Valve (1) for controlling the oil flow to a cylinder (10) provided with single hydraulic connection on one side only, the valve comprising a pneumatic drive group (9) configured to axially move a shutter (5) in the valve chamber in at least three different positions including a neutral position, a tilting position and a lowering position; the valve comprising a limiting device (15) that can be activated when the drive unit is in the tilting position; once activated, said limiting device (15) sets the pressurized chamber (C1) of the drive unit and stops the pneumatic supply to the valve shutter.
F15B 9/10 - Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which the controlling element and the servomotor each controls a separate member, these members influencing different fluid passages or the same passage
B60P 1/16 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element actuated by fluid-operated mechanisms
F15B 9/08 - Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
2.
DIRECTIONAL CONTROL VALVE GROUP,FIXABLE TO A WALL OF AN OIL TANK AT AN OIL INLET THROUGH-HOLE MADE IN THE WALL OF AN OIL TANK.
A directional control valve group (3), fixable to a wall of an oil tank (13) at an oil inlet through-hole (22) made in the wall (12) of the oil tank (13), comprising: a directional control valve (4) provided with a first hollow body (21); a housing (5) of the oil filter element (9); a second hollow body (15). The first hollow body (21) has a first planar surface (51), the second hollow body (15) has a second planar surface (52); the first hollow body (21) and the second hollow body (15) are mutually conformed so as to enable fixing the first hollow body (21) to the second hollow body (15) in such a way that the first planar surface (51) contacts the second planar surface (52) and the first hollow body (21) projects with respect to the second hollow body (15). Additionally, the group (3) comprises a housing of an air filter element (29) inserted in the second chamber (17) of the second hollow body (15) and connectable to the oil tank (13).
An air and oil filter group, couplable to a wall of an oil tank (13) at a through- hole for oil inlet (22) made in a same wall (12) as the oil tank (13), comprises; a housing (5) for an oil filter element (9) which is insertable in the oil inlet through-hole (22); a housing (28) of an air filter element (29); a hollow body (15) which is fixable to the wall (12) of the oil tank (13) at the oil inlet through- hole (22) and which is provided with a chamber (17), a first conduit connectable to the housing (5) of the oil filter element (9), a second conduit which is facing the first conduit and which enables accessing the oil filter element (9), a third conduit connectable to an oil supply and a fourth conduit; a bypass conduit (40) for placing the fourth conduit (39) in fluid communication with the chamber (14) of the oil tank (13). The hollow body (15) and the housing (28) of the air filter element (29) are dimensioned with respect to one another so that: the housing (28) of the air filter element (29) can be inserted in and extracted from the chamber (17) of the hollow body (15) through the second conduit (18); when the housing (28) of the air filter element (29) is inserted in the chamber (17) of the hollow body (15), the air can flow from outside through the second conduit, the air filter element (29), the fourth conduit and the chamber (14) of the oil tank (13).
B01D 36/00 - Filter circuits or combinations of filters with other separating devices
B01D 29/21 - Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
B01D 29/58 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
4.
A DIRECTIONAL CONTROL VALVE GROUP INSTALLABLE ON A TRUCK FOR COMMANDING A DOUBLE-ACTING HYDRAULIC USER, AND A HYDRAULIC PLANT COMPRISING THE DIRECTIONAL CONTROL VALVE GROUP.
The invention relates to a directional control valve group (27), installable on a truck for commanding a double-acting hydraulic user (25), comprising: a directional control valve group (34) that comprises a stem (35) that is mobile between three positions (I, II, III), and six internal conduits (41, 42, 43, 44, 45, 46); a maximum pressure valve (47); a flow regulating valve (50). A hydraulic plant for commanding a double-acting hydraulic user is also disclosed, for commanding a single-acting hydraulic user, which comprises: the directional control valve group (27); an oil discharge (T); a hydraulic pump (P); a second directional control valve group (56) for commanding a single- acting hydraulic user (20), comprising in turn a second directional control valve (57); wherein the second directional control valve (56) is arranged downstream of the hydraulic section (55) with respect to the oil supply direction.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Power take offs; Pumps, Cylinders and Valves; Hydraulic pumps, cylinders and valves; Hydraulic power units and distributors. Power take-offs for industrial vehicles, pumps, cylinders and valves for industrial vehicles; Hydraulic pumps, cylinders and valves for industrial vehicles; Hydraulic and mechanical units for industrial vehicles.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Power take offs; Pumps, Cylinders and Valves; Hydraulic pumps, cylinders and valves; Hydraulic power units and distributors. Power take-offs for industrial vehicles, pumps, cylinders and valves for industrial vehicles; Hydraulic pumps, cylinders and valves for industrial vehicles; Hydraulic and mechanical units for industrial vehicles.
The control system for a hydraulically-actuated device (9) comprises, in known ways, an engine (8) designed to rotate a hydraulic pump (40) on a delivery of which there is a hydraulic distributor (5) able to modulate the supply flow rate (PA) of the device (9); the control system comprises, in a novel way, an electronic control unit (6) designed to compare a signal (SD) coming from the hydraulic device (5), proportional to the supply flow rate (PA), with a signal (NG) coming from the pump (40), proportional to the rotation velocity of the pump (40) and indicating the delivery flow rate (PM), such as to provide in output a signal (SC) which is proportional to the difference between the supply flow rate (PA) and the delivery flow rate (PM), and which is able to actuate the engine (8) in order to annul the difference.
F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
F15B 21/08 - Servomotor systems incorporating electrically- operated control means
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
The power take-off (10) applied on industrial vehicles eliminates noisiness generated by play between cogs of transmission cogwheels (14,19) when the p.t.o. is functioning non-operatively. Thanks to a special geometry of the cog directions of the cogwheels (19, 14) in the transmission gearings, play between cogs is eliminated when there is no power transmission. The play is re-established when the p.t.o. is functioning operatively, by overcoming elastic (21) means acting axially on the gearings (14), and by thus returning the gearings (14) into a normal operative position.
The power take-off (10) applied on industrial vehicles eliminates noisiness generated by play between cogs of transmission cogwheels (14, 19) when the p.t.o is functioning non-operatively. Thanks to a special geometry of the cog directions of the cogwheels (19, 14) in the transmission gearings, play between cogs is eliminated when there is no power transmission. The play is re-established when the p.t.o. is functioning operatively, by overcoming elastic (21) means acting axially on the gearings (14) , and by thus returning the gearings (14) into a normal operative position.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Machines and machine tools; motors and engines (except for
land vehicles); machine coupling and transmission components
(except for land vehicles); agricultural implements other
than hand-operated; incubators for eggs. Vehicles; apparatus for locomotion by land, air or water.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Machines and machine tools for the cutting and forming of materials; electric motors for machines, engines not for land vehicles; machine couplings, transmission components, namely, gear speed reducers, and gear speed multipliers for industrial and farm machinery; agricultural implements other than hand-operated, namely, plows, harrows, disk harrows, mowers, reapers, harvesters, hay rakes, hay balers, broadcast seeders, manure spreaders, fertilizer distributors, corn huskers and rollers; incubators for eggs Land vehicles; apparatus for locomotion by land, air or water, namely, tractors, boats and aircraft
37 - Construction and mining; installation and repair services
Goods & Services
Machines and machines tools, cylinders. Apparatus for heating, refrigerating, ventilating, water supply and drying. Construction, repair, installation.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
(1) Hydraulic pumps for industrial vehicles namely: power take offs and gear pumps, axial piston pumps, bent axis piston pumps, complete hydraulic kits and split shaft power take offs for oleodinamic appliances; transmission assemblies for industrial vehicles namely: hydraulic control units, accessories for industrial vehicles namely oil filters for tanks, pipelines, all this hydraulic components for industrial vehicles; valves distributors, valves and hydraulic circuits for industrial vehicles (except for land vehicles); machine coupling and transmission components.
(2) Transmission assemblies for industrial vehicles namely: power take off, accessories for industrial vehicles namely oil tanks, support brackets kits for tanks, all this hydraulic components for industrial vehicles.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); incubators for eggs; agricultural implements other than hand-operated. Vehicles; apparatus for locomotion by land, air or water.
09 - Scientific and electric apparatus and instruments
Goods & Services
(1) Hydraulic pumps for industrial vehicles, PTOs (power take offs) and transmission assemblies for industrial vehicles, valves and hydraulic circuits for industrial vehicles.
