Valves and valve actuation – Hermetic flexible wall seal for actuator
Reexamination Certificate
2000-09-05
2002-05-07
Derakshani, Philippe (Department: 3754)
Valves and valve actuation
Hermetic flexible wall seal for actuator
C251S077000, C251S215000, C251S288000
Reexamination Certificate
active
06382592
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a valve, and more particularly, to a valve having a handle which can be smoothly manipulated to thereby simply and swiftly control flow and entrance/exit of fluid, in which a wear of a valve sheet is prevented in advance to use the valve semi-perpetually.
2. Description of the Related Art
In general, valves are widely used in various industrial fields since they simply and swiftly control flow and entrance/exit of gas or fluid flowing in a tube.
FIG. 4
is a sectional view of a conventional valve. As shown in
FIG. 4
, a valve
60
includes a valve body
61
, and a valve rod
65
which can open and close a valve sheet
63
formed in the valve body
61
. A handle
70
by which the valve rod
65
can ascend and descend is installed in the upper portion of the valve body
61
.
However, the conventional valve
60
employs such a configuration that an air-tight state is maintained by interposing a single O-ring
67
in the valve rod
65
which ascends and descends by the handle
70
. Thus, oil cannot be stayed for a long time in order to have the valve rod
65
smoothly ascend and descend in the periphery of the O-ring
67
. As a result, oil is easily worn out, which causes the handle
70
not to be smoothly and simply manipulated.
Also, the conventional valve
60
adopts a configuration which can open and close the valve sheet
63
in which a rubber packing
69
is installed in the end of a stem
68
or the valve rod
65
. However, since the rubber packing
69
blocks a wider area than that of the valve sheet
63
, the rubber packing
69
is worn out or broken when using it for long, which causes the air-tight state not to be maintained.
In addition, a screw
65
a
formed in the valve rod
65
has a small angular slope in the screw thread in the case of the conventional valve
60
.
In the case that the angular slope in the screw thread of the screw
65
a
is small, an opening and closing distance is long. As a result, the handle should be turned several times in order to control flow and entrance/exit of fluid, which causes a user to feel burdensome.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide a valve having an excellent general purpose usability in which a handle can be flexibly manipulated to thereby simply and swiftly control flow and entrance/exit of fluid.
It is another object of the present invention, to provide a valve which can be used semi-perpetually in which a wear of a valve sheet is prevented in advance.
To accomplish the above object of the present invention, there is provided a valve having a valve body, a valve sheet formed in the valve body, a valve body which contacts the valve sheet in axial direction, to thereby open and close the valve sheet with a knurling portion and a screw, and a handle combined with a handle combination unit formed in the upper portion of the valve body, so that the valve rod can ascend and descend, the valve comprising: an oil storage unit installed between the knurling portion and the screw, to smoothly maintain the ascending and descending of the valve rod; a two-line screw in which the angular slope of the screw thread in the screw is greatly formed so as to be opened and closed by rotation of 90° of the valve rod; and a stem which contacts the valve sheet in which the shape of the end portion of the stem is conical, wherein the sectional shape of the valve sheet is conical.
Here, it is preferable that the oil storage unit comprises: a rib protruding outwards from the outer circumferential surface of the valve rod; a plurality of grooves formed spaced by a predetermined interval in the rib; first and second O-rings disposed in the groove; and an oil storage chamber formed between the first and second O-rings.
It is also effective to form the stem by use of engineering plastic. Also, it is preferable that a washer is interposed between the valve rod and the stem.
Meanwhile, it is effective to further comprises: at least one stopper protruding outwards from the inner wall of the handle; and at least one rotation prevention portion formed in the outer circumferential portion of the combination unit, and contacting the stopper, to thereby prevent the handle from rotating by more than 90°.
REFERENCES:
patent: 3581728 (1971-06-01), Abraham et al.
patent: 4363466 (1982-12-01), Barlett
patent: 4732192 (1988-03-01), Shen
patent: 4751943 (1988-06-01), Chi
patent: 5447203 (1995-09-01), McLoughlin et al.
Bonderer David A.
Coleman Sudol Sapone P.C.
Derakshani Philippe
Sapone William J.
LandOfFree
Valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2819535