Fluid handling – Systems – Multi-way valve unit
Patent
1993-12-16
1995-05-09
Rivell, John
Fluid handling
Systems
Multi-way valve unit
1376254, 251 54, F16K 11078, F16K 3172
Patent
active
054131448
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention refers to a mixer valve of the one-lever type for fluids, for example hot and cold water, and of the type that comprises a valve housing, which is provided with each an inlet and a common outlet for the liquids, an operating member for regulating the amount and the temperature of the fluid flowing out through the outlet, where the operating member is connected with a valve member cooperative actuator provided in the valve housing, whereby the actuator shows a built-in soft closing function intended to prevent too quick shut off of the valve, where the soft closing function includes at least one sealed chamber that comprises a movable piston which at the closing movement of the operating member is provided to press a fluid out from the chamber via a throttling member.
THE BACKGROUND OF THE INVENTION
At a quick shut off of certain mixing valves of the one-lever type, in particular if the water pipes are of small dimension, a pressure chock can occur that exposes the water piping system the strong loads as well as causing noise.
Through for example SE-B-462 503 and SE-B-455 124, mixer valves are known, which are provided to build up a pressure in a provided part of the valve upon a quick shut off of the valve lever, so that a certain damping resistance is obtained at the endphase of the lever, which requires added force and thereby extends the closing phase. This happens for the reason that the valve is equipped with a separate pressure chamber, that is filled up via a non-return valve when the valve opens. When closing the valve the water is pressed out from the pressure chamber through passages in the non-return valve, whereby a too rapid closing movements is slowed down.
These known, so-called soft-closing mixer valves show the disadvantage that they feel inert even at a normal shut off compared to a mixer without the soft-closing function. They are furthermore sensitive to impurities in the water, which may damage the parts included in the soft-closing function. Moreover the whole valve begins to leak if a leakage arises in the soft-closing function.
THE OBJECT OF THE INVENTION
The object of the present invention is to provide a mixer valve with a built-in soft closing function of the type mentioned in the introduction, which does not or in a very little degree affects the closing movement at a normal shut off of the valve and influences only at a quick-closing movement. This has according to the invention been achieved by the fact that the throttling member, when the pressure from the fluid is exceeding a certain value in said chamber, is pressed progressivly against a sealing face in the actuator and is thereby deformed elastically, whereby the flow passages arranged in the throttling member are reduced, so that the flow resistance increases for a quick-closing movement, while the flow resistance at a slow-closing movement is low.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in the following with reference to the enclosed drawings which shows a preferred embodiment.
FIG. 1 is a vertical cross-section through a mixer valve, for example a mixer valve for wash basins, equipped with a device constructed according to the invention.
FIG. 2 shows the closed position of the valve on an enlarged scale a cross-section of the actuator placed in the valve housing.
FIG. 3 is a section corresponding to FIG. 2 but in the open position of the valve.
FIG. 4 shows on an enlarged scale in cross-section taken on line III--III of FIG. 6 the throttling member arranged in the device, in the unaffected normal position.
FIG. 5 discloses a cross-section analogous with FIG. 4 through the throttling member in the affected, throttled position.
FIG. 6 discloses the plan view of the throttling member.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The mixer valve shown in FIG. 1 is of the so-called one-lever type and includes a valve housing 10 with a spout 11 and a control lever 12. The upper part 13 of the valve housing 10 is by means of the control lever 12 rotatable
REFERENCES:
patent: 2781519 (1957-02-01), Marchant
patent: 4112966 (1978-09-01), Carlson
patent: 4708172 (1987-11-01), Riis
patent: 4715406 (1987-12-01), Kress
patent: 4723574 (1988-02-01), Bergmann et al.
patent: 4736772 (1988-04-01), Ostertag et al.
patent: 4768749 (1988-09-01), Oberdorfer
patent: 4936347 (1990-06-01), Oracz et al.
Gustavsberg Vargarda Armatur AB
Rivell John
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