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Патент USA US3078080

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Feb. 19, 1963 >
Filed Jan. 8. 1960
A ltorney:
United ?tates Patent @??ce
Patented Feb. 19, 1963
to the head 3: thus the entire cavity has a sectional form
Harry Christopher Cooper, Three Bridges, Crawley, Eng
land, assignor to The A. P. V. Company Limited,
Crawley, England
lFiied Jan. 8, 1960. Ser. Ne. 1,266
Claims priority, application Great Britain Jan. 12, 1959
3 Ciainis. (Ql. 251-306)
comprising the cylindrical part 5b into which merges the
cavity corresponding to the pro?le form of the blade 4.
It will be seen that the blade 4 controls communica
tion between the ?ow passages, the peripheral contour of
the blade 4 cooperating with the surface of the cavity
over which surface the pro?le of the blade moves when
the control component 1 is turned about its axis X—X.
The cooperation between the circular head 3 and the
This invention relates to valves which are required to 10 cylindrical part 5b of the recess provides a continuous
provide a leakage-free shut off or change-over: where
seal in all positions of the component 1 against leakage
such conditions are imposed it is usual to provide a taper
outwardly from the casing 5 at the zone at which the
plug which is mounted in a tapered socket in a valve cas
component 1 must be accessible for operation from
outside the casing 5.
ing arranged to be inserted in the pipe line for the ?ow,
the plug having through openings or peripheral gaps to
enable ?ow to be established by turning the plug.
In "some applications it may be possible to form the
component 1, of a material such as hard rubber which
would have su?icient resiliency to make proper ?uid
Now according to the present invention the plug is re
tight engagement with the surface of the cavity. Prefer
placed by a regulating component having a head with a
ably however, as is shown the component is formed by
circular periphery and a control blade which extends from
one side of the head, the blade having a pro?le or edge 20 a metal core having the required shape, with a thin
running from one point on the diameter of the head
sheath or jacket 2 of rubber (or other resilent material)
down to a return zone at which it curves over to return
to a diametrically opposite point on the diameter of the
head, the pro?le being symmetrical about the axis of the
?tted over the core.
The outer face of the head 3 can as is shown in FIG
URE 1 have the necessary operating spindle 7 passing
25 outwardly from it, and as the circular head forms the
outward seal it is necessary to provide merely a steady
The casing has a cavity which is formed by the ?gure of
to hold the spindle in the required position. This steady
revolution of the component about its axis: thus the
can be formed quite simply by a cap 9 which is ?tted to
cavity has a cylindrical upper part and a part having a
a hollow boss 6 on the casing 5, the cap having a tubular
section corresponding to the pro?le form of the blade.
The flow openings in the casing are below the cylin 30 extension 8 in which the spindle 7 is rotatable with a
plain metal-to-metal engagement: preferably as is shown
drical upper part and extend into the cavity in the part
the cap 9 is formed as a disc engaged by a ?anged screwed
corresponding to the ?gure, i.e. surface of revolution of
ring 10 which pulls the disc on to the boss 6.
the blade part. These flow openings could be arranged at
As is shown in FIGURE 3 the regulating component 1
di?erent angles about the axis so that by turning the
component the blade could cut-off the openings in the 35 can be formed separately from the spindle 7.
An important advantage of the construction of this in
case of a shut down valve or could connect different
vention can now be referred to: as the cylindrical part 5b
openings in the case of a change-over valve.
of the cavity is at least as large in diameter as the widest
With such an arrangement, the circular periphery of
the head provides the seal against the cylindrical part of
the cavity to prevent leakage outwardly past the com
ponent where connection has been made externally for
turning the component: the seal between the various ?ow
openings is provided by the cooperation of the edge of the
blade with the corresponding part of the cavity.
The invention is illustrated in the accompanying
drawing in which FIGURE 1 is a longitudinal section
through a valve according to the invention, the valve
being in the closed position, FIGURE 2 is a sectional
elevation and FIGURE 3 a perspective view of the valve
part of the blade 4 the component 1 can be lifted out of
the cavity simply by removing the cap 9. In the reverse
action the mere ?tting of the component 1 makes the out
ward seal and the inter-passage seal.
A further operational advantage is presented in that
the valve can be adequately cleaned by circulating a
cleaning agent (usually a detergent) through the valve.
With the normal type of plug cock, solid material be
comes lodged between the sealing surfaces during opera
tion and this cannot always be reached by the detergent
which is circulated for cleaning purposes. With a com
regulating component according to the invention, 50 ponent according to this invention, because the sealing
FIGURE 4 is a local sectional elevation of a modi?ed
surfaces are disengaged when the valve is opened (with
mounting of the spindle of the regulating component
the exception of a small contact area at the bottom), the
and FIGURE 5 is a sectional plan view showing the in
vention applied to a two-way valve.
valve can easily be cleaned in place. The component 1
could also be so designed that is could be raised during
from one face of which extends a control blade 4.
This blade 4 has a pro?le or edge 42” which runs from
a point on the diameter of the head down to a return
blade 4 shall converge as they recede from the circular
In various ?gures the casing of the control valve is 55 cleaning so that even the contact area at the bottom could
be cleaned: this would involve making the upper part or
indicated at 5, this casing having ?ow passages terminat
head 3 of the component 1 cylindrical so the outward seal
ing in ?ow connections indicated at 5a of one form or
is maintained with the cylindrical surface 5b even when
another. Disposed in the casing between the ?ow pass
ages is a value regulating component indicated generally
the component is in the raise position.
It is preferred that the parts 411 of the pro?le of the
at 1: this component is formed with a circular head 3 60
head 3 towards the convexly curved return, i.e. side edge
connecting part 4'’: this enables the component to be
forced “into the taper” by the cap 9 pressing down on
curve 4*’ at a diametrically opposite point with respect to
the axis of the ?ow passages, the blade then extending 65 the head 3.
The parts are so dimensioned that as is shown the
back to the head and being thus of what may be termed
bottom of the cavity is level with the bases of the ?ow
spade form which is symmetrical about the axis X—X of
openings so that an unbroken flow base is created to
the circular head and lying on that axis.
The casing 5 is formed with a cavity which is shaped 70 avoid the settlement of matter: thus when the component
is pressed down into the cavity, it “bottoms” on the line
to the ?gure of revolution formed by the blade 4, the
of the base wall of the ?ow openings.
cavity including a cylindrical bore part 5b corresponding
In FIGURE 4 is shown a modi?ed arrangement in
which the spindle 7 is adjustable axially relative to the
cap 9, this being achieved by making the tube 8 adjustable
on the cap 9.
FIGURE 5 shows the invention applied to a two-way
change over shut-off valve for which purpose the com
ponent 1 is mounted to turn in a cavity into which the
three pipe connections 11, 12, 13 open.
blade may be inserted through said bore to position said
blade within said surface of revolution, and said head
having a diameter enabling said head to ?t Within and
have peripheral sealing engagement with the wall of said
bore when said blade is so positioned within said surface
of revolution, said head and said blade being the sole
movable valve component parts contactable by ?uid
passing through said passage; and a cap removably
Apart from its operational advantages a control valve
according to this invention would be cheap to manufac
ture and would not require precision production to en
sure the required ?t as is necessary in the case of the
secured to said body and having a part engageable with
said head for exerting force thereon in the direction of the
asix of rotation of said valve component whereby to hold
the latter so positioned relatively to said body as to es
normal taper-plug.
tablish a tit between said blade and said surface of revolu
It will be understood that the invention comprises not
tion enabling free rotation of said valve component but
only the assembly of the regulating component 1 and 15 providing effective closing of said passage when said blade
the housing or casing 5 formed to receive it but also
is transverse thereto.
either of these two’main components.
2. A control valve according to claim ‘1 in which the
What we claim is:
blade side edge connecting portion is convex in the plane
1. A control valve comprising a body having a ?ow
of said blade.
passage therethrough, a portion of said body extending
3. A control valve according to claim 1 in which said
transversely from said passage to form a hollow branch
valve component is formed integrally of rigid material
having a cylindrical bore opening into said passage; a
and in which a sheath of resilient material covers the
valve component having a circular head rotatably
periphery of said head and the edges of said blade.
mounted in said bore and a blade carried by said head
References Cited in the ?le of this patent
and projecting across said passage and having side edges 25
which extend respectively from diametrically opposite
points ‘on the'periphery of said head and converge sym
metrically toward the axis of rotation of said head, the
converged ends of said side edges merging with a blade
side edge connecting portion remote from said head, 30 1,043,403
said body being formed internally adjacent said blade as
a surface of revolution corresponding to the pro?le of said
blade, the maximum dimension of said blade transversely
of the axis of rotation of said valve component being
smaller than the diameter of said bore whereby said 35
Callahan _____________ __ June 3,
Clark ______________ ._ Apr. 16,
Curtin _______________ __ Nov. 5,
Cochrane ____________ __ Sept. 24,
Ludwig ______________ .. Feb. 10,
Great Britain ________ __. May 20, 1949
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