Title of Invention	VALVE WITH METAL SEAL BETWEEN THE COUPLED PARTS OF ITS BODY
Abstract	This invention concerns a valve, in particular a ball valve, consisting of a body formed by at least two metal parts (11, 12) which screw onto one another, and where said parts of the body valve have their respective circular surfaces (13, 14), designed to match together when the parts are assembled. On the circular surfaces (13, 14) there are one or more circular surfaces (13, 14) there are one or more circular parts (15, 16) which fit together tightly, interacting and jointly forming a metal seal between the assembled parts.

Title of Invention

VALVE WITH METAL SEAL BETWEEN THE COUPLED PARTS OF ITS BODY

Abstract

This invention concerns a valve, in particular a ball valve, consisting of a body formed by at least two metal parts (11, 12) which screw onto one another, and where said parts of the body valve have their respective circular surfaces (13, 14), designed to match together when the parts are assembled. On the circular surfaces (13, 14) there are one or more circular surfaces (13, 14) there are one or more circular parts (15, 16) which fit together tightly, interacting and jointly forming a metal seal between the assembled parts.

Full Text	VALVE WITH METAL SEAL BETWEEN THE COUPLED PARTS OF ITS BODY This invention is directed to a valve with metal seal between the coupled parts of its body. This invention concerns valves with a body consisting of at least two metal parts, coupled together as in a ball valve that contains a rotating ball shutter and a valve gland screwed onto the body. In these valves, the hermetic seal between the coupled parts of the body is usually made by interposing gaskets in elastomeric material, which, anyway, represent additional elements that are added at the moment of assembling the valve, and which do not preclude problems of efficiency, maintenance, etc. The aim of this invention is to propose valves, in particular ball valves, with a metal seal between the two connected parts of their body and with the advantages of eliminating the usual added gaskets, of simplifying the assembly of the valves and ensuring an effective seal that lasts, under all conditions of use and with any fluid, whether liquid or gas. In other terms, the seal between the coupled metal parts is obtained by using portions of the same material with which those parts are made, and integral with them. Correspondingly, a valve according to the invention consists of a body composed of at least two metal parts that screw together and where, on the circular surfaces of said two parts designed to match when assembled, there are circular coupling sections that fit tightly together, fastening together and jointly giving a metal seal. The circular coupling parts may take various geometrical shapes and may, anyway, be made by working the corresponding interlocking surfaces. Several examples of models of a metal seal for the valve body are shown in the drawings enclosed, by way of example, and these will be described in greater detail below. In these drawings: Fig. 1 shows, in cross-section, the two separated parts of a valve body and in (A) and (B) the enlarged views of the parts designed to fit together to give a hermetic seal, according to a first version of the invention; Fig. 2 shows the assembled body valve and in (C) and (D) two enlarged areas seen before and after the two parts of the body valve have been fastened together; Figs 3, (A) and (B), show similar views to those of Figs 1, (A) and (B), but with a second version of the sealing parts; Figs 4, (C) and (D), show views similar to those of Figs 2, (C) and (D), with the presence of sealing parts like those of Figs 3, (A) and (B); and Figs 5 and 6, (A), (B), (C), (D); 7 and 8, (A), (B), (C), (D); 9 and 10, (A), (B), (C), (D); 11 and 12, (A), (B), (C), (D) show, respectively, similar views to those in Figs 1 and 2, (A), (B), (C), (D) but with further versions of the sealing parts. A valve body 10 for a ball valve as illustrated in the drawings consists of a real and proper body 11, designed to contain a rotating ball shutter, not shown, with relative gaskets and an element called a valve gland 12 which is screwed co-axially onto the body 11. The body 11 and the valve gland 12 have circular surfaces 13 and 14 which are designed to fit when they are tightly screwed together. At the height of said surfaces, there are one or more circular coupling parts 15 and 16, respectively, which match to give a metal seal between the body and the valve gland, once they are assembled. In the version shown in Figs 1 and 2, the matching circular surfaces 13, 14 are defined by opposing shoulders which come to rest against each other in an axial direction once the elements 11, 12 have been screwed together. The circular coupling parts for the metal seal consist of a throat 15 with converging sides made in one (13) of said circular surfaces and of a collar or prismatic circular projection 16 made on the other surface (14) and designed to catch in the throat 15. Likewise, in the version shown in Figs 3 and 4, the matching circular surfaces 13, 14 are defined by opposing shoulders, while the circular coupling parts for the metal seal consist of an inclined circular plane 15, made on one (13) of said surfaces and of a circular edge 16 made on the opposite surface (14) and designed to fit with the said inclined plane. Similarly, in the version shown in Figs 5 and 6, the matching circular surfaces 13, 14 are defined by opposing shoulders on the elements 11, 12, respectively, while the circular coupling parts for the metal seal are represented by a circular chamfer 15 made on one (13) of said surfaces and by a circular step 16 made on the opposite surface (14) and interacting and fastening by means of an edge against said chamfer 15. In the version shown in Figs 7 and 8, the matching circular surfaces 13, 14 of elements 11, 12 are also defined by opposing shoulders, while the circular coupling parts for the metal seal consist of a circular cuneiform projection 15 made on one (13) of said surfaces and of a circular throat 16 made in the opposite surface (14) in such a way that the cuneiform projection 15 rests against and holds, with its point, the bottom of said throat 16. In the example shown in Figs 9 and 10, the matching circular surfaces 13, 14 are foreseen, respectively, inside the body 11 at the end of the coupling thread and at the end of the valve gland 12 that screws onto the body. In this case, the circular coupling parts for the metal seal consist of a circular step 15 made on one (13) of said surfaces and of a chamfer 16 on the opposite surface 14, in such a way as to interlock when the body and the valve gland are assembled. Likewise, in the example shown in Figs 11 and 12 the matching circular surfaces 13,14 are inside the body 11 and at the end of the valve gland, respectively. The circular coupling parts are constituted here by an internal collar 15 made on the surface 13 and by a collar and circular boundary projection 16 on the surface 14, in such a way that said projection interacts with the collar 15 when the two components 11 and 12 are assembled. Clearly, other shapes can be chosen and adopted for the coupling parts in the metal seal between the components of the valve body while still adhering to the aim of the present invention, namely, getting two complementary metal parts to interlock tightly when said parts are assembled. WE CLAIM 1. A valve with metal seal between the coupled parts of its body comprising a body composed of atleast two metal parts (11, 12) screwed together characterized in that said parts of the body valve having respective circular surfaces (13, 14) fit together when the parts are assembled and atleast one circular coupling parts (15, 16) on said circular surfaces (13, 14) fit together tightly so as to develop a metal seal between the assembled parts. 2. A valve according to claim 1, in which said circular surfaces (13, 14) that are designed to fit together are defined by opposing shoulders made on said metal parts and which rest against each other in an axial direction when the parts (11, 12) of the valve body are assembled. 3. A valve according to claims 1 and 2, in which the circular coupling parts for the metal seal consist of a circular throat (15) with converging sides made on one of said surfaces (13) and a circular prismatic projection (16) on the opposite surface (14), designed to fit into said throat. 4. A valve according to claims 1 and 2, in which the circular coupling parts for the metal seal consist of an inclined circular plane (15) made in one of said surfaces (13) and a circular edge (16) on the opposite surface (14) designed to interlock with said inclined plane. 5. Valve according to claims 1 and 2, in which the circular coupling parts for the metal seal consist of a circular chamfer (15) on one of sad surfaces (13) and a circular step (16) on the opposite surface (14), which uses an edge to fasten on to said chamfer. 6. Valve according to claims 1 and 2, in which the circular coupling parts for the metal seal consist of a circular cuneiform projection (15) on one of said surfaces (13) and a circular throat (16) in the opposite surface (14), the point of said cuneiform projection (15) fitting into the bottom of said throat 7. Valve according to claim 1, in which said circular surfaces (13, 14), which are designed to match together, are inside one of the metal parts and at the end of the other metal part, respectively. 8. Valve according to claim 7, in which the circular coupling parts for the metal seal consist of at least one circular step (15) on one of said surfaces (13) and of a chamfer (16) on the opposite surface (14) against which said step (15) interacts with an edge. 9. Valve according to claim 7, in which the circular coupling parts for the metal seal consist of an internal collar (15) on one of said surfaces and of a circular peripheral projection on the opposite surface (14), designed to interact with said collar. This invention concerns a valve, in particular a ball valve, consisting of a body formed by at least two metal parts (11, 12) which screw onto one another, and where said parts of the body valve have their respective circular surfaces (13, 14), designed to match together when the parts are assembled. On the circular surfaces (13, 14) there are one or more circular surfaces (13, 14) there are one or more circular parts (15, 16) which fit together tightly, interacting and jointly forming a metal seal between the assembled parts.

Full Text

VALVE WITH METAL SEAL BETWEEN THE
COUPLED PARTS OF ITS BODY
This invention is directed to a valve with metal seal between the coupled
parts of its body. This invention concerns valves with a body consisting
of at least two metal parts, coupled together as in a ball valve that
contains a rotating ball shutter and a valve gland screwed onto the body.
In these valves, the hermetic seal between the coupled parts of the body
is usually made by interposing gaskets in elastomeric material, which,
anyway, represent additional elements that are added at the moment of
assembling the valve, and which do not preclude problems of efficiency,
maintenance, etc.
The aim of this invention is to propose valves, in particular ball valves,
with a metal seal between the two connected parts of their body and with
the advantages of eliminating the usual added gaskets, of simplifying the
assembly of the valves and ensuring an effective seal that

lasts, under all conditions of use and with any fluid, whether
liquid or gas. In other terms, the seal between the coupled
metal parts is obtained by using portions of the same
material with which those parts are made, and integral with
them.
Correspondingly, a valve according to the invention
consists of a body composed of at least two metal parts that
screw together and where, on the circular surfaces of said
two parts designed to match when assembled, there are
circular coupling sections that fit tightly together, fastening
together and jointly giving a metal seal.
The circular coupling parts may take various geometrical
shapes and may, anyway, be made by working the
corresponding interlocking surfaces.
Several examples of models of a metal seal for the valve
body are shown in the drawings enclosed, by way of
example, and these will be described in greater detail below.
In these drawings:
Fig. 1 shows, in cross-section, the two separated parts of
a valve body and in (A) and (B) the enlarged views of the
parts designed to fit together to give a hermetic seal,
according to a first version of the invention;
Fig. 2 shows the assembled body valve and in (C) and (D)
two enlarged areas seen before and after the two parts of the
body valve have been fastened together;

Figs 3, (A) and (B), show similar views to those of Figs
1, (A) and (B), but with a second version of the sealing
parts;
Figs 4, (C) and (D), show views similar to those of Figs
2, (C) and (D), with the presence of sealing parts like those
of Figs 3, (A) and (B); and
Figs 5 and 6, (A), (B), (C), (D); 7 and 8, (A), (B), (C),
(D); 9 and 10, (A), (B), (C), (D); 11 and 12, (A), (B), (C),
(D) show, respectively, similar views to those in Figs 1 and
2, (A), (B), (C), (D) but with further versions of the sealing
parts.
A valve body 10 for a ball valve as illustrated in the
drawings consists of a real and proper body 11, designed to
contain a rotating ball shutter, not shown, with relative
gaskets and an element called a valve gland 12 which is
screwed co-axially onto the body 11. The body 11 and the
valve gland 12 have circular surfaces 13 and 14 which are
designed to fit when they are tightly screwed together. At
the height of said surfaces, there are one or more circular
coupling parts 15 and 16, respectively, which match to give
a metal seal between the body and the valve gland, once
they are assembled.
In the version shown in Figs 1 and 2, the matching
circular surfaces 13, 14 are defined by opposing shoulders
which come to rest against each other in an axial direction

once the elements 11, 12 have been screwed together. The
circular coupling parts for the metal seal consist of a throat
15 with converging sides made in one (13) of said circular
surfaces and of a collar or prismatic circular projection 16
made on the other surface (14) and designed to catch in the
throat 15.
Likewise, in the version shown in Figs 3 and 4, the
matching circular surfaces 13, 14 are defined by opposing
shoulders, while the circular coupling parts for the metal
seal consist of an inclined circular plane 15, made on one
(13) of said surfaces and of a circular edge 16 made on the
opposite surface (14) and designed to fit with the said
inclined plane.
Similarly, in the version shown in Figs 5 and 6, the
matching circular surfaces 13, 14 are defined by opposing
shoulders on the elements 11, 12, respectively, while the
circular coupling parts for the metal seal are represented by
a circular chamfer 15 made on one (13) of said surfaces and
by a circular step 16 made on the opposite surface (14) and
interacting and fastening by means of an edge against said
chamfer 15.
In the version shown in Figs 7 and 8, the matching
circular surfaces 13, 14 of elements 11, 12 are also defined
by opposing shoulders, while the circular coupling parts for
the metal seal consist of a circular cuneiform projection 15

made on one (13) of said surfaces and of a circular throat 16
made in the opposite surface (14) in such a way that the
cuneiform projection 15 rests against and holds, with its
point, the bottom of said throat 16.
In the example shown in Figs 9 and 10, the matching
circular surfaces 13, 14 are foreseen, respectively, inside the
body 11 at the end of the coupling thread and at the end of
the valve gland 12 that screws onto the body. In this case,
the circular coupling parts for the metal seal consist of a
circular step 15 made on one (13) of said surfaces and of a
chamfer 16 on the opposite surface 14, in such a way as to
interlock when the body and the valve gland are assembled.
Likewise, in the example shown in Figs 11 and 12 the
matching circular surfaces 13,14 are inside the body 11 and
at the end of the valve gland, respectively. The circular
coupling parts are constituted here by an internal collar 15
made on the surface 13 and by a collar and circular
boundary projection 16 on the surface 14, in such a way that
said projection interacts with the collar 15 when the two
components 11 and 12 are assembled.
Clearly, other shapes can be chosen and adopted for the
coupling parts in the metal seal between the components of
the valve body while still adhering to the aim of the present
invention, namely, getting two complementary metal parts
to interlock tightly when said parts are assembled.

WE CLAIM
1. A valve with metal seal between the coupled parts of its body
comprising a body composed of atleast two metal parts (11, 12)
screwed together characterized in that said parts of the body
valve having respective circular surfaces (13, 14) fit together
when the parts are assembled and atleast one circular coupling
parts (15, 16) on said circular surfaces (13, 14) fit together
tightly so as to develop a metal seal between the assembled
parts.
2. A valve according to claim 1, in which said circular surfaces
(13, 14) that are designed to fit together are defined by opposing
shoulders made on said metal parts and which rest against
each other in an axial direction when the parts (11, 12) of the
valve body are assembled.
3. A valve according to claims 1 and 2, in which the circular
coupling parts for the metal seal consist of a circular throat (15)
with converging sides made on one of said surfaces (13) and a
circular prismatic projection (16) on the opposite surface (14),
designed to fit into said throat.
4. A valve according to claims 1 and 2, in which the circular
coupling parts for the metal seal consist of an inclined circular
plane (15) made in one of said surfaces (13) and a circular edge
(16) on the opposite surface (14)

designed to interlock with said inclined plane.
5. Valve according to claims 1 and 2, in which the circular
coupling parts for the metal seal consist of a circular
chamfer (15) on one of sad surfaces (13) and a circular
step (16) on the opposite surface (14), which uses an
edge to fasten on to said chamfer.
6. Valve according to claims 1 and 2, in which the circular
coupling parts for the metal seal consist of a circular
cuneiform projection (15) on one of said surfaces (13)
and a circular throat (16) in the opposite surface (14), the
point of said cuneiform projection (15) fitting into the
bottom of said throat
7. Valve according to claim 1, in which said circular
surfaces (13, 14), which are designed to match together,
are inside one of the metal parts and at the end of the
other metal part, respectively.
8. Valve according to claim 7, in which the circular
coupling parts for the metal seal consist of at least one
circular step (15) on one of said surfaces (13) and of a
chamfer (16) on the opposite surface (14) against which
said step (15) interacts with an edge.
9. Valve according to claim 7, in which the circular
coupling parts for the metal seal consist of an internal
collar (15) on one of said surfaces and of a circular
peripheral projection on the opposite surface (14),
designed to interact with said collar.

This invention concerns a valve, in particular a ball valve, consisting of a
body formed by at least two metal parts (11, 12) which screw onto one
another, and where said parts of the body valve have their respective
circular surfaces (13, 14), designed to match together when the parts are
assembled. On the circular surfaces (13, 14) there are one or more
circular surfaces (13, 14) there are one or more circular parts (15, 16)
which fit together tightly, interacting and jointly forming a metal seal
between the assembled parts.

Documents:

1392-kolnp-2003-granted-abstract.pdf

1392-kolnp-2003-granted-claims.pdf

1392-kolnp-2003-granted-correspondence.pdf

1392-kolnp-2003-granted-description (complete).pdf

1392-kolnp-2003-granted-drawings.pdf

1392-kolnp-2003-granted-examination report.pdf

1392-kolnp-2003-granted-form 1.pdf

1392-kolnp-2003-granted-form 18.pdf

1392-kolnp-2003-granted-form 2.pdf

1392-kolnp-2003-granted-form 26.pdf

1392-kolnp-2003-granted-form 3.pdf

1392-kolnp-2003-granted-form 5.pdf

1392-kolnp-2003-granted-reply to examination report.pdf

1392-kolnp-2003-granted-specification.pdf

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Patent Number

226733

Indian Patent Application Number

1392/KOLNP/2003

PG Journal Number

52/2008

Publication Date

26-Dec-2008

Grant Date

24-Dec-2008

Date of Filing

29-Oct-2003

Name of Patentee

RUBINETTERIE UTENSILERIE BONOMI S.R.L.

Applicant Address

VIA PADANA SUPERIORE 27, 29-1-25080 CILIVERGHE DI MAZZANO. BRESCIA

Inventors:

#	Inventor's Name	Inventor's Address
1	BONOMI LUCIANO	117/2 VIALE BORNATA - I 25123 BRESCIA
2	RABAIOLI SANDRO	12, VIA CIMABUE I 25134 BRESCIA
3	VALDESTURLO DANIELE	26, VIA MARTIRI DEI LAGER I 25014 CASTENEDOLO (BRESCIA)

PCT International Classification Number

F16K 5/06

PCT International Application Number

PCT/IT01/00233

PCT International Filing date

2001-05-14

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA