Fluent material handling – with receiver or receiver coacting mea – Filling or refilling of dispensers – By operation of means causing or controlling dispensing
Reexamination Certificate
2001-06-07
2002-03-19
Maust, Timothy L. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
Filling or refilling of dispensers
By operation of means causing or controlling dispensing
C141S021000, C141S025000, C141S041000, C141S044000, C141S309000, C137S565250, C184S028000
Reexamination Certificate
active
06357492
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a liquid changer, particularly to one provided with a changeover valve so that the liquid changer can not only store liquid therein but also pump out the liquid therein in another container with a pump attached outside of the liquid changer so as to increase liquid volume stored and to change liquid to be stored therein.
In case that oil in an engine, a transmission case, pressure oil, water in a water tank, lubricating oil, brake oil, industrial solvent or any waste water is to be exhausted to replace with new one, it is done almost manually by a technician and results in a technical expenditure. But now a liquid changer has been used instead of manual work.
2. Description of the Prior Art
A known conventional liquid changer shown in
FIG. 1
includes a cover
10
, a base
11
, a liquid tank
12
for storing liquid and a pump tank
13
for storing pressured air provided orderly between the cover and the base
11
, a pressing rod
14
deposited in the pump tank
13
and having an upper end protruding out of the cover
10
for locking a handle
140
. The lower end of the pressing rod
14
is fixed with a one-way valve
141
and the base
11
has a hole
110
in the center, and a one-way valve
111
is fixed on the hole
110
so that the air in the pump tank
13
may be pumped out through the hole
110
. The cover
10
has a one-way inlet
100
connected to the top end of the liquid tank
12
, and an oil inlet
101
bored in a sidewall of the top end, and an oil sucking tube
15
fixed on the oil inlet
101
and possible to extend in the an engine oil chamber. Then the pump tank
13
can exhaust out the air in the liquid tank
12
for easy change of engine oil. But this conventional engine oil-sucking device can only suck out engine oil from the engine oil chamber, impossible to pump in new engine oil in the same chamber. That results in much time and work in changing engine oil. Besides, the pump tank
13
is located in the liquid tank
13
, only storing a small amount of oil.
SUMMARY OF THE INVENTION
The objective of the invention to offer a liquid changer possible to store and use the liquid stored therein and change old liquid stored to new one easily.
The feature of the invention is a base, a liquid storing tank fixed on the base and closed with an upper cap, a pump also fixed on the base beside the liquid tank for pumping liquid in and out of the liquid tank, a changeover valve fixed at one side of the pump for.
Switching to pump in or pumping out liquid. The upper cap has a liquid inlet and outlet and a gas inlet and outlet, a guide tube fixed on the liquid inlet and outlet, and another guide tube fixed on the gas inlet and outlet. One more guide tube is fixed inside the liquid inlet and outlet, extending down in the liquid tank. The pump has a pump tank, and a press rod provided to extend in the pump tank and connected with a press grip, which has a bottom end fixed with a piston. The pump tank further has an outlet respectively formed in an upper end and a lower end, and connected respectively with a guide tube. The changeover valve has an air hole in a sidewall and connected to the gas guide tube of the liquid tank and an outlet in an upper end of the sidewall and an inlet in a lower end of the sidewall. The outlet of the changeover valve is then connected to the upper outlet of the pump and the inlet of the changeover valve is then connected to the lower outlet.
REFERENCES:
patent: 1439295 (1922-12-01), Craig
patent: 5203677 (1993-04-01), Lix et al.
patent: 5450924 (1995-09-01), Tseng
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