (12) with a failfixed operation upon the loss of electrical power to the servovalve. A lock valve (69) has apertures therethrough with friction pads...  
WO/1998/006946A1
An apparatus for diagnosing failure of hydraulic pumps for a work machine, which apparatus is inexpensive and capable of surely specifying a faulty hydraulic pump or pumps. Pressure sensors (61-64) are provided on lines (30, 40) leading ...  

Matches 301 - 350 out of 3,193