Fluid handling – Systems – Multi-way valve unit
Patent
1993-01-27
1994-04-19
Rivell, John
Fluid handling
Systems
Multi-way valve unit
1376254, 137801, 251127, F16K 11074, F16K 4708
Patent
active
053037375
DESCRIPTION:
BRIEF SUMMARY
This invention concerns a sanitary fitting with a body that can be mounted in a stationary position and has inlet channels, an outflow channel and optionally an outlet channel, with a sleeve that is placed on the body of the fitting and can be pivoted with respect to the body of the fitting, with a pivoting outlet arm--a swivel arm--that is hydrodynamically connected to the outflow channel, is positioned on the sleeve and can be swiveled together with the sleeve and has an outlet mouthpiece and preferably an outlet aerator on the mouthpiece, and with a valve unit, preferably designed as a single-lever cartridge, mounted on the body of the fitting, whereby packing rings designed as lip seals are provided in the area of the outflow channel between the body and the sleeve of the fitting.
Sanitary fittings of the type in question here have long been known. When the outlet arm is designed as a swivel arm, they are especially popular for use in the kitchen area, especially in the form of single-lever, single-hole combination units. With a sanitary fitting known from practice on which this invention is based (see the installation and operating instructions for the sanitary fitting Eurodisc 33,891 from the company Friedrich Grohe Armaturenfabrik GmbH & Co.), two peripheral lip seals are provided between the body of the fitting which is screened into the sink and the sleeve of the fitting, so the seals are arranged above and below an outflow channel running through the sleeve. A valve unit in the form of a single-lever cartridge is mounted in a stationary mount on the body of the fitting by means of mounting bolts. An upper bearing ring is provided between the valve unit and the body of the fitting. A lower bearing ring rests on a lower ring flange of the body of the fitting and projects from there between the body of the fitting and the sleeve of the fitting.
If an outlet aerator is provided on the outlet mouthpieces, it acts as a throttle for the water flow. Flow through the aerator depends greatly on the pressure, however, but this may not be especially pleasant under some circumstances. When the sanitary fitting is operated as a combination unit together with a low-pressure water heater, a pressure reducing valve is needed to throttle the cold water inlet pressure to the low-pressure water heater.
For this reason, appropriate pressure reducing valves are connected to the outlet channel which is then provided. In addition, it has also been found that when washing machines and/or dishwashers are connected to the cold water inlet line, they lead to pressure surges in the cold water inlet line when the solenoid valves used in such appliances close. This presents a great load on the sensitive internal parts of the valve unit and sometimes damages them. Finally, it has been found that the lip seals which permit easy swiveling of the swivel arm undergo such a great deformation at a high internal pressure that the sealing pressure makes it very difficult to move the swivel arm.
This invention is based on the problem of designing and refining the known sanitary fitting described above in such a way that the swiveling outlet arm, referred to as a swivel arm here, can always be pivoted with little exertion of force regardless or essentially regardless of the position of the valve unit.
The sanitary fitting according to this invention is characterized in that a flow stabilizer is provided on the water outlet side of the valve unit, i.e., in the outflow channel in the direction of flow in front of the gaskets and optionally also in the outlet channel. The flow stabilizer which is arranged on the water outlet side of the valve unit according to this invention keeps the flow largely constant in a manner that is largely independent of the pressure, so at any rate the pressure fluctuations on the outflow side are within a very narrow range. This has various consequences. First, an outlet aerator having a very low flow resistance so that it hardly acts as a throttle can now be used. The flow is kept constant by the flow stabiliz
REFERENCES:
patent: 4157099 (1979-06-01), Delker et al.
patent: 4301836 (1981-11-01), Hunziker
patent: 4596376 (1986-06-01), Knapp
patent: 4624415 (1986-11-01), Hofstetter, Jr.
patent: 4632791 (1986-12-01), Keppel et al.
patent: 4838304 (1989-06-01), Knapp
patent: 4903725 (1990-02-01), Ko
patent: 4960260 (1990-10-01), McEnearney
Eurodisc 33 891, Friedrich Grohe, Aug. 1987.
American Standard Inc.
Knab Ann M.
Rivell John
Robinson Elaine Brenner
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