Valve seats and a ceramic control valve of a faucet

Fluid handling – Convertible – Unit orientable in a single location between plural positions

Reexamination Certificate

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Details

C137S625410

Reexamination Certificate

active

06805151

ABSTRACT:

RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to a faucet, and more particularly to two valve seats and a ceramic control valve of the faucet. The two valve seats are mounted in a back-to-back manner in conjunction with the ceramic control valve, thereby enabling the cold water to let out first whenever the faucet is opened.
BACKGROUND OF THE INVENTION
As shown in
FIG. 12
, a prior art faucet comprises two valve seats
30
and
301
, which are mounted in a back-to-back manner that the two valve seats
30
and
301
are in communication with a cold water pipe
31
and a hot water pipe
32
, and that the two valve seats
30
and
301
are corresponding in location to the water duct of the ceramic control valve
33
. The valve seats
30
and
301
have a water-discharging hole
34
, which is located along with a cold water guide hole
35
and a hot water guide hole
36
in a triangular manner, as shown in FIG.
13
. These three holes
34
,
35
and
36
are so arranged that they conform to the arrangement pattern of the water-discharging hole
37
, the cold water guide hole
38
, and the hot water guide hole
39
of the ceramic control valve
33
.
In operation, when the valve knob
40
of the ceramic control valve
33
is turned, the cold water duct is first opened so as to prevent a user from being burned by the hot water under the circumstances that the ceramic control valve
33
is assembled with the valve seat
30
located in an outer wall
41
. However, when the ceramic control valve
33
is assembled with the valve seat
301
located in an inner wall
42
, the hot water is first let out.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a faucet with valve seats and a ceramic control valve, which are free of the deficiencies of the prior art faucet described above.
The two valve seats of the present invention are provided in an assembly slot with a cold water guide hole and a hot water guide hole, which are located correspondingly on a central horizontal line of the assembly slot. The ceramic control valve is provided with a cold water inlet, and a hot water inlet, which are located correspondingly on a central horizontal line of a base of the ceramic control valve. The base of the ceramic control valve is provided with a water outlet cooperative with a lower hole of the assembly slot of the valve seat. As the ceramic control valve is assembled with the valve seat located in a real wall, the cold water is always let out first.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1
shows an exploded perspective view of the present invention.
FIG. 2
shows an exploded perspective view of the ceramic control valve of the present invention.
FIG. 3
shows a front view of the valve seat of the present invention.
FIG. 4
shows a plan view and a sectional view of the base of the ceramic control valve of the present invention.
FIG. 5
shows a schematic view of a valve seat of the present invention being mounted in a front wall such that the ceramic control valve is assembled with the valve seat, with the top drawing showing the cross section of the valve seat and the wall, with the middle drawing showing the front view of the base and the valve seat, and with the bottom drawing showing the relationship between the water control block and the water distribution seat.
FIG. 6
shows a schematic view of the closed flow path of the present invention.
FIG. 7
shows a schematic view of the cold water supply of the present invention.
FIG. 8
shows a schematic view of the simultaneous supply of cold water and hot water of the present invention.
FIG. 9
shows a schematic view of the hot water supply of the present invention.
FIG. 10
shows a schematic view of the assembly of the ceramic control valve of the present invention with the valve seat located in the rear wall, with the top and the bottom drawings being opposite to those of
FIG. 5
, and with the middle drawing being the same as the middle drawing of FIG.
5
.
FIG. 11
shows a schematic view of the cold water supply at the time when the ceramic control valve of the present invention is in action.
FIG. 12
shows a schematic view of a prior art faucet.
FIG. 13
shows another schematic view of the prior art faucet.


REFERENCES:
patent: 3674048 (1972-07-01), Manoogian et al.
patent: 4022242 (1977-05-01), Turecek
patent: 4243063 (1981-01-01), Parkison
patent: 4397330 (1983-08-01), Hayman
patent: 4423752 (1984-01-01), Psarouthakis
patent: 4584723 (1986-04-01), Hussauf
patent: 4609007 (1986-09-01), Uhl
patent: 4901749 (1990-02-01), Hutto
patent: 5095934 (1992-03-01), Iqbal
patent: 5425394 (1995-06-01), Clare
patent: 5725010 (1998-03-01), Marty et al.
patent: 5806552 (1998-09-01), Martin, Jr.
patent: 5893386 (1999-04-01), Caria et al.
patent: 6123105 (2000-09-01), Yang
patent: 6640357 (2003-11-01), Chang

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