Manual and automatic flow control valve

Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor

Reexamination Certificate

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Details

C251S030030, C251S040000, C004SDIG003

Reexamination Certificate

active

06659420

ABSTRACT:

BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to control valves, and particularly to a manual and automatic flow control valve, wherein the manual and automatic flow control valve can be used in a urinal or a faucet. The manual and automatic flow control valve of the present invention has a simple structure and can be updated easily.
(b) Description of the Prior Art
Referring to
FIG. 1
, a prior art flush device of a urinal includes a valve body
10
, a main water flow valve
20
, a pressure releasing rod
30
, an upper cover
40
and a manual control unit
50
. One side of the valve is installed with a water inlet chamber
101
which is bent and then extends upwards. The lower side thereof is vertically installed with a water outlet chamber
102
. An upper end of the water outlet chamber
102
is vertically protruded to the upper end of the water inlet chamber
101
. The two chambers are communicated above an upper end of the valve body and are sealed by an upper cover
40
. The main water flow valve
20
is a hollow cylinder made of plastics and an upper end thereof has a film
201
thereaound. One or at least one penetrating holes
202
are formed on the film. The film
201
runs across and seals the upper opening of the water outlet chamber
12
for separating the water outlet chamber
102
and water inlet chamber
101
. An upper side thereof is formed with a pressure chamber A. The pressure releasing rod
30
is a vertical rod an upper end of which is formed with a valve piece
301
. The valve piece passes through the main water flow valve
20
. Thereby, the upper valve piece
301
will seal the hole at the middle section of the main water flow valve
20
and a lower end thereof extends to protrude out of the lower end of the main water flow valve
20
. As a result, the water flow of water inlet channel A can flow through a small hole
202
of the film
201
. Thereby, the pressures of the water inlet chamber
101
and the pressure chamber A are balanced and the film
201
will resist water flow. When the manual control unit
50
of the valve body
10
pushes the pressure releasing rod
30
to tilt, the water of the pressure chamber A will fall out and the water inlet chamber
101
will push away the film
201
. Thereby, the prior art can be used in the prior art urinal or faucet.
The above mentioned prior art structure is manual controlled, while it is often that the user forgets to flush water and thus the next user will feel uneasy. Therefore, a manual and automatic controlled urinal flush device for being used in schools, bus stations, departments, or other public places. This prior art design must update the whole structure of the valve and the internal components of the urinal flush device. Therefore, the prior art urinal flush device must be detached. Otherwise, it can not be updated. However, this is a large burden to the user, especially to the schools, bus stations, departments, or other public places.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a manual and automatic flow control valve including a valve body, a manual control unit, a hollow pressure-releasing device, a middle plate, an upper casing, and an electric controlled magnetic unit. The internal of the valve body has a water inlet chamber and a water outlet chamber. A plastic main water flow valve is formed between an upper end of the water inlet chamber and the water outlet chamber for isolating the two pressure chambers. A hollow pressure-releasing device is installed in a hollow portion of a main water flow valve, which extends downwards. An upper side of the main water flow valve is a middle plate. An upper side of the middle plate is installed with an upper pressure chamber which is communicated with a lower pressure chamber and the hollow pressure-releasing device. Thereby, the manual control unit can push the hollow pressure-releasing device to tilt. The electric controlled magnetic unit can control the hollow pressure-releasing device to communicate with the upper pressure chamber. If water drains from the lower pressure chamber, the water will push away the main water flow valve.


REFERENCES:
patent: 5125621 (1992-06-01), Parsons et al.
patent: 5244179 (1993-09-01), Wilson
patent: 6019343 (2000-02-01), Tsai
patent: 6161814 (2000-12-01), Jahrling
patent: 6382586 (2002-05-01), Wilson et al.

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