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Self-closing valve with adjustable activationRelated Patent Categories: Pumps, With Condition Responsive Pumped Fluid Control, Pressure Responsive Relief Or Bypass Valve, Having Additional Relief Or Bypass ValveSelf-closing valve with adjustable activation description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070031266, Self-closing valve with adjustable activation. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The device of the invention is applicable, for example, to the field of water-cleaning machines but offers considerable versatility, so that it can be used in any hydraulic circuit including a positive displacement pump and a device governing a fluid at pressure. [0002] With reference, for example, to water-cleaning machines, over the past few years the market has seen an increase in the performance of these machines, with increases in pressure and flow rate. [0003] These increases cause some difficulties in the manoeuvrability of the water guns dispensing the pressurised fluid. [0004] In the prior art, the hydraulic circuit of a water-cleaning machine includes a pump, preferably positive displacement with pistons, connected downstream through a conduit with a valve, which valve is connected to a pistol for dispensing the pressurised fluid. [0005] This valve is connected through a further by-pass conduit to the pump. In the briefly above-described configuration, when the gun is shut off the valve traps the pressurised fluid between the connection conduit which joins the valve and the gun, zeroing the pressure between valve and pump in the by-pass circuit, as the by-pass discharge is opened. [0006] When the gun opens the flow in the connection conduit between valve and gun is abruptly freed and a reaction force is generated on the gun handle having an opposite direction to the fluid dispensing direction. [0007] The types of valves used in these types of circuit are pressure isolators, which operate with very short reaction times and with usually high reaction forces on opening of the gun. [0008] The main aim of the present invention is to provide a self-closing valve which can be regulated and which is able to reduce the entity of the reaction force during the transitory period of opening a pressurised fluid dispensing device such as, for example, a gun for water-cleaning machines. In this context the term "transitory" is taken to mean the time that passes from the start of dispensing to reaching the working flow-rate of the gun. [0009] A second aim of the present device is to provide an adjustable self-closing valve which includes the possibility of regulating the duration of the transitory period of opening of a pressurised fluid dispensing device such as, for example, a gun for water-cleaning machines. [0010] A further aim of the present device is to provide an adjustable self-closing valve which, by limiting the reaction forces that come into play, enables a greater working life of the mechanical organs that make up the hydraulic circuit, which are no longer subject to sudden shocks. [0011] These aims and advantages and more besides are all attained by the invention as it is characterised in the claims that follow. [0012] Further characteristics and advantages of the present invention will better emerge from the detailed description that follows of a preferred but non-exclusive embodiment of the invention, illustrated purely by way of non-limiting example in the accompanying figures of the drawings, in which: [0013] FIG. 1 is a lateral view in section of the adjustable self-closing valve of the invention in the rest position; [0014] FIG. 2 is a lateral view in section of the adjustable self-closing valve of the invention in the closed position; [0015] FIG. 3 illustrates a first application of the adjustable self-closing valve of the invention mounted in parallel with a traditional control valve of a fluid dispenser device; [0016] FIG. 4 illustrates a first application of the adjustable self-closing valve of the invention mounted in series with a traditional control valve of a fluid dispenser device; [0017] FIG. 5 is a detailed view of a constructional detail of the adjustable self-closing valve. [0018] With reference to the figures of the drawings, 1 denotes in its entirety an adjustable self-closing valve. [0019] The valve 1 exhibits an external body 2 having a predominant direction along an axis X-X. [0020] The external body 2 internally comprises a cavity 3 terminating externally with respect to the external body 2 with an outlet section 4 and an inlet section 5. [0021] The outlet section 4 is preferably oriented along the axis X-X while the inlet section 5 is preferably oriented transversally with respect to the outlet section 4. [0022] A seating 19 is present at the outlet section 4, in which seating 19 an annular striker element 20 is housed, affording a hole 21 which is preferably arranged coaxially to the axis X-X; exiting fluid is channelled through this hole 21. [0023] The seating 19 further exhibits an increase in section 25 housing an annular body 18 located in contact with the striker element 20, which annular body 18 exhibits an internal diameter which is smaller than the external diameter of the striker element 20. [0024] Opposite to the outlet section 4 there is a cap 6 which is connectable to the external body 2 by means of a threaded coupling. Continue reading about Self-closing valve with adjustable activation... Full patent description for Self-closing valve with adjustable activation Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Self-closing valve with adjustable activation patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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