Fluid handling – Faucets and spouts
Reexamination Certificate
2001-11-02
2003-05-06
Fox, John (Department: 3753)
Fluid handling
Faucets and spouts
C137S801000
Reexamination Certificate
active
06557587
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a valve, and more particularly to a change-over valve.
2. Description of Related Art
As shown in
FIGS. 1-3
, a prior art change-over valve has a main body
10
, which is fastened with a spout
06
of a water faucet
05
by a connection pipe
11
. The main body
10
is provided in the interior with a slide slot
12
for receiving a switch rod
20
. The switch rod
20
is provided in the midsegment with a small diametrical portion
21
, which forms with the slide slot
12
a water slot
22
. The water slot
22
displaces as the switch rod
20
is slid in the slide slot
12
, so as to enable a water inlet
14
to be in communication with a water outlet
15
, as shown in
FIG. 3
, or with a water filter inlet
30
, as shown in FIG.
2
. In order to prevent the water leak, four washers
40
and
41
are provided between the switch rod
20
and the slide slot
12
. The first washers
40
are disposed in proximity of the water slot
22
, whereas the second washers
41
are disposed in two grooves
121
which are located at two longitudinal ends of the slide slot
12
. The grooves
121
are formed in the inner wall of the two longitudinal ends of the slide slot
12
at an additional labor cost. In addition, it is time-consuming to put the second washers
41
into the grooves
121
of the slide slot
12
. Furthermore, the water outlet
15
is eccentrically located such that the water flow tends to concentrate in one side of a water discharging cell
13
, thereby resulting in a nonuniform discharge of water “W”, as shown in FIG.
3
.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a change-over valve which is free of the drawbacks of the prior art change-over valve described above.
The change-over valve of the present invention comprises a connection portion, a main body, and a switch rod. The main body is provided with a slide slot in which the switch rod is slidably disposed. The switch rod is provided with two inner washers and two outer washers to ensure that the switch rod and the slide slot are leakproof. The main body is further provided with a water discharging cell in communication with the slide slot. The water discharging cell is provided with a water guiding member which is in turn provided in the center with a water discharging hole to facilitate the discharging of water in a uniform pattern.
The features and the functions of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 3682392 (1972-08-01), Kint
patent: 3722798 (1973-03-01), Bletcher et al.
patent: 3853761 (1974-12-01), McClory
patent: 4650470 (1987-03-01), Epstein
patent: 5279329 (1994-01-01), Pippel
patent: 5284582 (1994-02-01), Yang
patent: 6093313 (2000-07-01), Bovaird et al.
patent: 6135154 (2000-10-01), Chen et al.
patent: 6149801 (2000-11-01), Giordano et al.
patent: 6187187 (2001-02-01), Farley
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