Fluid handling – Systems – Multi-way valve unit
Patent
1991-05-14
1992-09-08
Walton, George L.
Fluid handling
Systems
Multi-way valve unit
13762517, 1376362, 251235, F16K 1106
Patent
active
051449811
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a sanitary water valve with a control member, which consists of three disk cams situated above one another and which is enclosed by a casing, whereby the lower and the upper disk cam are stationery and the middle disk cam is displaceable relative to the stationery disk cams by an actuator that engages in it, whereby the actuator, which is arranged in two planes within the casing to tilt and to swivel, respectively, passes through the casing lid and the upper stationery disk cam.
A water valve having generic characteristics of this type is described in DE-OS 35 25 053.4; this water valve is characterized in particular by a control member consisting of three disks, whereby the middle disk is a moveable disk cam that is displaceable relative to the two outer stationery disks. The displacement of the middle disk cam and thus the regulation of the water flow are performed by an actuator, which engages in the middle disk cam and which is connected to it, to which end it passes through the lid of the casing that encloses the control member as well as through the upper stationery disk cam via a correspondingly arranged opening. In the known water valve, the actuator is supported by a spheroidal widening which is formed on it and which is situated in the opening of the upper stationery disk cam.
This results in the disadvantage that due to the cramped dimensions of the upper stationery disk cam only a very small radius can be formed for the bearing ball that is to be accepted by the upper disk cam. In the series production of larger quantities of water valves, however, it is almost impossible to adhere to the resulting narrow manufacturing tolerances. In addition, when the ball radius is small, the bearing surfaces that are available for the actuator in the upper disk are so narrowly dimensioned that sufficient stability of the bearing of the actuator in the upper disk as well as of the guidance of the middle moveable disk via the actuator can hardly be achieved.
In order to avoid such disadvantages, it is known from DE-OS 34 19 208, for example, in the case of a gasket which encompasses two disks, in which the actuator engages in the upper moveable disk, that the actuator is to be borne with a bearing ball having a comparably large diameter in the lid part of the casing which, accordingly, is thickly constructed. Such a solution, however, cannot be applied to a water valve according to this generic type because, due to the additional third disk cam and to a correspondingly thick construction of the casing lid to facilitate the acceptance of a bearing ball with a larger diameter, the construction height of the valve would overall exceed the beneficial scale.
It is therefore the objective of the invention to improve a water valve having the characteristics of this generic type in such a manner that its construction height is limited while, at the same time, facilitating an easily manufactured and effectively functioning bearing of the actuator.
The realization of this objective including advantageous embodiments and additional developments results from the contents of the patent claims preceding this description.
The invention starts out from the basic idea that the actuator is supported on bearings arranged on the outside of the casing, which encloses the control member, in such a manner that the fulcrum of the actuator is situated in the plane of the casing lid. This leads to considerable advantage that, on the one hand, the lid of the casing which encloses the control member can be kept relatively thin, because it must not fulfill a bearing function, only a passage function for the actuator; on the other hand, this advantageously entails a short distance between the fulcrum of the actuator, which is arranged in the plane of the casing lid, and its connection to the moveable disk. As a consequence, due to the short lever arm thus constructed between the fulcrum and the point of engagement at the middle disk as well as to the longer lever arm between the fulcrum and the handle, which is for
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American Standard Inc.
Kaplan Blum
Walton George L.
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