Fluid handling – Diverse fluid containing pressure systems – Liquid filling by evacuating container
Reexamination Certificate
2001-08-24
2002-11-26
Michalsky, Gerald A. (Department: 3753)
Fluid handling
Diverse fluid containing pressure systems
Liquid filling by evacuating container
C184S001500
Reexamination Certificate
active
06484744
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an oil pumping device, and particularly to an oil pumping device which can be assembled easily.
BACKGROUND OF THE INVENTION
Referring to
FIG. 8
, a plurality of handhold oil absorbing device is illustrated. The device has an oil storage tank
7
. The upper cover
71
and lower cover
72
of the oil storage tank are connected to an upright pump
8
. The pump
8
has a piston
81
therein. The piston rod
82
of the piston
81
passes out of the upper cover
71
of the oil storage tank
7
and a handle
83
is installed for being operated by the user. The upper cover
71
has an air inlet channel
711
. The channel
711
is communicated with the pump
8
and the oil storage space
73
of the oil storage tank. The inlet
712
of the air inlet channel
711
of the upper cover
71
has a unidirectional air inlet valve
713
. The unidirectional air inlet valve
713
is installed with a ballcock
714
. The lower cover
72
is installed with a unidirectional pressure relief valve
9
. The pressure relief valve
9
is within the pump
8
.
When the handle is pulled upwards so as to lift the piston
81
, the air above the piston
81
will be extruded to flow to the lower side of the piston
81
. When the piston rod
82
is pushed so that the piston
81
descends, then the air below the piston
81
will be released from the pressure relief valve
9
, and the air above the piston
81
will decrease so that air in the oil storage space
73
flows through the unidirectional air inlet valve
713
to enter into the pump
8
. Therefore, oil flows to the oil storage space
73
through an air absorbing tube. When the piston rod
82
is pulled upwards and downwards repeatedly, oil in the oil storage tank is absorbed and flows to the oil storage tank
7
. When the oil in the oil storage tank has achieved to a predetermined height, the ballcock
714
moves upwards to close the unidirectional air inlet valve
713
to prevent oil from entering into the pump
8
.
The prior oil pumping device has the following disadvantages.
1. In assembly, the unidirectional air inlet valve
713
and pressure relief valve
9
and other components are installed to the upper cover
71
and lower cover
71
individually. Then the upper cover
71
, lower cover
72
and pump
8
are assembled together. The process is complex.
2. Since the upper cover
712
must have an inlet
712
and an air inlet valve
713
, oil tubes and other components are necessary. Therefore, a predetermined thickness and cross section are necessary. The cost in material is increased. Furthermore, the gravitational center is high, and thus it is unstable.
3. The upper cover
71
is formed with an air inlet channel
711
.
The air inlet channel
711
must be communicated with the pump
8
and the oil storage space
73
so as to have an approximate L shape. The process is complex. To install a unidirectional air inlet valve
713
to the upper cover
71
, more machining processes are necessary.
4. Although the ballcock
714
is used to prevent oil from flowing into the pump
8
, more parts are necessary for installing the ballcock. The assembly work is complex. Besides, since the ballcock
714
is connected to a driven device so that as the ballcock lifts, the air inlet valve is closed. If the assembly work is not very precise or some parts have faults. The driven device can not work in normal so that the unidirectional air inlet valve can be not closed.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide an oil pumping device, wherein an unidirectional air inlet valve is installed directly in a pump. The pump has an air inlet hole and an oil storage tank formed by air inflation is used in the present invention. Therefore, the process and cost in manufacture is reduced.
To achieve above objects, the present invention provides an oil pumping device including an oil storage tank. An upright pump is installed between the upper cover and lower cover of the oil storage tank. The interior of the pump is installed with a piston and a unidirectional air inlet valve. The outer peripheral surface of the oil storage tank has a recess. The recess has an air inlet hole which is hollowed radially. Therefore, when the piston rod is pulled upwards or downwards repeatedly, the oil in the oil tank can be absorbed to the oil storage tank.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
REFERENCES:
patent: 5002154 (1991-03-01), Chen
patent: 5450924 (1995-09-01), Tseng
patent: 6112759 (2000-09-01), Hsu
Michalsky Gerald A.
Rosenberg , Klein & Lee
LandOfFree
Oil pumping device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oil pumping device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil pumping device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2970654