CA2152918C - Safety shut-off for gas lines - Google Patents
Safety shut-off for gas lines Download PDFInfo
- Publication number
- CA2152918C CA2152918C CA002152918A CA2152918A CA2152918C CA 2152918 C CA2152918 C CA 2152918C CA 002152918 A CA002152918 A CA 002152918A CA 2152918 A CA2152918 A CA 2152918A CA 2152918 C CA2152918 C CA 2152918C
- Authority
- CA
- Canada
- Prior art keywords
- valve
- sealing device
- valve body
- spring
- safety sealing
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
- F16L47/03—Welded joints with an electrical resistance incorporated in the joint
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Feeding And Controlling Fuel (AREA)
- Lift Valve (AREA)
- Control Of Combustion (AREA)
- Pipeline Systems (AREA)
- Pipe Accessories (AREA)
Abstract
The invention takes as its basis the problem of creating a safety sealing device for gas pipes by which the bearing of the valve body should be frictionless, require no maintenance and which causes only minimal flow resistance. Further the safety sealing device should not require outward sealing connections. It should be easy to install and able to be fitted into existing gas piping or fittings without having to change them.
The problem is solved in that with safety sealing devices with a valve body (6) which can be pressed against a valve seat (1), whereby the valve body (6) is supported so that it is movable in the axial direction of the valve seat (1) is against the force of a locking spring (8), the valve body is conducted only through a spring and is otherwise freely movable without additional support points.
The invention concerns a safety sealing device for closing gas conduits in cases of damage, e.g. pipe bursts or hose ruptures, in order to prevent an uncontrolled leakage of gas and thereby a dangerous situation.
The problem is solved in that with safety sealing devices with a valve body (6) which can be pressed against a valve seat (1), whereby the valve body (6) is supported so that it is movable in the axial direction of the valve seat (1) is against the force of a locking spring (8), the valve body is conducted only through a spring and is otherwise freely movable without additional support points.
The invention concerns a safety sealing device for closing gas conduits in cases of damage, e.g. pipe bursts or hose ruptures, in order to prevent an uncontrolled leakage of gas and thereby a dangerous situation.
Description
Ar~e~olme~ ~ s >?~sc.xiptiot 05 Safety sealing device for gas conduits Te.c.hr~ic.~,~...~.x'.ea The invention conce~.~ns a safety sealing device for gas conduits with a valve body and a v<~.lve seat according to the introductory part of the first patent claim.
These type of safety sealing devices serve, in cases of damage such as pipe bursts or hose ruptures, to seal the gas conduit in order to prevent an uncontrolled leakage of gas and thereby a dangerous situation.
State-of-the-art Safety sealing devices have already been known, which are arranged between the supply pipe and a user and which should ensure that, for example with pipe bursts or hose ruptures, sealing of the supply pipe is achieved.
Thus a safety sealing device known from by ~~rhich is US-PS 4,830,06 a 2o spherical valve bod~r, withinhousing havinga connectingthread at a both ends, can be pressed against a valve seat,whereby valve body the is movable in the axial dit~ecaionof the valve seat againstthe force of a spring in the closure direction.Whilst, in the valve the open body position, is supported on a circlip underthe action spring;
of a dmring its closing movement, it is controlled by this spring.
only With this solution ii: is disadvantageous that both the screw-in component serving as the cirrlip for the valve body in the open position and the screw-in component forming the s~.ipport for the spring create restrictors which prod~.ice an additional pressure loss. In order to guarantee the desired flow volcime, a larger construction dimensions have to be put up with. Thus there ar~~ further disadvantages in that due to the insertion of the valve in a gas :supply line, two new external sealin5 points are created and in that when Ame~el~.re~~fs 2- 21~29~-combining the safety sealing device with another fitting, e.g. a hose cock, its constructional len;~th is increased. When extending existing systems, it is 05 necessary to correspondingly shorten the existing gas supply line.
Seen as a whole, this thereby results in a extensiva device due to the connection threads and the components.
A further safety sealing device is described in WO 92/01184, which seals a piping system should it be damaged without however effecting a premature closure of the supply line should a mser need the amount of gas corresponding to its output over a longer period of time. With this safety sealing device, a valve is supported against the force of a spring such that it can slide in the a~;ial direction of a tubular shaped housing of a slidable plate valve. To achie~re this, discs with axial support positions for the plate valve are placed in the housing, the discs having penetrations for gas flow around their ci.rcumf~~rences. The housing has threads at both facing ends for connection to the piping or other fittings.
With this solution it is disadvantageous that the movement of the valve head is conducted through supports. Because the available standing pressure forces, which then in cases of damage act on the valve head for the closure movement, is only a few millibars, the spring's force, which determines the flow rate <xt which the safety sealing device should operate, is extraordinary little. Each support friction substantially falsifies this flow rate ans is not reproducible.
This disadvantage is especially serious when it is considered that the valve is not activated in normal operation and therefore no movement of the valve shaft ensues within the bearing, which is exposed to contamination due to the gas flow. The use of si.ich safety sealing devices is, amongst other things, intended however with gas pipes that are laid underground which means that they also have to retain their safety capabilities without maintenance over a longer period of time e.g. several decades.
It is a further disadvantage that with the installation of the valve in a gas pipe two new outward sealing points are made and that when combining the Amenvlmen~s 2~52918 safety device with another fitting, e.g. a hose cock, its constructional length is increased. 4~hen extending existing systems, it is necessary to 05 shorten the existing gas supply line correspondingly.
The penetrated discs which serve to bear the plate valve further create an additional pressure loss.
Seen as a whole, also with this solution, this thereby results in a extensive device due to the connection threads and the components.
De.scri.ption of...the, ir~~r,~n,ti.o.n The invention 'takes as its basis the problem of creating a safety sealing device for gas pipes by which the bearing of the valve body should be frictionless, require no maintenance and which causes only minimal flow resistance. Further i:he safety sealing device should not require outward sealing connections. It should be easy to install and able to be fitted into existing gas piping or fittings without having to change them.
According to the invention, the problem is solved in that the valve body is on the spring of freely suspended plate, which rests in the open position on a circlip elastically: deformable in the radial direction, «hich is itself latched into a notch, which is preferably connected in one piece with the valve seat. Due to the extremely log.- weight, this solution has the advantage that the occurring mass reaction, depending on the installation location which for example has influence on the deflection and balance of forces and therefore also on the clos~.ire process, is kept very low.
Advantageous refinements of the invention are taken from the further patent claims given later.
Thereby the circlip can be formed for example, by an expanding spring or a slit annular ring which preferably has three inward flanges distributed evenly around the circumference whereby the flow cross-section is reduced only immaterially.
AmendmPn~s - ~ -That thereby to enable adjustment without changing the flow cross-section, it is a proven advantage if the support shoulder of spring end facing the 05 valve body is adjustable in the axial direction in that it is connected, for example, to the valve seat by a thread. Due to this adjustable support shoulder, a possibility for adjusting the safety sealing device has been found which suffices without changing the flow cross-section.
Especially for use in connection with a commercial gas stopcock, it is an advantage if the safety sealing device is inserted in the gas inlet of the gas stopcock, whereby the plate of the safety sealing device has a lug-shaped extension on its side facing the spring in the axial direction, which protrudes from the s.~,me when the safety sealing device is closed whereas it is within the same when the safety sealing device is open. It is of course also possible that thEe valve seat made in one piece with the gas inlet of the gas stopcock. Thereby the safety sealing device is located so far inside the gas inlet that the lug-shaped extension protrudes into the swivel area of the closure member of the gas stopcock. With this solution the safety-sealing device can close completely sealed. A leakage flow bore for automatic re-opening of the gas stopcock is not necessary. With the closing of the gas stopcock, which is normally the case in damage repair, e.g replacing a hose, the lug-shaped extension is pushed in the axial direction ~,~hereby the safety sealing device is re-opened so that the gas can flozr again after damage repair and on opening the gas stopcock.
In another advantageous refinement, because the outer diameter of the valve body without elastic sealing element is smaller than inner diameter of the valve seat associated to it, whilst. the outer diameter of the valve body with the sealing element is larger than this inner diameter, and by this means, that a circmlar shoulder is connected to the inner diameter of the valve seat and itself' to a tubular end-piece in the flow direction, whose length is so dimensioned that a blocking element, with withdrawn sealing element, does not leave this tubiMar shaped end-piece in the closure direction of the safety sealing device, whereas with a missing sealing element, the valve body can be pressed so far into the valve seat that the blocking element protrudes out of the end-piece, the installation can be carried out very easily, in which the valve body together with the locking ~
~men~men ~s _ - ~ - 21~~918 spring, the sealing element not being fitted, is placed so far into the valve seat, that the blocking element can readily be connected to a lug belonging 05 to the valve boy in the flow direction. In conclusion, the installation of the sealing element is carried out.
It is an advantage that the lug is provided with a thread on which that for example, a wire clip .as blocking element is easily attached and is adjustable in the axial direction. of the lug for adjustment purposes.
Of course it also possible that the valve body is screwed on to the lug thread in the flow direction whilst the blocking element, resting on the shoulder of the valve seat, is rigidly attached to the lug thread.
Form. of., c.onstryctio.r~
Fo.~m.....o~...GP...n.S.G.xt-~Ct~On.
05 The invention is described in detail in the following form of construction.
There is:
Fig. 1 A safety sealing device for gas pipes (accordingthe invention) to in the open position, sectional view.
Fig. A safety sealing device for gas pipes {accordingthe invention) 2 to in the closed position, sectional view.
Fig. 3 A safety sealing device for gas pipes (accordingto the invention) before installation of the elastic sealing element Fig. 4 .a safety sealing devic,e for gas pipes (accordingthe invention) to in another verson, in the open position, sectional Vlew.
Fig. 5 A plan view A of s;~fety sealing device (accordingto the invention) from Fig. 4.
Fig. 6 A safety sealing device for gas pipes (accordingth.e invention) to in a further version, in the open position, sectional viem.
Fig. ~ safety sealing device for gas pipes (.accordingthe invention) i to in -3. fnrtr;er version c.~ith a freely suspendedbody- (6), valve in the ope:~ I~ositic~n, sectional vie~~-.
r i,. A plan view B of safety sealing device (accordingto the invention) from Fig. 7.
Fig. A plan view B of safety sealing device {accordingto the invention) from Fi j. 7 vrith a changed circlip for the spring.
Fig. 10 An adjr.rstable safety sealing de-ice for (according gas pipes to the invention) in a further version, in the open position, sectional vies.-.
Fig. 11 A safety sealing devi~~e for gas pipes (accordingthe invention) to in the gas inlet of a gas stopcock, iri the on.
closed positi Fig. 12 A safety sealing device for gas pipes (accordingthe invention) to in the gas inlet of a gas stopcock, in the forcedposition.
open Fig. 13 A safet;y sealing device for gas pipes (accordingto the invention) used in an electrc>-welded sleeve, in the on.
open positi Fig. A safety sealing device for gas pipes (accordingto the invention) integrated with an electro-welded sleeve, in the closed position.
Fig. 15 A circlip for application in an electro-welded.
sleeve 215'91$
-The safety sealing device fox' gas pipes, according to the invention, shown in Fig. 1 consists of a tu>r~ular shaped valve seat (1), which has at its outer 05 diameter, which is otherwise smaller than the inner diameter gas pipe (26) (not shown in different figures), a ring flange (2) whose diameter is on the other hand larger than the inner diameter of gas pipe (26). In order to guarantee an easy insertion of the safety sealing device, according to the invention, the ring flange (2) is advantageously provided with an insertion bevel {3). Further it is a proven advantage if the wing flange (2) is provided with a circular groove (4) on both sides in order to achieve a better elasticity by means of the enlarged height of the ring flange (2).
At its rear face, against the flow direction shown by an arrow, a sealing surface (5) is located in the form of a concave ball. A valve body (6), movable in the axial direction, is arranged within the valve seat ( 1 ) and has a ring shaped notch for the accommodation o.f a circular ring (7) serving as a sealing element. Thereby the valve body (6) and circular ring {7) dimensions are determined such that the outer diameter of valve body (6) without circular ring (7) is smaller than the inner diameter of its associated va.lwe seat (1) whilst the oi.zter diameter of the valve body (6) with mounted circc.zlar ring ( r ) is hr.rger i;h.~,n this inner diameter.
On the flow direction side of valve body (6), one of the valve bodies (6) is held supported in the open position by spring (8) preferably formed as a compression spring, which is supported at its other end by circular shoulder (9) v.~hich connector to valve body (6) with its associated inner circumference of valve seat ( 1 ).
For guiding spring (8), the valve body (6) has a circular collar (10) on which a lug (11) is connecaed in the flow direction. Lug (I1) has a throu.gh-hole (12) at its end which serves to accommodate a blocking element (13), in this case a rod (Fig. 1). There is the relationship between the length of lug (11) and the length of they tubular shaped end-piece (14) connected on shoulder (9), that tr..e blocking element (13) with mounted circular ring (7) does not leave this i,,ubular shaped end-piece (14) in the closed position of safety sealing device (Fig. 2) whereas without circular ring (7), the valve body (6) can be pressed so far into the valve seat (1) that the blocking element (13) protrudes out of the end piece (14) (Fig. 3).
21591.8 _g_ A somewhat different version is shown in Fig. 4. Hereby lug (11) is provided with a thread and a wire clip (15), which is formed such that it 05 can be screwed on i:o lug (11) (Fig. 5) and serves as blocking element (13).
In Fig. 6 a further version is shown. This solution differs from the previous version in that the valve body (6) and the lug (11) consist of two separate components whereby the val~~e body (6) has an a~ia.l threaded born (16) with which it is screwed on to the threaded lug (11) located in the flow direction upon which the supported blocking element (13) is rigidly attached to shoulder {9) of valve seat (1). In order to guarantee the necessary sealing and prevent twisting, an appropriate material, e.g. in this case a commercial P'CFE (polytetraflorethylene} tape (17) is located between lug (11) and the bore (16). In this version, an elastic sealing element is dispensed with. To achieve the desired sealing efficiency, valve body (6) is spherically shaped ~,vhilst the sealing surface (5) is executed as a bevel. To accommodate spring (8) a.nd at the same time to reduce mass, valve body (6) has additionally a recess (2'7).
In a further safety sealing dei-ice, according to the in~-ention shown in Fig.
7, the ring fl<~nge (2} found at. the end of val~-e seat (1) is made significantly stronger than form of construction described above, tvhereby it also has an insertion bevel (3). This type of valve seat (1) is especially suitable for the installation in gas pipes consisting of polyethylene as they are shown allusively under (26) in F'ig. 7. The safety sealing device is hereby installed i.n which the gas pipe (26), e. g. consisting of polyethylene pipe, is heated. The yielding component is in this case not the ring flange (2) but the gas pipe (26}.
The valve body consists of a freely suspended plate (18) on spring (8) which in the open position rests against an elastic radially deforrnable circlip. In this form of construction, the circlip consists of, as can easily be recognized in Fig. 8, an expanding spring (20) which is latched into a circular inner notch ( 19} of the valve seat ( 1 ).
It is obvious that instead of the expanding spring (20), other shaped circlips can also be used. For example in Fig. 9, the circlip is formed by a slit circular ring (24) which has preferably three inward flanges (25) _ g _ arranged regularly a:round the circumference. Thereby it is to be observed that the circlet surf~;ce area reducing the flow cross-section is to be kept 05 as low as possible.
A circular ring ('7) located on plate (18) serves to achieve the desired sealing efficiency, w'~ilst the sealing surface (5) of valve seat (1) is on the other hand constructed in the form of a concave ball.
Because gas piping of polyethylene tubing is generally underground and that the safety sealing device can only be reached with difficulty, the plate (18) has a leakage pore (23), which leads to a definitive and self-evident permissible leakage flow, whereby after repair of damage which caused the safety sealing device to close, the device re-opens itself. .
In Fig. 10, the safety sealing device already described in Fig. 7 is changed to the effect that the cir°clip shoulder (21), constructed as a separate component, is connected to valve seat (1) via a thread (22) and is thereby adjustable in the axial direction. Thus an adjustment is made possible which dispenses ~~-ith a change of the flow cross-section.
The use of the safety sealing device, according to the invention, in connection with a commercial gas stopcock (29) is shown in Figures 11 and 12. Whilst in Fig. 11, the safety sealing device is inserted in the gas inlet of the gas stop cocl.c, in Fig. 12 the valve seat ( 1 ) is constructed in one-piece with the gas inlet of the gas stopcock (29). In both constrr.rctions, plate (8) of the safei;y se;iling device has a lug-shaped extension (28) on its side facing spring (~c) in the axial direction, which protrudes from the safety sealing device when it is closed (Fig. 11), whereas in the open position of the safety sealing device the lug (28) is within it. Thereby the safety sealing device is arranged so far in the gas inlet that the lug-formed extension (28) protrudes into swivel range of the closure member (32) of the gas stopcock (29) when the safety sealing device is closed. With the closing of the gas stopcock (29), which usually takes place when damage occurs, the lug-shaped extension (28), whose end is correspondingly shaped, is pushed in the axial direction (Fig. 12), whereby the safety sealing device completely re-opens again due to the effects of spring (8), so that after darn<~ge repair gas flow can take place again when the gas stopcock (29) is opened.
05 With gas pipes (26) ~~onsisting of polyethylene tubing, connections are made in many cases by means of so-called electro-welded sleeves (30}. A safety sealing device advantageous for this case is shown in Figures 13 and 14.
Whilst in Fig. 13, the safety sealing device is inserted in the electro-welded sleeve (30}, in Fig. 14 the valve seat (1) is constructed in one-piece with the same. In order to realize the circlip (33) simply for the plate (8), the circular ring (24) which series as a circlip shown in Fig. 9 has teeth (34), which press into the elec;tro-welded sleeve, in addition to the flanges (25) distributed around the outer circumference.
As can be seen from both figures, the inner diameter of the safety sealing device can be enlarged, as they are located outside the gas pipe (26), whereby pressure reduction due to the safety sealing device can be minimized.
In order to keep the constructional increase in length, which is necessary in order to gi.ia.rantee the welding length used for connection with the gas pipe (26), small, it is an advantage if the safety sealing dei-ice has a detached collar (31 ) a.t i.ts o~.rtflow end, whose flow cross-section is otherwise larger than the flow cross-section in the plate area, whereby the outer diameter of the collar (3l.) is smaller than the inner diameter of the oas pipe (26).
It is obvious that the individual constri.ictions described in this paragraph lay no claim on completeness. For example it is possible that the individual components given in the above construction can be interchanged withomt leaving the claimed area of protection.
These type of safety sealing devices serve, in cases of damage such as pipe bursts or hose ruptures, to seal the gas conduit in order to prevent an uncontrolled leakage of gas and thereby a dangerous situation.
State-of-the-art Safety sealing devices have already been known, which are arranged between the supply pipe and a user and which should ensure that, for example with pipe bursts or hose ruptures, sealing of the supply pipe is achieved.
Thus a safety sealing device known from by ~~rhich is US-PS 4,830,06 a 2o spherical valve bod~r, withinhousing havinga connectingthread at a both ends, can be pressed against a valve seat,whereby valve body the is movable in the axial dit~ecaionof the valve seat againstthe force of a spring in the closure direction.Whilst, in the valve the open body position, is supported on a circlip underthe action spring;
of a dmring its closing movement, it is controlled by this spring.
only With this solution ii: is disadvantageous that both the screw-in component serving as the cirrlip for the valve body in the open position and the screw-in component forming the s~.ipport for the spring create restrictors which prod~.ice an additional pressure loss. In order to guarantee the desired flow volcime, a larger construction dimensions have to be put up with. Thus there ar~~ further disadvantages in that due to the insertion of the valve in a gas :supply line, two new external sealin5 points are created and in that when Ame~el~.re~~fs 2- 21~29~-combining the safety sealing device with another fitting, e.g. a hose cock, its constructional len;~th is increased. When extending existing systems, it is 05 necessary to correspondingly shorten the existing gas supply line.
Seen as a whole, this thereby results in a extensiva device due to the connection threads and the components.
A further safety sealing device is described in WO 92/01184, which seals a piping system should it be damaged without however effecting a premature closure of the supply line should a mser need the amount of gas corresponding to its output over a longer period of time. With this safety sealing device, a valve is supported against the force of a spring such that it can slide in the a~;ial direction of a tubular shaped housing of a slidable plate valve. To achie~re this, discs with axial support positions for the plate valve are placed in the housing, the discs having penetrations for gas flow around their ci.rcumf~~rences. The housing has threads at both facing ends for connection to the piping or other fittings.
With this solution it is disadvantageous that the movement of the valve head is conducted through supports. Because the available standing pressure forces, which then in cases of damage act on the valve head for the closure movement, is only a few millibars, the spring's force, which determines the flow rate <xt which the safety sealing device should operate, is extraordinary little. Each support friction substantially falsifies this flow rate ans is not reproducible.
This disadvantage is especially serious when it is considered that the valve is not activated in normal operation and therefore no movement of the valve shaft ensues within the bearing, which is exposed to contamination due to the gas flow. The use of si.ich safety sealing devices is, amongst other things, intended however with gas pipes that are laid underground which means that they also have to retain their safety capabilities without maintenance over a longer period of time e.g. several decades.
It is a further disadvantage that with the installation of the valve in a gas pipe two new outward sealing points are made and that when combining the Amenvlmen~s 2~52918 safety device with another fitting, e.g. a hose cock, its constructional length is increased. 4~hen extending existing systems, it is necessary to 05 shorten the existing gas supply line correspondingly.
The penetrated discs which serve to bear the plate valve further create an additional pressure loss.
Seen as a whole, also with this solution, this thereby results in a extensive device due to the connection threads and the components.
De.scri.ption of...the, ir~~r,~n,ti.o.n The invention 'takes as its basis the problem of creating a safety sealing device for gas pipes by which the bearing of the valve body should be frictionless, require no maintenance and which causes only minimal flow resistance. Further i:he safety sealing device should not require outward sealing connections. It should be easy to install and able to be fitted into existing gas piping or fittings without having to change them.
According to the invention, the problem is solved in that the valve body is on the spring of freely suspended plate, which rests in the open position on a circlip elastically: deformable in the radial direction, «hich is itself latched into a notch, which is preferably connected in one piece with the valve seat. Due to the extremely log.- weight, this solution has the advantage that the occurring mass reaction, depending on the installation location which for example has influence on the deflection and balance of forces and therefore also on the clos~.ire process, is kept very low.
Advantageous refinements of the invention are taken from the further patent claims given later.
Thereby the circlip can be formed for example, by an expanding spring or a slit annular ring which preferably has three inward flanges distributed evenly around the circumference whereby the flow cross-section is reduced only immaterially.
AmendmPn~s - ~ -That thereby to enable adjustment without changing the flow cross-section, it is a proven advantage if the support shoulder of spring end facing the 05 valve body is adjustable in the axial direction in that it is connected, for example, to the valve seat by a thread. Due to this adjustable support shoulder, a possibility for adjusting the safety sealing device has been found which suffices without changing the flow cross-section.
Especially for use in connection with a commercial gas stopcock, it is an advantage if the safety sealing device is inserted in the gas inlet of the gas stopcock, whereby the plate of the safety sealing device has a lug-shaped extension on its side facing the spring in the axial direction, which protrudes from the s.~,me when the safety sealing device is closed whereas it is within the same when the safety sealing device is open. It is of course also possible that thEe valve seat made in one piece with the gas inlet of the gas stopcock. Thereby the safety sealing device is located so far inside the gas inlet that the lug-shaped extension protrudes into the swivel area of the closure member of the gas stopcock. With this solution the safety-sealing device can close completely sealed. A leakage flow bore for automatic re-opening of the gas stopcock is not necessary. With the closing of the gas stopcock, which is normally the case in damage repair, e.g replacing a hose, the lug-shaped extension is pushed in the axial direction ~,~hereby the safety sealing device is re-opened so that the gas can flozr again after damage repair and on opening the gas stopcock.
In another advantageous refinement, because the outer diameter of the valve body without elastic sealing element is smaller than inner diameter of the valve seat associated to it, whilst. the outer diameter of the valve body with the sealing element is larger than this inner diameter, and by this means, that a circmlar shoulder is connected to the inner diameter of the valve seat and itself' to a tubular end-piece in the flow direction, whose length is so dimensioned that a blocking element, with withdrawn sealing element, does not leave this tubiMar shaped end-piece in the closure direction of the safety sealing device, whereas with a missing sealing element, the valve body can be pressed so far into the valve seat that the blocking element protrudes out of the end-piece, the installation can be carried out very easily, in which the valve body together with the locking ~
~men~men ~s _ - ~ - 21~~918 spring, the sealing element not being fitted, is placed so far into the valve seat, that the blocking element can readily be connected to a lug belonging 05 to the valve boy in the flow direction. In conclusion, the installation of the sealing element is carried out.
It is an advantage that the lug is provided with a thread on which that for example, a wire clip .as blocking element is easily attached and is adjustable in the axial direction. of the lug for adjustment purposes.
Of course it also possible that the valve body is screwed on to the lug thread in the flow direction whilst the blocking element, resting on the shoulder of the valve seat, is rigidly attached to the lug thread.
Form. of., c.onstryctio.r~
Fo.~m.....o~...GP...n.S.G.xt-~Ct~On.
05 The invention is described in detail in the following form of construction.
There is:
Fig. 1 A safety sealing device for gas pipes (accordingthe invention) to in the open position, sectional view.
Fig. A safety sealing device for gas pipes {accordingthe invention) 2 to in the closed position, sectional view.
Fig. 3 A safety sealing device for gas pipes (accordingto the invention) before installation of the elastic sealing element Fig. 4 .a safety sealing devic,e for gas pipes (accordingthe invention) to in another verson, in the open position, sectional Vlew.
Fig. 5 A plan view A of s;~fety sealing device (accordingto the invention) from Fig. 4.
Fig. 6 A safety sealing device for gas pipes (accordingth.e invention) to in a further version, in the open position, sectional viem.
Fig. ~ safety sealing device for gas pipes (.accordingthe invention) i to in -3. fnrtr;er version c.~ith a freely suspendedbody- (6), valve in the ope:~ I~ositic~n, sectional vie~~-.
r i,. A plan view B of safety sealing device (accordingto the invention) from Fig. 7.
Fig. A plan view B of safety sealing device {accordingto the invention) from Fi j. 7 vrith a changed circlip for the spring.
Fig. 10 An adjr.rstable safety sealing de-ice for (according gas pipes to the invention) in a further version, in the open position, sectional vies.-.
Fig. 11 A safety sealing devi~~e for gas pipes (accordingthe invention) to in the gas inlet of a gas stopcock, iri the on.
closed positi Fig. 12 A safety sealing device for gas pipes (accordingthe invention) to in the gas inlet of a gas stopcock, in the forcedposition.
open Fig. 13 A safet;y sealing device for gas pipes (accordingto the invention) used in an electrc>-welded sleeve, in the on.
open positi Fig. A safety sealing device for gas pipes (accordingto the invention) integrated with an electro-welded sleeve, in the closed position.
Fig. 15 A circlip for application in an electro-welded.
sleeve 215'91$
-The safety sealing device fox' gas pipes, according to the invention, shown in Fig. 1 consists of a tu>r~ular shaped valve seat (1), which has at its outer 05 diameter, which is otherwise smaller than the inner diameter gas pipe (26) (not shown in different figures), a ring flange (2) whose diameter is on the other hand larger than the inner diameter of gas pipe (26). In order to guarantee an easy insertion of the safety sealing device, according to the invention, the ring flange (2) is advantageously provided with an insertion bevel {3). Further it is a proven advantage if the wing flange (2) is provided with a circular groove (4) on both sides in order to achieve a better elasticity by means of the enlarged height of the ring flange (2).
At its rear face, against the flow direction shown by an arrow, a sealing surface (5) is located in the form of a concave ball. A valve body (6), movable in the axial direction, is arranged within the valve seat ( 1 ) and has a ring shaped notch for the accommodation o.f a circular ring (7) serving as a sealing element. Thereby the valve body (6) and circular ring {7) dimensions are determined such that the outer diameter of valve body (6) without circular ring (7) is smaller than the inner diameter of its associated va.lwe seat (1) whilst the oi.zter diameter of the valve body (6) with mounted circc.zlar ring ( r ) is hr.rger i;h.~,n this inner diameter.
On the flow direction side of valve body (6), one of the valve bodies (6) is held supported in the open position by spring (8) preferably formed as a compression spring, which is supported at its other end by circular shoulder (9) v.~hich connector to valve body (6) with its associated inner circumference of valve seat ( 1 ).
For guiding spring (8), the valve body (6) has a circular collar (10) on which a lug (11) is connecaed in the flow direction. Lug (I1) has a throu.gh-hole (12) at its end which serves to accommodate a blocking element (13), in this case a rod (Fig. 1). There is the relationship between the length of lug (11) and the length of they tubular shaped end-piece (14) connected on shoulder (9), that tr..e blocking element (13) with mounted circular ring (7) does not leave this i,,ubular shaped end-piece (14) in the closed position of safety sealing device (Fig. 2) whereas without circular ring (7), the valve body (6) can be pressed so far into the valve seat (1) that the blocking element (13) protrudes out of the end piece (14) (Fig. 3).
21591.8 _g_ A somewhat different version is shown in Fig. 4. Hereby lug (11) is provided with a thread and a wire clip (15), which is formed such that it 05 can be screwed on i:o lug (11) (Fig. 5) and serves as blocking element (13).
In Fig. 6 a further version is shown. This solution differs from the previous version in that the valve body (6) and the lug (11) consist of two separate components whereby the val~~e body (6) has an a~ia.l threaded born (16) with which it is screwed on to the threaded lug (11) located in the flow direction upon which the supported blocking element (13) is rigidly attached to shoulder {9) of valve seat (1). In order to guarantee the necessary sealing and prevent twisting, an appropriate material, e.g. in this case a commercial P'CFE (polytetraflorethylene} tape (17) is located between lug (11) and the bore (16). In this version, an elastic sealing element is dispensed with. To achieve the desired sealing efficiency, valve body (6) is spherically shaped ~,vhilst the sealing surface (5) is executed as a bevel. To accommodate spring (8) a.nd at the same time to reduce mass, valve body (6) has additionally a recess (2'7).
In a further safety sealing dei-ice, according to the in~-ention shown in Fig.
7, the ring fl<~nge (2} found at. the end of val~-e seat (1) is made significantly stronger than form of construction described above, tvhereby it also has an insertion bevel (3). This type of valve seat (1) is especially suitable for the installation in gas pipes consisting of polyethylene as they are shown allusively under (26) in F'ig. 7. The safety sealing device is hereby installed i.n which the gas pipe (26), e. g. consisting of polyethylene pipe, is heated. The yielding component is in this case not the ring flange (2) but the gas pipe (26}.
The valve body consists of a freely suspended plate (18) on spring (8) which in the open position rests against an elastic radially deforrnable circlip. In this form of construction, the circlip consists of, as can easily be recognized in Fig. 8, an expanding spring (20) which is latched into a circular inner notch ( 19} of the valve seat ( 1 ).
It is obvious that instead of the expanding spring (20), other shaped circlips can also be used. For example in Fig. 9, the circlip is formed by a slit circular ring (24) which has preferably three inward flanges (25) _ g _ arranged regularly a:round the circumference. Thereby it is to be observed that the circlet surf~;ce area reducing the flow cross-section is to be kept 05 as low as possible.
A circular ring ('7) located on plate (18) serves to achieve the desired sealing efficiency, w'~ilst the sealing surface (5) of valve seat (1) is on the other hand constructed in the form of a concave ball.
Because gas piping of polyethylene tubing is generally underground and that the safety sealing device can only be reached with difficulty, the plate (18) has a leakage pore (23), which leads to a definitive and self-evident permissible leakage flow, whereby after repair of damage which caused the safety sealing device to close, the device re-opens itself. .
In Fig. 10, the safety sealing device already described in Fig. 7 is changed to the effect that the cir°clip shoulder (21), constructed as a separate component, is connected to valve seat (1) via a thread (22) and is thereby adjustable in the axial direction. Thus an adjustment is made possible which dispenses ~~-ith a change of the flow cross-section.
The use of the safety sealing device, according to the invention, in connection with a commercial gas stopcock (29) is shown in Figures 11 and 12. Whilst in Fig. 11, the safety sealing device is inserted in the gas inlet of the gas stop cocl.c, in Fig. 12 the valve seat ( 1 ) is constructed in one-piece with the gas inlet of the gas stopcock (29). In both constrr.rctions, plate (8) of the safei;y se;iling device has a lug-shaped extension (28) on its side facing spring (~c) in the axial direction, which protrudes from the safety sealing device when it is closed (Fig. 11), whereas in the open position of the safety sealing device the lug (28) is within it. Thereby the safety sealing device is arranged so far in the gas inlet that the lug-formed extension (28) protrudes into swivel range of the closure member (32) of the gas stopcock (29) when the safety sealing device is closed. With the closing of the gas stopcock (29), which usually takes place when damage occurs, the lug-shaped extension (28), whose end is correspondingly shaped, is pushed in the axial direction (Fig. 12), whereby the safety sealing device completely re-opens again due to the effects of spring (8), so that after darn<~ge repair gas flow can take place again when the gas stopcock (29) is opened.
05 With gas pipes (26) ~~onsisting of polyethylene tubing, connections are made in many cases by means of so-called electro-welded sleeves (30}. A safety sealing device advantageous for this case is shown in Figures 13 and 14.
Whilst in Fig. 13, the safety sealing device is inserted in the electro-welded sleeve (30}, in Fig. 14 the valve seat (1) is constructed in one-piece with the same. In order to realize the circlip (33) simply for the plate (8), the circular ring (24) which series as a circlip shown in Fig. 9 has teeth (34), which press into the elec;tro-welded sleeve, in addition to the flanges (25) distributed around the outer circumference.
As can be seen from both figures, the inner diameter of the safety sealing device can be enlarged, as they are located outside the gas pipe (26), whereby pressure reduction due to the safety sealing device can be minimized.
In order to keep the constructional increase in length, which is necessary in order to gi.ia.rantee the welding length used for connection with the gas pipe (26), small, it is an advantage if the safety sealing dei-ice has a detached collar (31 ) a.t i.ts o~.rtflow end, whose flow cross-section is otherwise larger than the flow cross-section in the plate area, whereby the outer diameter of the collar (3l.) is smaller than the inner diameter of the oas pipe (26).
It is obvious that the individual constri.ictions described in this paragraph lay no claim on completeness. For example it is possible that the individual components given in the above construction can be interchanged withomt leaving the claimed area of protection.
Claims (12)
1. A safety sealing device for gas pipes comprising a valve body (6), which can be pressed against a valve seat (1), whereby the valve body (6) which is guided only through a spring (8) and is otherwise freely movable without additional support points, and is movable in the axial direction of the valve seat (1) in the closure direction against the force of said spring (8), and the valve body (6) is a freely suspended plate (18) which is supported by a spring in the open position against a circlip which is elastically deformable in the radial direction and is latched into a notch (19) formed in the valve seat (1), characterized in that the plate (18) has a lug-shaped extension (28) on its side facing said spring (8) in the axial direction, which protrudes out of the safety sealing device in the closed position and which remains within the same in the open position, said lug shaped extension being accessible externally of said safety sealing device to enable resetting of said valve body to said open position.
2. A safety sealing device for gas pipes according to claim 1, characterized in that the valve seat (1) is integrally formed with the gas inlet of a gas stopcock (29).
3. A safety sealing device for gas pipes according to claim 1, further including a circlip shoulder for the end of the spring (8) facing the valve body (6), said circlip shoulder being threadedly connected to said valve seat and adjustable in the axial direction.
4. A safety sealing device for gas pipes according to claim 1, characterized in that the circlip is formed by a split circular ring (24) which has three radial flanges (25) extending inwards distributed evenly around its circumference.
5. A valve incorporating a safety sealing device for gas pipes comprising:
a housing;
a valve cavity within said housing;
an inlet passage within said housing for admitting fluid into said cavity;
a rotary valve member within said valve cavity, said rotary valve member having a fluid passage therethrough, said rotary valve member being movable between a first position in which said valve fluid passage is in fluid communication with said inlet passage and a second position in which said valve fluid passage is out of fluid communication with said inlet passage;
a valve seat provided within said inlet passage;
a valve body freely movably disposed within said inlet passage;
a biasing member within said inlet passage, said biasing member urging said valve body into an open position against a stop provided in said inlet passage;
said valve body being movable to a closed position in response to excessive fluid flow through said inlet passage and including a projection extending axially therefrom in the direction of movement of said valve body from said open position to said closed position, said extension being operative to reset said valve body to said open position in response to movement of said rotary valve member into said second position.
a housing;
a valve cavity within said housing;
an inlet passage within said housing for admitting fluid into said cavity;
a rotary valve member within said valve cavity, said rotary valve member having a fluid passage therethrough, said rotary valve member being movable between a first position in which said valve fluid passage is in fluid communication with said inlet passage and a second position in which said valve fluid passage is out of fluid communication with said inlet passage;
a valve seat provided within said inlet passage;
a valve body freely movably disposed within said inlet passage;
a biasing member within said inlet passage, said biasing member urging said valve body into an open position against a stop provided in said inlet passage;
said valve body being movable to a closed position in response to excessive fluid flow through said inlet passage and including a projection extending axially therefrom in the direction of movement of said valve body from said open position to said closed position, said extension being operative to reset said valve body to said open position in response to movement of said rotary valve member into said second position.
6. A safety sealing device for gas pipes according to claim 5 wherein said safety sealing device is positioned within said inlet.
7. A safety sealing device for gas pipes according to claim 6 wherein said fluid shut off valve is provided within said housing.
8. A safety sealing device for gas pipes according to claim 5 wherein said stop comprises a spring clip seated within said housing.
9. A safety sealing device for gas pipes according to claim 5 further comprising a spring seat within said housing, and said biasing member comprises a spring extending between said seat and said valve member.
10. A safety sealing device for gas pipes according to claim 9 wherein the distance between said spring seat and said valve body when said valve is in said open position is adjustable.
11. A safety sealing device for gas pipes comprising a valve body (6), which can be pressed against a valve seat (1), whereby the valve body (6) which is guided only through a spring (8) and is otherwise freely movable without additional support points, and is movable in the axial direction of the valve seat (1) in the closure direction against the force of spring (8), a circlip shoulder threadedly connected to said valve seat, said circlip shoulder being adjustable in the axial direction, said valve body (6) being a freely suspended plate (18) which is supported by a spring in the open position against a circlip which is elastically deformable in the radial direction and is latched into a notch (19) formed in the valve seat (1), characterized in that the plate (18) has a lug-shaped extension (28) on its side facing said spring (8) in the axial direction, which protrudes out of the safety sealing device in the closed position and which remains within the same in the open position, said lug shaped extension being accessible externally of said safety sealing device to enable resetting of said valve body to said open position.
12. A safety sealing device for gas pipes comprising:
a housing;
a valve seat provided within said housing;
a valve body freely movably disposed within said housing;
a spring seat within said housing;
a spring within said housing extending between said spring seat and said valve body, said spring urging said valve body into an open position against a stop provided in said housing, the distance between said spring seat and said valve body when said valve is in an open position is adjustable;
said valve body being movable to a closed position in response to excessive fluid flow through said housing and including a projection extending axially therefrom in the direction of movement of said valve member from said open position to said closed position, said extension being operative to enable resetting of said valve member to said open position.
a housing;
a valve seat provided within said housing;
a valve body freely movably disposed within said housing;
a spring seat within said housing;
a spring within said housing extending between said spring seat and said valve body, said spring urging said valve body into an open position against a stop provided in said housing, the distance between said spring seat and said valve body when said valve is in an open position is adjustable;
said valve body being movable to a closed position in response to excessive fluid flow through said housing and including a projection extending axially therefrom in the direction of movement of said valve member from said open position to said closed position, said extension being operative to enable resetting of said valve member to said open position.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4300432.6 | 1993-01-09 | ||
| DE19934300432 DE4300432A1 (en) | 1993-01-09 | 1993-01-09 | Safety shut=off for gas pipes |
| DE9319910U DE9319910U1 (en) | 1993-12-24 | 1993-12-24 | Electric welding socket |
| DE4344575A DE4344575A1 (en) | 1993-01-09 | 1993-12-24 | Safety closing device for gas conduits |
| PCT/EP1993/003686 WO1994016255A2 (en) | 1993-01-09 | 1993-12-24 | Safety shut-off for gas lines |
| DEG9319910.4U | 1993-12-24 | ||
| DEP4344575.6 | 1993-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2152918A1 CA2152918A1 (en) | 1994-07-21 |
| CA2152918C true CA2152918C (en) | 2000-06-20 |
Family
ID=27204647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002152918A Expired - Fee Related CA2152918C (en) | 1993-01-09 | 1993-12-24 | Safety shut-off for gas lines |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0678178B1 (en) |
| JP (1) | JPH08505212A (en) |
| AT (1) | ATE146263T1 (en) |
| BG (1) | BG99721A (en) |
| CA (1) | CA2152918C (en) |
| FI (1) | FI953367A0 (en) |
| HU (1) | HUT72339A (en) |
| NO (1) | NO952684L (en) |
| PL (1) | PL309782A1 (en) |
| RO (1) | RO117730B1 (en) |
| SK (1) | SK87495A3 (en) |
| WO (1) | WO1994016255A2 (en) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6199584B1 (en) | 1997-12-23 | 2001-03-13 | Whetstone Group International, Inc. | Fluid flow control valve |
| US6263911B1 (en) | 1997-12-23 | 2001-07-24 | Whetstone Group International, Inc. | Fluid flow control valve |
| US6260575B1 (en) | 1997-12-23 | 2001-07-17 | Whetstone Group International, Inc. | Fluid flow control valve |
| NL1011596C1 (en) * | 1998-06-30 | 2000-01-04 | Watts Ocean B V | Flow limiter. |
| DE102004032236B4 (en) * | 2004-07-02 | 2007-08-30 | FITR-Gesellschaft für Innovation im Tief- und Rohrleitungsbau Weimar mbH | Safety shut-off device, namely flow switch |
| US8905063B2 (en) | 2011-12-15 | 2014-12-09 | Honeywell International Inc. | Gas valve with fuel rate monitor |
| US9835265B2 (en) | 2011-12-15 | 2017-12-05 | Honeywell International Inc. | Valve with actuator diagnostics |
| US8899264B2 (en) | 2011-12-15 | 2014-12-02 | Honeywell International Inc. | Gas valve with electronic proof of closure system |
| US8839815B2 (en) | 2011-12-15 | 2014-09-23 | Honeywell International Inc. | Gas valve with electronic cycle counter |
| US8947242B2 (en) | 2011-12-15 | 2015-02-03 | Honeywell International Inc. | Gas valve with valve leakage test |
| US9995486B2 (en) | 2011-12-15 | 2018-06-12 | Honeywell International Inc. | Gas valve with high/low gas pressure detection |
| US9074770B2 (en) | 2011-12-15 | 2015-07-07 | Honeywell International Inc. | Gas valve with electronic valve proving system |
| US9846440B2 (en) | 2011-12-15 | 2017-12-19 | Honeywell International Inc. | Valve controller configured to estimate fuel comsumption |
| US9851103B2 (en) | 2011-12-15 | 2017-12-26 | Honeywell International Inc. | Gas valve with overpressure diagnostics |
| US9557059B2 (en) | 2011-12-15 | 2017-01-31 | Honeywell International Inc | Gas valve with communication link |
| US9234661B2 (en) | 2012-09-15 | 2016-01-12 | Honeywell International Inc. | Burner control system |
| US10422531B2 (en) | 2012-09-15 | 2019-09-24 | Honeywell International Inc. | System and approach for controlling a combustion chamber |
| EP2868970B1 (en) | 2013-10-29 | 2020-04-22 | Honeywell Technologies Sarl | Regulating device |
| US10024439B2 (en) | 2013-12-16 | 2018-07-17 | Honeywell International Inc. | Valve over-travel mechanism |
| US9841122B2 (en) | 2014-09-09 | 2017-12-12 | Honeywell International Inc. | Gas valve with electronic valve proving system |
| US9645584B2 (en) | 2014-09-17 | 2017-05-09 | Honeywell International Inc. | Gas valve with electronic health monitoring |
| US10503181B2 (en) | 2016-01-13 | 2019-12-10 | Honeywell International Inc. | Pressure regulator |
| US10564062B2 (en) | 2016-10-19 | 2020-02-18 | Honeywell International Inc. | Human-machine interface for gas valve |
| US11073281B2 (en) | 2017-12-29 | 2021-07-27 | Honeywell International Inc. | Closed-loop programming and control of a combustion appliance |
| US10697815B2 (en) | 2018-06-09 | 2020-06-30 | Honeywell International Inc. | System and methods for mitigating condensation in a sensor module |
| US10823206B2 (en) | 2018-07-31 | 2020-11-03 | Emerson Process Management Regulator Technologies, Inc. | Vent limiting device for use with fluid regulators |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL80781C (en) * | ||||
| GB556863A (en) * | 1941-05-16 | 1943-10-26 | Acrotorque Co | Improvements relating to automatic shut-off valves |
| US2996077A (en) * | 1958-05-08 | 1961-08-15 | Norman S Blodgett | Check valve |
| FR1204375A (en) * | 1958-10-08 | 1960-01-26 | Cie De Pont Amousson | Flow and pressure regulator |
| FR1409416A (en) * | 1964-07-16 | 1965-08-27 | Tech D Etudes Et Fournitures I | Flow-limiting valve connection |
| DE1600685A1 (en) * | 1967-05-24 | 1970-01-08 | Auto Union Gmbh | Check valve assembly |
| DE2503779A1 (en) * | 1975-01-30 | 1976-08-05 | Bosch Gmbh Robert | DEVICE FOR CLEANING VEHICLE WINDOWS |
| US4105044A (en) * | 1976-11-15 | 1978-08-08 | Ward Aero, Inc. | Flow check valve with bias spring removal capability |
| JPS5917305B2 (en) * | 1978-12-19 | 1984-04-20 | 日信工業株式会社 | Hose with check valve |
| JPS57193489U (en) * | 1981-06-03 | 1982-12-08 | ||
| FR2606454B1 (en) * | 1986-11-06 | 1990-04-20 | Peugeot | NON-RETURN VALVE FOR PRESSURE LIQUID CIRCUIT IN AN INTERNAL COMBUSTION ENGINE, AND ENGINE EQUIPPED WITH SUCH A VALVE |
| DE8705359U1 (en) * | 1987-04-10 | 1987-08-27 | F + H Schweisstechnische Sicherheitsgeraete Gmbh, 5466 Neustadt, De | |
| US4727903A (en) * | 1987-06-26 | 1988-03-01 | Malcolm B. Sturgis | Fluid shutoff valve |
| US4830046A (en) * | 1988-04-22 | 1989-05-16 | Hose Specialties/Capri, Inc. | Excess flow control valve |
| DE8815392U1 (en) * | 1988-12-10 | 1989-03-30 | Schmalz, Kurt, Dr., 7296 Glatten, De | |
| YU48550B (en) * | 1990-07-06 | 1998-11-05 | Pipelife Rohrsysteme Gesellschaft M.B.H. | Safety shut-off device for gas pipelines comprising valve |
-
1993
- 1993-12-24 JP JP6515642A patent/JPH08505212A/en active Pending
- 1993-12-24 CA CA002152918A patent/CA2152918C/en not_active Expired - Fee Related
- 1993-12-24 HU HU9502069A patent/HUT72339A/en unknown
- 1993-12-24 PL PL93309782A patent/PL309782A1/en unknown
- 1993-12-24 EP EP94903873A patent/EP0678178B1/en not_active Expired - Lifetime
- 1993-12-24 SK SK874-95A patent/SK87495A3/en unknown
- 1993-12-24 AT AT94903873T patent/ATE146263T1/en not_active IP Right Cessation
- 1993-12-24 WO PCT/EP1993/003686 patent/WO1994016255A2/en active IP Right Grant
- 1993-12-24 RO RO95-01269A patent/RO117730B1/en unknown
-
1995
- 1995-06-14 BG BG99721A patent/BG99721A/en unknown
- 1995-07-06 NO NO952684A patent/NO952684L/en unknown
- 1995-07-07 FI FI953367A patent/FI953367A0/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO952684D0 (en) | 1995-07-06 |
| PL309782A1 (en) | 1995-11-13 |
| EP0678178B1 (en) | 1996-12-11 |
| WO1994016255A2 (en) | 1994-07-21 |
| NO952684L (en) | 1995-07-06 |
| EP0678178A1 (en) | 1995-10-25 |
| FI953367A (en) | 1995-07-07 |
| FI953367A0 (en) | 1995-07-07 |
| WO1994016255A3 (en) | 1994-09-01 |
| HUT72339A (en) | 1996-04-29 |
| SK87495A3 (en) | 1995-11-08 |
| JPH08505212A (en) | 1996-06-04 |
| CA2152918A1 (en) | 1994-07-21 |
| ATE146263T1 (en) | 1996-12-15 |
| HU9502069D0 (en) | 1995-08-28 |
| RO117730B1 (en) | 2002-06-28 |
| BG99721A (en) | 1996-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20131224 |