Valves and valve actuation – Mechanical movement actuator – Lever
Patent
1998-10-27
2000-04-04
Walczak, David J.
Valves and valve actuation
Mechanical movement actuator
Lever
251213, F16K 3144
Patent
active
060451181
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention refers to a cartridge for a one-way hydraulic faucet of the type having a plane shutter member.
DESCRIPTION OF THE PRIOR ART
The cartridges of the type taken into consideration have, in most cases, a rotary shutter member with an excentrical passage opening, which co-operates with a fixed seal packing and, under action of a rotary control member, is made to rotate between a position of complete opening and a position of complete closure, through intermediate positions of regulation of the delivery rate. The main drawback of this structure resides in that the travel from the complete opening and the complete closure covers a very limited angular field, whereby the control of the delivery rate is difficult for the user and is little sensitive, because it needs to be done by means of very limited angular displacements.
There are also known cartridges of the type taken into consideration, wherein two plates of ceramic material are installed, the one, unmovable, being provided with an inlet opening and an outlet opening, and the other being movable in translation under action of a tilting control lever, and being provided with a channel intended to connect the passage openings of the unmovable plate. In this case, by choosing a suitable ratio between the arms of the control member, it is possible to render the control sensitive enough. However a drawback of these cartridges, which are of the closed type, resides in that the presence of two passage openings in the unmovable plate needs that these openings are disposed in an eccentric manner, and this involves providing complicated passageways in the faucet body for which the cartridge is intended. Moreover, the manufacture of such a cartridge is expensive due to the use of plates of ceramic material.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to find a remedy for all or a part of these drawbacks of the known cartridges, though preserving the respective advantages. More particularly, it is intended that the cartridge should afford an easy and sensitive control, that its manufacture cost should be limited, that its duration in use should be satisfactory, and that no complicate shape should be needed for the faucet body in order to allow installing the cartridge.
This object is attained, according to the present invention, in a cartridge for a one-way hydraulic faucet of the type having a plane shutter member, in that: the cartridge includes a cartridge body having a bottom portion wherein there is hollowed a cylindrical seat housing a sleeve packing provided with elastic pushing means; the plane shutter member is formed by a slide which is guided within the cartridge body for diametrical movement with respect to said body, is kept in operative contact with said sleeve packing, and shows an opening suitable for registering, in a position of the slide, to the passage of said sleeve packing, whereas the slide, in another position, closes said passage; and said slide is kinematically coupled to an inner arm of a lever, which is pivoted in the cartridge body and whose outer arm forms the control member of the faucet.
Preferably, said slide is manufactured of a suitable plastic material.
Preferably, said sleeve packing is installed in the bottom portion of the cartridge body in a central position.
Thanks to these features, the control of the faucet may be rendered easy and sensitive by means of a suitable choice of the ratio between the two lever arms. Because the closure of the faucet is ensured by the sleeve packing, the slide does not need to be manufactured of an expensive material such the ceramics, on the contrary it may be made of a suitable plastics, whereby the manufacture of the cartridge is easy and cheap. Because such a cartridge is of the open type, the bottom of the cavity of the faucet body, intended to house the cartridge, only needs to have a passageway for water inlet, which moreover may be central, whereby there is no need for a complicated structure of the faucet body.
Prefera
REFERENCES:
patent: 3598364 (1971-08-01), Grenier
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