Dispensing – With discharge assistant – Fluid pressure
Reexamination Certificate
1999-11-19
2001-01-09
Derakshani, Philippe (Department: 3754)
Dispensing
With discharge assistant
Fluid pressure
C222S400800
Reexamination Certificate
active
06170716
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an oil can structure, and especially to an oil can, wherein by rotating a rotary seat, a stud will be screwedly combined with a sliding barrel with inner thread to be moved upwards and downwards so that the inner barrel in a lower seat is driven with a small power, thus, high pressure air will be compressed into the body having oil. Therefore, the jet seat can be pressed easily to jet out oil and air.
BACKGROUND OF THE INVENTION
With reference to
FIGS. 1
,
2
, and
3
, a perspective view, an assembled cross sectional view in compressing air and after compressing air of a prior art oil can are illustrated. The prior art oil can includes a body
1
, a tube
12
, a seat
13
, a trumpet seat
14
, a small stopper
15
, a larger stopper
16
, a piston seat
2
, a telescopic tube
25
, a jetting head
26
, a lock head
27
. The cylindrical body
1
has an outer thread
11
at the protrusion of the upper opening. In order that the compressed air, filling air and oil can be jet out, an U shape piston seat
2
is disposed at the upper side of the body
1
. A via hole
22
for receiving the telescopic tube
25
is installed atop the piston seat
2
. The lateral side of the via hole is installed with a vent
23
. In order that the that the aftersaid piston hat can be engaged and slides for compressing air, a concave chamber
24
is installed at the periphery of the piston seat
2
. In order that the piston seat
2
can be tightly combined with the body
1
at the upper side, a pad
21
is installed therebetween. In order to control the flowing of high pressure air, a large stopper
16
, a small stopper
15
, and a trumpet seat
14
with via hole
141
are sequentially installed within the piston seat
2
(i. e. below the via hole
22
and vent
23
). An engaging seat
13
with a via hole
132
at the center thereof and a wind portion at the lateral side
131
are installed below the trumpet seat
14
. A tube
12
is installed below the engaging seat
13
with a via hole
132
at the center thereof and a wind portion at the lateral side
131
. The telescopic tube
25
with a vent
252
at the center thereof is installed with a block
252
for be engaged with the jet head
26
of the jet hole
261
. In order that the piston seat
2
can be fixed to the outer thread
11
atop the body
1
, a lock head
27
with an inner thread
271
can be installed at the outer cover. A piston hat
28
with a block
282
having a long tube
281
is installed at the inner periphery of the U shape piston seat
2
.
With reference to
FIG. 2
, when a high pressure air is desired to be compressed into the body
1
, a long tube
281
having a block
282
below the piston hat
28
is passed through the concave seat
24
and then is pulled rapidly. As it is pushed downwards, the air
3
above the long tube
281
of the piston hat
28
will flow into the piston seat
2
through the air hole
23
to enter into the piston seat
2
. The air will push away the large stopper
16
and then flows through the small stopper
15
, and then flow into the body
1
with oil
31
from the via hole
141
of a trumpet seat
14
(as indicated by arrow). As the piston hat
28
is pulled upwards, air
3
will enter into the long tube
281
for pressing downwards next time.
With reference to
FIG. 3
, as air is compressed into the body
1
, high pressure air
3
will push the large and small stoppers
15
and
16
installed between the piston seat
2
and the trumpet seat
14
upwards, the large stopper
16
will seal the air hole
23
atop the piston seat
2
. Thus, high pressure air
3
can not flow out from the via hole
141
of the trumpet seat
14
. Therefore, high pressure air
3
is sealed to fill fully in the body
1
.
With reference to
FIG. 4
, a prior art device for jetting air and oil is illustrated by an assembled cross sectional view. As the oil is desired to be jetted out, the jetting head
26
must be pressed down, then the telescopic tube
25
is pressed down synchronously. Thus tube
25
with a seal lower side and a via hole
252
will enter into the piston seat
2
, and then the large and small stopper
15
and
16
will press down, so that the high pressure air
3
will flow into the via hole
141
of the trumpet seat
26
to be jetted out. Then, the tube
12
at the center of the trumpet seat
14
and the seat
13
will be released with the high pressure air
3
so as to carry out the oil
31
within the body
1
.
However, prior art structure has some defects. For example, each time in using, the piston hat
28
must be covered for compressing high pressure air
3
and then moves longitudinally. With the increment of the air pressure within the body
1
, it becomes more and more difficult with a large power. When the oil can is used, the piston hat
28
must be pulled out to be further stored, otherwise, the jetting head
26
can not be pressed down. Moreover, the prior art piston hat
26
has not any confining structure, thus, as it is pulled out, a large traveling length will be induced so that the hat
26
falls out. Therefore, prior art structure is not a convenient design.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a oil can structure comprising an upper cover, a lock head, a jetting seat, a body, a lower seat, a piston, a sliding barrel and a rotary seat. Thereby, the oil can being operated easily and conveniently with less power and labor hour. The body receiving high pressure air and oil has an outer thread and an inner thread at the upper and lower inner side thereof. The outer thread has a jetting seat with a tube. The jetting seat has a jetting hole for jetting oil and air. Moreover, a lock head is installed at an outer cover of the jetting seat; the locking head has an inner thread for being screwedly engaged with the outer thread at the upper side of the body. A lower seat with an O ring, an outer thread, and an elastic hook are installed at the body. A post with vent and enclosed by a plastic cover is installed at the center of the lower seat. An inner barrel and strips are formed at the lower inner side and lateral side thereof. A sliding barrel with a positioning groove is installed within the inner barrel. The sliding barrel is installed with a big tooth at the inner lower side thereof and has a table having a rotary seat which can be engaged with the elastic hook of the lower seat. The center thereof has a stud for being engaged with the inner thread of the sliding barrel. By bidirectional rotation of the rotary seat at the lower seat, a piston installed at the inner barrel of the lower seat slides upwards and downwards so that air will be compressed into the body to have a high pressure, therefore, as the jetting seat is pressed, oil and air will jet out together.
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: 5020696 (1991-06-01), Cater
patent: 5323935 (1994-06-01), Gosselin et al.
patent: 5385276 (1995-01-01), Yen-Tang
Bui Thach
Derakshani Philippe
Dougherty & Troxell
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