Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1992-01-15
1993-05-25
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13750538, 137509, 13761414, G05D 1610
Patent
active
052131327
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The subject of the present invention is an automatic regulating valve for pressurized fluid, comprising a valve body comprising a chamber having a cylindrical bore, at least one lateral inlet orifice for the fluid, at least one frontal outlet orifice and at least one orifice bringing into permanent communication the bottom of the cylindrical bore and of the chamber with the outside, a shutter constituted by a body of revolution which is axially movable in said chamber and a cylindrical portion of which, engaged in the cylindrical bore of the chamber, is provided with a sealing ring, and a spring working in compression between the shutter and the bottom of the cylindrical bore in order to maintain the shutter closed, the inlet orifice emerging between said seal and the outlet orifice, the valve furthermore being arranged such that the passage cross-section between the shutter and the wall of the chamber decreases when the shutter moves back under the effect of the pressure of the fluid.
PRIOR ART
Such valves are already known from the International Patent Application WO 86/04163. In one of these valves, the shutter is constituted by a first piston provided with a ring and connected via a rod to a second piston which is also provided with a ring. The chamber has to have an accurate bore which is relatively long and tricky to produce, in particular when the valve is produced from injected synthetic material. In the other valve, the shutter also has a piston rod integral with a piston provided with an O-ring. The bore is substantially shorter, but the chamber is constituted by several portions. Furthermore, in the two valves, the passage of the fluid is performed through a longitudinal slot made in the wall of the bore, below the O-ring seal of one of the pistons. Of course, this slot requires special means for obtaining it.
The object of the present invention is to produce a valve of simpler manufacture and, consequently, of a lower cost price, the cost price being an essential factor in the case of mass manufacture.
SUMMARY OF THE INVENTION
In the valve according to the invention, the chamber has a frustoconical portion into which the inlet orifice emerges and the shutter has, in front of the cylindrical portion provided with said ring, a frustoconical portion similar to that of the chamber and at least one passage between this frustoconical portion and the front of the shutter, the length of the frustoconical portion of the shutter being such that, in the closed position, a space remains between the frustoconical surfaces of the shutter and the chamber.
The shutter has a simple shape, particularly if the passages are constituted by simple grooves or flats. The chamber does not comprise slots. Only the frustoconical portions have to be produced accurately. The shutter may be very short or provided with a rod whose end engages with a valve seat surrounding the outlet orifice. The latter construction lends itself particularly well to dispensing viscous products.
BRIEF DESCRIPTION OF THE DRAWINGS
The attached drawing represents, by way of example, two embodiments of the invention.
FIG. 1 is a view, in axial cross-section, of a first embodiment of the valve in the rest position.
FIG. 2 represents the same valve in the opened position for the inlet of a pressurized fluid.
FIG. 3 is a view, in axial cross-section, of a second embodiment in the closed rest position.
FIG. 4 is a view of the same valve in the opened position for the inlet of a pressurized fluid.
FIG. 5 is a view, in cross-section along V--V of FIG. 3.
FIGS. 6 and 7 represent alternative forms of the second embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
The valve represented in FIGS. 1 and 2 comprises a valve body constituted by a first cylindrical part 1 having an axial cylindrical hollow 2 into which is fitted a second cylindrical part 3 in which an essentially cylindrical chamber 4 is formed. The parts 1 and 3 are welded, bonded or driven in depending on the material used. The chamber 4 has a cylindrical
REFERENCES:
patent: 540154 (1895-05-01), Dreisoerner
patent: 2596368 (1952-05-01), Brunton
patent: 3454041 (1969-07-01), Masson
patent: 3580274 (1971-05-01), Hansen
patent: 4121619 (1978-10-01), Paulinkonis
patent: 4543985 (1985-10-01), Healy et al.
patent: 4611625 (1986-09-01), Bugaenko et al.
patent: 4620562 (1986-11-01), Pacht
patent: 4922955 (1990-05-01), Uri
Hepperle Stephen M.
Hobac S.A.
LandOfFree
Automatic regulating valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic regulating valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic regulating valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-891688