WO2002053956A1 - Improved valve for gas systems - Google Patents

Improved valve for gas systems Download PDF

Info

Publication number
WO2002053956A1
WO2002053956A1 PCT/EP2001/015363 EP0115363W WO02053956A1 WO 2002053956 A1 WO2002053956 A1 WO 2002053956A1 EP 0115363 W EP0115363 W EP 0115363W WO 02053956 A1 WO02053956 A1 WO 02053956A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
ball valve
clamping nut
valve according
improved ball
Prior art date
Application number
PCT/EP2001/015363
Other languages
French (fr)
Inventor
Luca Giacomini
Original Assignee
Giacomini S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giacomini S.P.A. filed Critical Giacomini S.P.A.
Priority to EP01986942A priority Critical patent/EP1346171B1/en
Priority to DE60122576T priority patent/DE60122576T2/en
Priority to CA2401774A priority patent/CA2401774C/en
Priority to US10/220,351 priority patent/US6789782B2/en
Publication of WO2002053956A1 publication Critical patent/WO2002053956A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0647—Spindles or actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/6851—With casing, support, protector or static constructional installations
    • Y10T137/7043—Guards and shields
    • Y10T137/7062—Valve guards
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8811—Frangible

Definitions

  • the present invention relates to an improved ball valve, specifically designed for domestic and industrial gas systems, according to the preamble of claim 1.
  • Ball valves in general, and in particular for domestic and industrial gas systems can optionally comprise tampering indicating means, designed to clearly indicate a possible tampering of the valve manual operating elements, such as operating knobs, levers or the like, which will be hereinafter generically called “driving lever”, and which are coupled to a screw element for rotatively driving a valve ball shutter, by geometrically engaging it, and being clamped on said screw element by a clamping threaded nut engaged on a free threaded end portion of the screw element.
  • driving lever a screw element for rotatively driving a valve ball shutter, by geometrically engaging it, and being clamped on said screw element by a clamping threaded nut engaged on a free threaded end portion of the screw element.
  • a geometric fitting is usually performed by providing two parallel and opposite flat portions at the free threaded end of the screw element and a corresponding opening, having parallel sides coupled by portions of a circumference of a diameter corresponding to the screw outer diameter, through the lever, so as to engage the clamping nut on said threaded portions of the screw.
  • two free chambers closed at the bottom by the lever and freely communicating at the top thereof with the outside, will be formed.
  • the outer threaded end of the screw is moreover formed with a blind hole which, upon assembling, is left free.
  • the second approach provides to use a nut housing therein, at its outer end, a plastic material ring which, upon threading the nut on the screw, is self-threaded on the screw to be clearly seen from the outside.
  • the plastic material ring which is properly colored, disengages therefrom to clearly indicate its tampering.
  • the aim of the present invention is to provide a ball valve in which it would be very easy to visually show possible tamperings thereof.
  • Claim 2 discloses a very simple embodiment of the invention, having a single anchoring cavity and providing an easily visually detectable anti- tampering seal, anchored in a reliable manner.
  • Claim 3 discloses a first modified embodiment including a double anchoring cavity.
  • Claim 4 discloses a triple anchoring chamber, providing a very reliable anchoring or clamping of the valve anti-tampering indicating means.
  • the outer portion of the anti-tampering means or seal extends through the overall outer face of the clamping nut, thereby it can be clearly univocally seen.
  • the anchoring cavities provided herein have a small height thereby conventional or depressed clamping nuts can be used.
  • a plastic material or a low melting metal or metal alloy such as alead, tin alloy, can be used as the injectable or molding material.
  • the invention provides a lot of important advantages, such as a visually clear indication of a tampering. Moreover, upon tearing away, the anti-tampering seal cannot be reconstructed thereby providing a permanent tampering indication. While the herein proposed anchoring cavities can be suitably dimensioned and shaped appropriately depending on their molding material, it is advantageously possible to use the cavities already existing in prior ball valves, so as to use them either fully or partially as anchoring cavities for anchoring the injected material therein.
  • a further advantage is that the subject anti-tampering seals are firmly clamped in the cavities housing the molding material which, during the injection molding operation, will fill in any undercuts formed by the clamping nut thread and/or any slots formed in the screw centering blind hole, or the roughness of said anchoring cavities.
  • the molding material can comprise any desired plastic materials or low melting metals or metal alloys.
  • Yet another advantage is that the injection molding of said filling material is advantageously performed after having fully assembled and possibly tested the valve, thereby the anti-tampering seal also assure a perfectly reliable operation of the valve.
  • the injection head or injection molding head, has a simple bush shape and is removably fitted, by a geometrical type of engagement, on the valve locking nut screw assembly.
  • Figure 1 is a vertical longitudinal sectional view of an improved ball valve according to the present invention, taken along the cross-sectional plane 1-1 of figure 2;
  • Figure 2 is a further cross-sectional view taken along the section plane ii-ii of figure 1;
  • Figure 3 illustrates, on an enlarged scale, the detail A of figure 2;
  • Figure 4 is a top plan view of the valve of figures 1 to 3;
  • Figure 4 A is a detail top view showing the end portion of the drive lever of the ball valve of figures 1 to 4;
  • Figure 4B shows a detail like that of figure 4 A of a simplified modified embodiment of the geometrical fitting of the drive lever and valve screw;
  • Figure 5 is a perspective view illustrating the valve of figures 1 to 4;
  • Figure 6 is a detail perspective view illustrating the clamping nut/screw assembly of figure 5, and the tampering seal therefor;
  • Figure 7 illustrates a detail like that of figure 6, showing a modified embodiment of the anti-tampering seal.
  • a prior ball valve 1 for example a gas ball valve, it comprises a valve body 2 having an inlet 3 and an outlet 4, or vice-versa, and a chamber 6 arranged therebetween for housing therein a ball shutter 7 having a throughgoing hole 8 supported by opposite gaskets 9 and engageable by a driving screw 11 thereon can be assembled, by a geometrical type of engagement, a drive lever 12 to be clamped on said screw 11 by a clamping nut 13.
  • the latter comprises, in the shown embodiment, two opposite flat portions 14, 16, while the lever 12 comprises a corresponding recess 17, see figure 4 A.
  • an axial blind hole 19 is moreover provided at the threaded end portion 18 of the screw 11 .
  • Said screw 11 and lever 12 can also be geometrically mated by using a single flat portion on the screw, for example the flat portion 14, to provide the recess 17A in the lever 12 with the configuration shown in figure 4B.
  • Said engagement of the screw 11 and lever 12 can also be made without providing flat portions on the screw 11, but merely a throughgoing pin orthogonally passing through the engagement end portion of the lever 12 and the screw 11, in a not shown manner.
  • the invention provides to include therein an anti-tampering seal, specifically designed for indicating an occurred tampering, which is formed in anchoring or clamping cavities which advantageously can be either already formed in said valves or can be specifically formed.
  • the subject anti-tampering seal 25 is formed by injecting an injectable or molding material into at least a cavity of the assembly formed by the threaded end portion 18 of the screw 11 and clamping nut 13, which at least an anchoring cavity can comprise the axial blind hole 19.
  • the anchoring cavity further comprises two opposite cavities 21, 22 adjoining said blind hole 19, said cavities 19, 21 and 22 being all outward opened.
  • FIG. 3 shows moreover that the top 27 of the injection head 26 allows to provide the seal 25 with an outer portion 29, in the form of a disc cap, which substantially cover the overall outer face of the nut 13.
  • the injection head 26 forms a downward directed extension 29A of the cap 29, thereby providing a cup configuration, which will be much more visually apparent than that of a seal 25 having a dome outer portion 29, as shown in figure 6.
  • the injection of said injectable material will be performed by conventional plastic material or metal material injection molding methods, for example for injecting lead, tin or alloys thereof, i.e. low-melting metals, thereby the injecting molding apparatus and methods will not be herein disclosed in further details since they are well known to one skilled in the art.
  • the firm anchoring provided by the invention also allows to reduce the height of prior nuts 13 including a plastic material ring 13 A, or use conventional or recessed nuts, thereby reducing the heights of the anchoring cavities 19, 21 and 22 and that of the threaded portion of the screw 18 with a consequent decreasing of the material amount and machining steps for forming the screw.
  • the anti-tampering seal 25 can also be made on an already assembled and tested valve, thereby providing a very reliable valve.
  • This visual detection capability can be further enhanced by using a properly colored molding material, contrasting with the color of the lever 12 or valve body 2.
  • the improved ball valves according to the present invention can also be used in any application fields, such as in hydro-thermal-sanitary systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Taps Or Cocks (AREA)
  • Flow Control (AREA)
  • Check Valves (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

An improved ball valve (1), in particular for gas systems, comprises a tampering indicating seal (25) made by injection molding a synthetic or metal material into cavities (19; 21; 22) formed in the screw-clamping nut assembly (11, 13) and including a cap outer portion (29) which substantially covers the surface of the outer face of the nut (13) and/or extending (29A) on the side surface of said nut (13).

Description

IMPROVED VALVE FOR GAS SYSTEMS
Background of the invention
The present invention relates to an improved ball valve, specifically designed for domestic and industrial gas systems, according to the preamble of claim 1.
Ball valves in general, and in particular for domestic and industrial gas systems, can optionally comprise tampering indicating means, designed to clearly indicate a possible tampering of the valve manual operating elements, such as operating knobs, levers or the like, which will be hereinafter generically called "driving lever", and which are coupled to a screw element for rotatively driving a valve ball shutter, by geometrically engaging it, and being clamped on said screw element by a clamping threaded nut engaged on a free threaded end portion of the screw element.
The above mentioned a geometric fitting is usually performed by providing two parallel and opposite flat portions at the free threaded end of the screw element and a corresponding opening, having parallel sides coupled by portions of a circumference of a diameter corresponding to the screw outer diameter, through the lever, so as to engage the clamping nut on said threaded portions of the screw. In particular, after having assembled and locked the lever by the nut, between the inner circumference of said nut and said screw flat portions, two free chambers, closed at the bottom by the lever and freely communicating at the top thereof with the outside, will be formed.
For meeting machining accuracy requirements, the outer threaded end of the screw is moreover formed with a blind hole which, upon assembling, is left free.
Starting from the above disclosed prior art ball valve construction, two approaches for indicating a possible tampering have now been herein devised, the first of which provides to apply a colored paint drop or strip extending from a point of the nut side surface to the adjoining underlying driving lever, thereby a tampering of the lever, i.e. an unthreading of the nut, would cause an visually detectable breaking of the paint drop or strip.
However, in actual practice, such a visual detection of the paint drop or strip breakings is hindered both by the small surface of the paint drop or strip and by the fact that said breaking usually consists of a thin cross slit which, upon re-screwing the nut, would be not longer apparent.
The main drawback of this approach, however, is mat, the tampering can be easily concealed by simply applying a further paint strip or drop on the broken slit.
The second approach, being adopted by the Applicant, provides to use a nut housing therein, at its outer end, a plastic material ring which, upon threading the nut on the screw, is self-threaded on the screw to be clearly seen from the outside. Thus, upon unthreading said nut, the plastic material ring, which is properly colored, disengages therefrom to clearly indicate its tampering.
The above mentioned approaches, moreover, can be hardly standardized by some Foreign State Authorities, for example based on the European standard En 331/1998 stating a lot of requirements on visually showing possible tamperings in ball valve.
Summary of the invention
Accordingly, the aim of the present invention is to provide a ball valve in which it would be very easy to visually show possible tamperings thereof.
The above mentioned aim is achieved, according to the invention, by a ball valve having the features of claim 1.
Further advantageous embodiments are disclosed in the dependent claims.
Claim 2 discloses a very simple embodiment of the invention, having a single anchoring cavity and providing an easily visually detectable anti- tampering seal, anchored in a reliable manner.
Claim 3 discloses a first modified embodiment including a double anchoring cavity.
Claim 4 discloses a triple anchoring chamber, providing a very reliable anchoring or clamping of the valve anti-tampering indicating means. As disclosed in claim 5, the outer portion of the anti-tampering means or seal extends through the overall outer face of the clamping nut, thereby it can be clearly univocally seen.
This vision facility and clearness is further improved by the solution claimed in claim 6.
As disclosed in claim 7, the anchoring cavities provided herein have a small height thereby conventional or depressed clamping nuts can be used.
As disclosed in claim 8, a plastic material or a low melting metal or metal alloy, such as alead, tin alloy, can be used as the injectable or molding material.
As disclosed in claim 9, it is possible to clearly visually detect a performed tampering.
Thus it should be apparent that the invention provides a lot of important advantages, such as a visually clear indication of a tampering. Moreover, upon tearing away, the anti-tampering seal cannot be reconstructed thereby providing a permanent tampering indication. While the herein proposed anchoring cavities can be suitably dimensioned and shaped appropriately depending on their molding material, it is advantageously possible to use the cavities already existing in prior ball valves, so as to use them either fully or partially as anchoring cavities for anchoring the injected material therein.
A further advantage is that the subject anti-tampering seals are firmly clamped in the cavities housing the molding material which, during the injection molding operation, will fill in any undercuts formed by the clamping nut thread and/or any slots formed in the screw centering blind hole, or the roughness of said anchoring cavities.
A further advantage is that, the molding material can comprise any desired plastic materials or low melting metals or metal alloys. By using conventional or recessed nuts, it is moreover possible to reduce the height of the screw threaded portion, to provide a corresponding reduction of the required material amount. Even if small, such a material saving would be very important in a large series making said ball valves.
Yet another advantage is that the injection molding of said filling material is advantageously performed after having fully assembled and possibly tested the valve, thereby the anti-tampering seal also assure a perfectly reliable operation of the valve.
Yet another advantage is that the injection head, or injection molding head, has a simple bush shape and is removably fitted, by a geometrical type of engagement, on the valve locking nut screw assembly.
Brief description of the drawings
Further characteristics, advantages and details of the improved ball valve according to the present invention will become more apparent hereinafter from the following disclosure of some embodiments thereof, which are shown, by way of an example, in the accompanying drawings, where: Figure 1 is a vertical longitudinal sectional view of an improved ball valve according to the present invention, taken along the cross-sectional plane 1-1 of figure 2;
Figure 2 is a further cross-sectional view taken along the section plane ii-ii of figure 1;
Figure 3 illustrates, on an enlarged scale, the detail A of figure 2;
Figure 4 is a top plan view of the valve of figures 1 to 3;
Figure 4 A is a detail top view showing the end portion of the drive lever of the ball valve of figures 1 to 4;
Figure 4B shows a detail like that of figure 4 A of a simplified modified embodiment of the geometrical fitting of the drive lever and valve screw;
Figure 5 is a perspective view illustrating the valve of figures 1 to 4;
Figure 6 is a detail perspective view illustrating the clamping nut/screw assembly of figure 5, and the tampering seal therefor; and
Figure 7 illustrates a detail like that of figure 6, showing a modified embodiment of the anti-tampering seal.
Description of the preferred embodiments
Through the figures, like parts have been indicated by like reference numbers.
With reference to a prior ball valve 1, for example a gas ball valve, it comprises a valve body 2 having an inlet 3 and an outlet 4, or vice-versa, and a chamber 6 arranged therebetween for housing therein a ball shutter 7 having a throughgoing hole 8 supported by opposite gaskets 9 and engageable by a driving screw 11 thereon can be assembled, by a geometrical type of engagement, a drive lever 12 to be clamped on said screw 11 by a clamping nut 13.
As shown in figure 4, for geometrically engaging said lever 12 and screw 11, the latter comprises, in the shown embodiment, two opposite flat portions 14, 16, while the lever 12 comprises a corresponding recess 17, see figure 4 A.
At the threaded end portion 18 of the screw 11 an axial blind hole 19 is moreover provided .Upon assembling the clamping or locking nut 13 on the threaded end portion 18, between said screw 13 and flat portions 14, 16 of the screw 11, two chambers 21, 22, closed at the bottom by the top side of the lever 12 and, leading, at the top thereof, to the outside, are formed.
Said screw 11 and lever 12 can also be geometrically mated by using a single flat portion on the screw, for example the flat portion 14, to provide the recess 17A in the lever 12 with the configuration shown in figure 4B.
Said engagement of the screw 11 and lever 12 can also be made without providing flat portions on the screw 11, but merely a throughgoing pin orthogonally passing through the engagement end portion of the lever 12 and the screw 11, in a not shown manner.
Starting from the above disclosed prior art valves, the invention provides to include therein an anti-tampering seal, specifically designed for indicating an occurred tampering, which is formed in anchoring or clamping cavities which advantageously can be either already formed in said valves or can be specifically formed.
Reference is made at first to the anti-tampering seal provided for valves of the type shown in figures 1 to 5.
According to the invention, the subject anti-tampering seal 25 is formed by injecting an injectable or molding material into at least a cavity of the assembly formed by the threaded end portion 18 of the screw 11 and clamping nut 13, which at least an anchoring cavity can comprise the axial blind hole 19. In the shown embodiment, the anchoring cavity further comprises two opposite cavities 21, 22 adjoining said blind hole 19, said cavities 19, 21 and 22 being all outward opened. Thus, by providing an injection head 26 adapted to be fitted on the clamping nut 13 and having a dome top 27, said cavities 19, 21 and 22 will be held in a communicating relationship. Accordingly, by injecting an injectable material into said chambers, they will be continuously filled in by said injectable material which, during the injection, will occupy the cut-outs formed, for example at the thread portions of said chambers 21 and 22 and possible annular slots 28 formed in the axial blind hole 19, as shown in figure 3. Figure 3 shows moreover that the top 27 of the injection head 26 allows to provide the seal 25 with an outer portion 29, in the form of a disc cap, which substantially cover the overall outer face of the nut 13.
In the embodiment shown in figure 7, the injection head 26 forms a downward directed extension 29A of the cap 29, thereby providing a cup configuration, which will be much more visually apparent than that of a seal 25 having a dome outer portion 29, as shown in figure 6.
The teaching of the invention of forming an anti-tampering seal 25 including three anchoring cavities, can be obviously also applied to valves having anchoring cavities of different number and/or configuration, or to a different type of geometric fitting, as shown, for example in figure 4B.
In actual practice, anyhow, the injection of said injectable material will be performed by conventional plastic material or metal material injection molding methods, for example for injecting lead, tin or alloys thereof, i.e. low-melting metals, thereby the injecting molding apparatus and methods will not be herein disclosed in further details since they are well known to one skilled in the art.
Finally, it should be pointed out that the firm anchoring provided by the invention also allows to reduce the height of prior nuts 13 including a plastic material ring 13 A, or use conventional or recessed nuts, thereby reducing the heights of the anchoring cavities 19, 21 and 22 and that of the threaded portion of the screw 18 with a consequent decreasing of the material amount and machining steps for forming the screw.
It should be moreover apparent that the anti-tampering seal 25 can also be made on an already assembled and tested valve, thereby providing a very reliable valve.
In operation, an unthreading of the locking nut 13, or a tampering of the valve 1, will break the seal 25, to detach its outer portion, having a cap shape in the illustrated embodiment, thereby rendering clearly visually detectable said tampering.
This visual detection capability can be further enhanced by using a properly colored molding material, contrasting with the color of the lever 12 or valve body 2.
From the above constructional and functional disclosure, it should be apparent that the invention allows to efficiently solve the above mentioned aim and achieve the mentioned advantages. In actual practice, in addition to using the above mentioned anchoring cavities, it would be also possible to provide further anchoring cavities in the screw/anchoring nut assembly, for example by forming a cross hole passing tlirough the nut and screw, in a not shown manner, or providing the cap portion with different shapes, without departing from the scope of the invention.
In addition to gas system ball valves, the improved ball valves according to the present invention can also be used in any application fields, such as in hydro-thermal-sanitary systems.

Claims

Claims
1. An improved ball valve, in particular for gas systems, comprising a valve body with an inlet and an outlet and a chamber arranged between said inlet and outlet for housing a ball actuator supported by opposite gaskets and adapted to be engaged by a driving screw thereon is mounted, by a geometrical type of engagement, a drive lever, which can be locked on said screw by a clamping nut, characterized in that in at least an anchoring cavity (19; 21; 22), provided either individually or in combination in the assembly formed by the threaded end portion (18) of the screw (11) and the clamping nut (13), an injectable molding material tampering indicating seal (25) is formed which is injected into said at least a cavity (19; 21; 22) and having a well visible, i.e. large surface, outer portion (29).
2. An improved ball valve according to Claim 1, characterized in that said anchoring cavity is formed by an axial blind hole (19) extending in said threaded end portion (18) of the screw (11) and leading to the outside.
3. An improved ball valve according to Claims 1 and 2, characterized in that said anchoring cavity further comprises at least a further cavity (21 or 22) adjoining said axial hole (19) and formed between an outer flat portion (14 or 16) of the screw (11) and the inner threaded surface of the clamping nut (13) clamped on said screw (11).
4. An improved ball valve according to Claims 1 and 2, characterized in that said anchoring cavity further comprises two adjoining and opposite cavities (21, 22) formed by two outer opposite flat portions (14, 16) of said screw and the inner threaded surfaced of said clamping nut (13) clamped on said screw (11).
5. An improved ball valve according to one or more of the preceding claims, characterized in that the well visible outer portion of the tampering indicating seal (25) has a cap disc-like shape (29) substantially covering the outer face of said clamping nut (13).
6. An improved ball valve according to Claim 5, characterized in that said disc-like cap (29) downward perimetrically extends on said clamping nut (13).
7. An improved ball valve according to one or more of the preceding claims, characterized in that said clamping nut (13) comprises either a conventional or a recessed clamping nut.
8. An improved ball valve according to one or more of the preceding claims, characterized in that said material, to be applied by injection molding methods or the like methods, comprises a plastic material or a low melting metal or metal alloy such as tin, lead or alloys thereof.
9. An improved ball valve according to one or more of the preceding claims, characterized in that said material forming said tampering indicating seal (25) is colored in a color contrasting against the color of said drive lever (12) and/or said valve body (2).
PCT/EP2001/015363 2000-12-29 2001-12-28 Improved valve for gas systems WO2002053956A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01986942A EP1346171B1 (en) 2000-12-29 2001-12-28 Improved valve for gas systems
DE60122576T DE60122576T2 (en) 2000-12-29 2001-12-28 TAP FOR GAS SYSTEM
CA2401774A CA2401774C (en) 2000-12-29 2001-12-28 Improved valve for gas systems
US10/220,351 US6789782B2 (en) 2000-12-29 2001-12-28 Valve for gas systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITCO00A000027 2000-12-29
IT2000CO000027A ITCO20000027A1 (en) 2000-12-29 2000-12-29 BALL VALVE PERFECTED IN PARTICULAR FOR GAS SYSTEMS.

Publications (1)

Publication Number Publication Date
WO2002053956A1 true WO2002053956A1 (en) 2002-07-11

Family

ID=11441222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/015363 WO2002053956A1 (en) 2000-12-29 2001-12-28 Improved valve for gas systems

Country Status (9)

Country Link
US (1) US6789782B2 (en)
EP (1) EP1346171B1 (en)
CN (1) CN1294373C (en)
AT (1) ATE337505T1 (en)
CA (1) CA2401774C (en)
DE (1) DE60122576T2 (en)
IT (1) ITCO20000027A1 (en)
PL (1) PL199575B1 (en)
WO (1) WO2002053956A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115556B (en) * 2001-05-23 2005-05-31 Naval Oy Process for producing a ball valve between two pipes
US20100155642A1 (en) * 2008-06-18 2010-06-24 Victaulic Company Offset Handle and Dual Connected Handle and Valves
WO2019064262A1 (en) * 2017-09-28 2019-04-04 Effebi S.P.A. Component for a fluidic circuit and valve comprising said component
PL233243B1 (en) * 2017-10-20 2019-09-30 Arka Spolka Z Ograniczona Odpowiedzialnoscia Spolka Komandytowa Universal valve
CN109083919A (en) * 2018-10-18 2018-12-25 湘电风能有限公司 A kind of locking sealing device of threaded connection pair and method
US20210055023A1 (en) * 2019-08-21 2021-02-25 The Boeing Company Vapor cycle machine availability for high impact applications

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2098298A (en) * 1981-05-08 1982-11-17 Lucas Ind Plc Tamper-proofing
EP0300403A1 (en) * 1987-07-20 1989-01-25 Giacomini S.p.A. Profiled sealing gasket for stopcocks with ball valves
DE4002926A1 (en) * 1990-02-01 1991-08-08 Bosch Gmbh Robert Safety valve with variable operating pressure - has adjusting screw and lock-nut enclosed in close-fitting plastics housing

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467796A (en) * 1995-03-24 1995-11-21 Hydronic Components, Inc. Ball valve with a strainer and integrated means for flushing the strainer
CN2263252Y (en) * 1996-03-01 1997-09-24 吉林市新城建筑材料厂 Valve with lock
JPH10231823A (en) * 1997-02-20 1998-09-02 Kitz Corp Looseness preventing device for gland nut of valve
CN2367862Y (en) * 1999-03-15 2000-03-08 王永刚 Valve with lock
US6467500B2 (en) * 2000-04-19 2002-10-22 Mueller Co. Ball valve locking device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2098298A (en) * 1981-05-08 1982-11-17 Lucas Ind Plc Tamper-proofing
EP0300403A1 (en) * 1987-07-20 1989-01-25 Giacomini S.p.A. Profiled sealing gasket for stopcocks with ball valves
DE4002926A1 (en) * 1990-02-01 1991-08-08 Bosch Gmbh Robert Safety valve with variable operating pressure - has adjusting screw and lock-nut enclosed in close-fitting plastics housing

Also Published As

Publication number Publication date
CN1447884A (en) 2003-10-08
CA2401774C (en) 2010-03-23
ITCO20000027A0 (en) 2000-12-29
PL199575B1 (en) 2008-10-31
DE60122576D1 (en) 2006-10-05
EP1346171A1 (en) 2003-09-24
ITCO20000027A1 (en) 2002-06-29
DE60122576T2 (en) 2007-10-04
EP1346171B1 (en) 2006-08-23
US6789782B2 (en) 2004-09-14
ATE337505T1 (en) 2006-09-15
PL366121A1 (en) 2005-01-24
CA2401774A1 (en) 2002-07-11
US20030173534A1 (en) 2003-09-18
CN1294373C (en) 2007-01-10

Similar Documents

Publication Publication Date Title
US2927495A (en) Composite self-sealing washer
EP1346171B1 (en) Improved valve for gas systems
US6920896B2 (en) Visual position indicator for valves with linear moving valve stem
EP0032038A1 (en) Improved rotary plug valve
US7522112B2 (en) Roof antenna with protected access to a fastener through the cover
US7021153B2 (en) Measuring device
JP2015531875A (en) Device for adjusting the orientation of screw-in elements of timers
BRPI1003609B1 (en) screw seal
RU2403693C2 (en) Housing cover for switching electromagnet
US3040796A (en) Free run on sealing lock nut
US2339255A (en) Fluid-tight closure means
CN1044160A (en) Non-lifting type stem valve and replacing permanent seal installation method
CN1165930C (en) Control knob
CN1126890C (en) Valve for overhauling air conditioner
JP4121508B2 (en) Nut assembly, method of manufacturing nut assembly, and mold for molding nut assembly
CN1020968C (en) Watch comprising means for lateral positioning of movement in watch case
EP0468713A1 (en) Edge encapsulated panel and process for producing the same
US3882884A (en) Tamperproof open bottom stop assemblies
US10612697B2 (en) Press seal with pressing body
EP3726107B1 (en) Valve for fluids with anti-fraud locking device which can be operated with a special dedicated tool
JP4456684B2 (en) Cylinder valve with remaining amount indicator
CN2244651Y (en) Spring self-sealing tap
AU603270B2 (en) Method of forming window in electrolytic tank of storage battery for monitoring condition of electrolyte
CN203082296U (en) Waterway channel pressure safety control valve of water-cooled machine
JPH04300411A (en) Manufacture of hub nut

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AT BG CA CN CZ DE DE DK DK ES FI FI GB GE HR HU IN LU MX NO PL PT RO RU SE SI SK SK TR UA US YU

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

WWE Wipo information: entry into national phase

Ref document number: 2401774

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2001986942

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 018084745

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 10220351

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 2001986942

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWG Wipo information: grant in national office

Ref document number: 2001986942

Country of ref document: EP