Abstract: A boom control valve and a pulsation absorption control valve are provided in the halfway point of a center bypass line. The pulsation absorption control valve is arranged in a position downstream of the boom control valve. The pulsation absorption control valve is switched to a blockade position and a communication position by a pilot pressure from a remote control valve. The pulsation absorption control valve is constituted such that one main line out of a pair of main lines is communicated with or blocked off from an accumulator via one communication line and the other main line is communicated with or blocked off from the side of a tank via the other communication line. The accumulator is operated as a dynamic damper at the traveling of a vehicle. This arrangement enables the construction of the communication line to be simplified, thus improving operability at assembling.

Abstract: A boom control valve and a pulsation absorption control valve are provided in the halfway point of a center bypass line. The pulsation absorption control valve is arranged in a position downstream of the boom control valve. The pulsation absorption control valve is switched to a blockade position and a communication position by a pilot pressure from a remote control valve. The pulsation absorption control valve is constituted such that one main line out of a pair of main lines is communicated with or blocked off from an accumulator via one communication line and the other main line is communicated with or blocked off from the side of a tank via the other communication line. The accumulator is operated as a dynamic damper at the traveling of a vehicle. This arrangement enables the construction of the communication line to be simplified, thus improving operability at assembling.

Abstract: A control valve has a pressure chamber 24 causing a pressure to act on a valve element 21 of a check valve 20, an oil chamber 39 around the valve 21, a slot 40 formed in the valve element 21 and interconnecting the oil chamber 39 and the pressure chamber 24with each other and, a control valve 25 connected directly to a divergence portion 17 and the oil chamber 39 and capable of permitting or cutting off communication between the divergence portion 17 and the oil chamber 39 and changing an opening degree of the communication, an intra-valve-element passage 42, a slot 41 formed in an outer peripheral wall of the valve element 21 and communicating the passage 42 and the chamber 39 with each other, and a spring-return auxiliary check valve 43 for allowing pressure oil to flow from a supply passage 15 into the intra-valve-element passage 42.

Abstract: A pressure selector valve (13) is provided between a hydraulic motor (1) and a directional control valve (5) to connect one of the main conduits (4A), (4B) on a high pressure side to a high pressure conduit (14) while connecting the other of the main conduits on a low pressure side to a low pressure conduit (15). As an inertial body approaches a stop position, a spool valve (16) is switched to an open position (e), bringing a branch passage (14A) of the high pressure conduit (14) into communication with the low pressure conduit. When the pressure difference between the main conduits becomes small, the pressure selector valve is automatically returned to a neutral position to cut off communication between the main conduits, suppressing a reversing movement of the hydraulic motor so that an inertial body can be brought to a stop smoothly.

Abstract: A hydraulic ride control system for a working vehicle such as a wheel loader is provided with boom cylinders, an actuator control valve for controlling a pressure in bottom pressure chambers of the boom cylinders, an accumulator connected to the bottom pressure chambers of the boom cylinders via a connection line, an opening control valve having a pilot chamber to selectively communicating or cutting off the connection line depending on a pressure in the pilot chamber, and a selector unit for selectively feeding a pressure to or draining a pressure from the pilot chamber. The selector unit comprises a controller for variably controlling an opening of the opening control valve.

Abstract: [PROBLEM] To provide a directional control valve assembly, in which a check valve for controlling a flow rate of pressure oil to be guided to a directional control valve as a main valve and a control means for limiting an opening degree of the check valve by a pressure are integrated with the directional control valve and therefore, a flow hardly occurs in the pressure oil that produces the pressure.

Abstract: A pressure selector valve (13) is provided between a hydraulic motor (1) and a directional control valve (5) to connect one of the main conduits (4A), (4B) on a high pressure side to a high pressure conduit (14) while connecting the other of the main conduits on a low pressure side to a low pressure conduit (15). As an inertial body approaches a stop position, a spool valve (16) is switched to an open position (e), bringing a branch passage (14A) of the high pressure conduit (14) into communication with the low pressure conduit. When the pressure difference between the main conduits becomes small, the pressure selector valve is automatically returned to a neutral position to cut off communication between the main conduits, suppressing a reversing movement of the hydraulic motor so that an inertial body can be brought to a stop smoothly.

Abstract: The present invention provides a purchase management system which comprises an AS specific dividing controller 19 for performing control of dividing the purchase request per administrative standard when the AS specifying unit determines that the administrative standards of the respective items to which the purchase request was made differ; an administration controller 21 for receiving the purchase request divided per administrative standard and administratively controlling the purchase request; a divided ordering controller 22 for performing control of dividing and ordering the purchase request per item specific dealer when the administration controller allows the purchase request; and an order totaling controller 23 for totaling the order data ordered by the divided ordering controller according to the attribute of the expense item of the order.

Abstract: A system that executes and manages the purchase of items at low cost is disclosed. This system, based on merchandising of one or more dealers, uses a merchandise assortment (MD) of each dealer specified by a customer's purchase control department for example as a customer specific electronic catalog. Then, this MD/electronic catalog stores for each item the information necessary for specifying its dealer and supplier. A server 10 is equipped with an item specific ordering controller 14 that, when it has received an order issuing request for ordering one ore plural number of items from a terminal of a user who belongs to the customer's purchasing unit, specifies a dealer who offers each item based on the MD information of each said purchasing unit. By this, it becomes possible for each user of the customer to make purchases based on the purchasing standard determined by the purchase control department by only specifying necessary items even without knowing the dealer names.

Abstract: The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member is in a closed state, when the pressure in the inlet chamber is higher, a pressurized medium is introduced to the control pressure chamber via a first valve unit and is cut off from the outlet chamber by a second valve unit. When the pressure in the outlet chamber is higher, the pressurized medium is introduced to the control pressure chamber via the second valve unit and is cut off from the outlet chamber by the first valve unit.

Abstract: A plurality of directional control valves are included in a valve main body 1. Each of the directional control valves is provided with a spool 2, actuator ports 3,4, a communication passage 7, a parallel passage 6, a tandem passage 5, a first check valve 8 for permitting a flow of pressure fluid from the parallel passage 6 toward the communication passage 7, and a second check valve 9 for permitting a flow of pressure fluid from the tandem passage 5 toward the communication passage 7. For example, the first check valve 8 is slidably arranged in the second check valve 9, the second check valve 9 is provided with a through-hole 14 formed in communication with the communication passage 7, and a plug 11 is arranged in threaded engagement with the valve main body 1 such that an end portion of the first check valve 8 and an end portion of the second check valve 9 are covered by the plug 11.

Abstract: A hydraulic ride control system for a working vehicle such as a wheel loader is provided with boom cylinders, an actuator control valve for controlling a pressure in bottom pressure chambers of the boom cylinders, an accumulator connected to the bottom pressure chambers of the boom cylinders via a connection line, an opening control valve having a pilot chamber to selectively communicating or cutting off the connection line depending on a pressure in the pilot chamber, and a selector unit for selectively feeding a pressure to or draining a pressure from the pilot chamber. The selector unit comprises a controller for variably controlling an opening of the opening control valve.

Abstract: The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member is in a closed state, when the pressure in the inlet chamber is higher, a pressurized medium is introduced to the control pressure chamber via a first valve unit and is cut off from the outlet chamber by a second valve unit. When the pressure in the outlet chamber is higher, the pressurized medium is introduced to the control pressure chamber via the second valve unit and is cut off from the outlet chamber by the first valve unit.

Abstract: By supporting distribution related to an overall business dealing among customers CMR, plural distributors including dealers SHP, and suppliers SPR with use of a computer system CS through communication network, the merchandise supplier side including the distributors SHP or WS and suppliers SPR can simplify its own merchandise distribution process and save labor required for tasks due for the merchandise distribution process, while the customer CMR side can simplify the ordering management, ordering operations and the like.

Abstract: A system for executing and managing purchases of items at low cost is disclosed. This system comprises a database 9 which stores various kinds of masters and a server 10 connected to prescribed terminals 1 via a network such as the Internet. When items stored in a merchandise master are to be replaced with items that are replaceable and not contained in a customer specific electronic catalog (MD related information), the server controls the replacement of items provided from the dealers to the customers according to predefined automatic replace levels. Thus changes are made in items according to predetermined contract, and manufacturing suspensions and introduction of new products and the like can be coped with.

Abstract: The present invention provides a purchase management system which comprises an AS specific dividing controller 19 for performing control of dividing the purchase request per administrative standard when the AS specifying unit determines that the administrative standards of the respective items to which the purchase request was made differ; an administration controller 21 for receiving the purchase request divided per administrative standard and administratively controlling the purchase request; a divided ordering controller 22 for performing control of dividing and ordering the purchase request per item specific dealer when the administration controller allows the purchase request; and an order totaling controller 23 for totaling the order data ordered by the divided ordering controller according to the attribute of the expense item of the order.

Abstract: Electronic parts that have axially extending leads are separated from a first strip on which they are supplied for being rearranged and retaped to provide a second strip for supply to an automatic assembly machine. The parts are separated from the first strip by cutting the strip transverse to the strip at locations between adjacent parts. The tape chips remaining on the separated parts are removed by engaging them with movable jigs, located on opposite sides of a body portion of the part, and by moving the jigs along the leads away from the body portion. The jigs are mounted on a rotating rotor and engage grooves in a stationary cam. The jigs move toward and away from each other by the engagement with the grooves as the jigs are moved around the stationary cam. After the parts are separated and the tape chips removed, the parts are transferred to a retaping machine to be attached to the second strip.

Abstract: A fast reaction steering mechanism including a variable ratio gear mechanism connected in series with a speed increasing gear mechanism which is disposed in a steering transmission for transmitting rotation of a steering wheel to a steering gear box, the variable ratio gear mechanism comprising a first gear connected to the steering wheel having an effective radius gradually increasing with an increasing steering angle and a second gear connected to the steering box having an effective radius gradually decreasing with an increasing steering angle, and, with the steering angle at its central position, a smallest-radius portion of the first gear engaging with a largest-radius portion of the second gear, thereby providing a maximum steering angle by a reduced rotation of the steering wheel.

Abstract: A hydraulic control valve which is equipped with two direction change-over valve groups individually having traveling change-over valves, and first and second hydraulic pumps corresponding to those direction change-over valve groups. The traveling section valve of one of the change-over groups is equipped with a communication valve. Each section valve has its valve body formed therethrough with signal conduits individually extending perpendicular to spool bores. The two traveling section valves are formed with annular grooves in spool bores positioned to correspond to said signal conduits. The individual working machine section valves other than the traveling section valves are formed with annular grooves in the spool portions corresponding to the signal conduits to provide the communications between the upstreams and downstreams of the signal conduits only when the spools are in their neutral states.

Abstract: A hydraulic control circuit adequate to control a main hydraulic actuator and auxiliary hydraulic actuators. The main actuator drives farm machinery mounted to an agricultural tractor or the like. The auxiliary actuators drive farm attachments independent of said farm machinery. At least two hydraulic pumps and at least two sets of control valves are connected in series. The exit of one hydraulic pump is connected with the other hydraulic pump via a check valve. Said one hydraulic pump is connected with a tank via an openable valve upstream of the check valve. The upstream set of control valves is used to control the auxiliary hydraulic actuators needing more flow rate than the downstream set of control valves. The openable valve has an offset valve at its one end to determine the direction of flow. The openable valve is either opened or closed by the pressure admitted from the downstream side of the upstream set of control valves.