Fluid handling – Systems – Articulated or swinging flow conduit
Reexamination Certificate
1999-11-03
2001-11-27
Michalsky, Gerald A. (Department: 3753)
Fluid handling
Systems
Articulated or swinging flow conduit
C004S677000, C137S801000
Reexamination Certificate
active
06321788
ABSTRACT:
Mixers have become known which use, as a water supply for cold and warm water, flexible hoses that extend from the base, which is tightly connected to the working surface, to the mixer mounted at end of the outlet. Since these hoses are constantly exposed to the pressure of the water supply line, they have to be surrounded by a metal lattice. With these hoses, the ability of the outlet to pivot within a limited range is made possible. With every pivoting of the outlet, however, a torque is applied to the screw connections of the hoses in the tight base part, which leads to that the connections release themselves and thus could become imperfectly sealed. Further, the danger exists that the metal lattice is damaged through the constant twisting and that the hose breaks. In addition, the two relatively rigid hoses can oppose the pivoting movement of the outlet in both of the terminal positions by means of an undesirable resistance, and the hoses, if they touch one another or the inside of the outlet, can cause an ugly scratching sound and also damage to the metal lattice. If a hose connection or a hose leaks, the leaking water runs back through the outlet and drips off below the working surface. Since this leaking water often remains unnoticed for a longer period of time, larger water damage can occur.
In DE-OS 31 20 210, a pivoting outlet having a mixer valve at the free end is described which partially eliminates a part of the above problem. The front end of the hoses for the cold and warm water can be rotated but is inserted in borings of the mixer housing in an axially secured manner. The hoses must then rotate themselves, in the pivoting of the outlet, lengthwise along its curved axle. In so doing, the metal lattices of the hoses can still rub against one another because both hoses have to turn in the same direction. Additionally, the O-ring seal of the pivoting hose ends can become imperfectly sealed over time.
It is the object of the present invention to create a pivoting outlet which makes possible an unhindered pivoting of the outlet and a problem-free throughput of the high-pressure, warm and cold water supply to the mixer valve. This problem is solved by means of the combination of characteristics of claim
1
.
REFERENCES:
patent: 3373770 (1968-03-01), Ward et al.
patent: 3410487 (1968-11-01), Hyde
patent: 3653407 (1972-04-01), Katva
patent: 3726318 (1973-04-01), Hyde
patent: 4262699 (1981-04-01), Fabian
patent: 4794952 (1989-01-01), Burkard
patent: 31 20210 (1982-12-01), None
patent: 35 19 763 (1986-12-01), None
patent: 3811521 (1989-10-01), None
Armaturefabrik Wallisellen AG
Michalsky Gerald A.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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