Pressure breaking system between two premises

Abstract

The invention relates to a pressure breaking system of an access door, the access door being intended for the passage of a user and being configured to maintain a pressure seal of a gas, such as air, between two zones, the system comprising a duct allowing the gas to pass from one zone to the other and having a through-opening, the system being configured such that the closure device is kinematically coupled to the handle of the access door so that the manipulation of the handle by the user into the open position causes the system to pass from a first configuration to a second configuration.

Description

[0001] “Pressure relief system between two rooms”

[0002] TECHNICAL FIELD OF THE INVENTION

[0003] The present invention relates to the field of adjoining technical rooms with different pressures and where access from one to the other is possible. The invention will find particular application in systems for opening airtight doors, for example for clean rooms.

[0004] STATE OF THE ART

[0005] Many technical installations contain areas under negative or positive pressure. These include, for example, clean rooms, nuclear facilities, or pharmaceutical laboratories.

[0006] The pressure difference between these rooms and the outside environment is likely to generate a pressure force on the access doors to these rooms. This force can be external or internal to the room depending on whether they are under negative pressure or overpressure. It is therefore sometimes difficult or even impossible to open an access door to a technical room. To overcome this situation, one solution is to provide a device such as a lever to increase the opening force. However, this requires a significant effort that is not within everyone's reach.

[0007] There are also solutions for equalizing pressure on both sides of the door using screw devices. Some of these solutions involve manipulating a cover using a screw-nut connection to create an opening that allows air to flow from the space with the higher pressure to the space with the lower pressure. Another type of solution based on equalizing pressure involves breaking a window, whether glass or plastic, for example using a blunt object.

[0008] These devices are generally complex to operate and are not very intuitive. Indeed, in the event of an emergency evacuation, this type of system requires prior training because its use cannot be improvised.

[0009] There are also systems that can be operated by the door handle. Systems of this type are described in JP H04 102691, KR 2016 0050611, JP 2010 156146. These solutions are relatively complex, unreliable and expensive to implement.

[0010] An object of the present invention is therefore to propose a solution which makes it possible to eliminate or limit at least one of the aforementioned drawbacks.

[0011] There is therefore a need for an intuitive solution to improve the actuation of a system for unlocking an access door to a room on which pressure is exerted.

[0012] Other objects, features, and advantages of the present invention will become apparent from the following description and accompanying drawings. It is understood that other advantages may be incorporated.

[0013] SUMMARY OF THE INVENTION

[0014] To achieve this objective, according to one embodiment, a system, called a "pressure release system", of an access door is provided, the access door being intended for the passage of a user and being configured to maintain a pressure seal of a gas, such as air, between two zones, the system comprising an opening allowing the passage of gas from one zone to the other and having a passage orifice.

[0015] The system is configured to be kinematically coupled to a handle for actuating the opening of said access door. It comprises a closure device comprising a transmission member and at least one cover, the transmission member being configured so as to allow the cover to move under the effect of actuation of the handle by the user, thus driving the system from a first configuration in which the cover completely obstructs the passage orifice, in a gas-tight manner, so as to maintain a pressure differential between the first and second zones, to a second configuration in which the cover element does not completely obstruct the passage orifice so as to allow gas to pass through the passage orifice, thus allowing pressure balancing between the two zones.

[0016] The system being configured such that the shutter device is kinematically coupled to the handle such that manipulation of the handle by the user to the open position causes the system to transition from the first configuration to the second configuration.

[0017] Without the present invention, it would be necessary to achieve pre-emptive pressure equalization of the two rooms before opening the door. This action could be carried out using a screw system. However, it would be time-consuming to operate, and thus, the present invention makes it possible to avoid a tedious or complex operation in the event of an emergency evacuation of rooms through the access door.

[0018] In addition, a trapdoor or a cat flap could be used, but these solutions would not be compatible with the fire-resistant nature of fire doors.

[0019] As a result, the present invention allows a user to open the access door between two rooms almost immediately and intuitively while at the same time creating equal pressure between the two rooms separated by the access door.

[0020] Furthermore, the claimed system is particularly robust and reliable. It can be easily integrated into all types of doors, including fire doors. Furthermore, it has a limited cost.

[0021] Another aspect relates to an assembly comprising an access door and the system according to any one of the preceding claims.

[0022] The system can be integrated into the thickness of the access door wall.

[0023] According to one example, the system comprises a housing attached to one face of the door. Alternatively, the system is entirely enclosed between a first face of the door and a second face of the door. It is thus entirely housed between the two faces of the door. Each face of the door faces one of the rooms separated by the door. BRIEF DESCRIPTION OF THE FIGURES

[0024] The aims, objects, as well as the characteristics and advantages of the invention will emerge more clearly from the detailed description of an embodiment thereof which is illustrated by the following accompanying drawings in which:

[0025] Figure 1A shows an example according to the present invention of a pressure relief system positioned on an access door.

[0026] Figure 1B shows a side view of the example of Figure 1A.

[0027] Figure 1C shows a perspective view of an exemplary system according to the present invention.

[0028] Figures 2A and 2B respectively show top and side views of an exemplary system according to the present invention.

[0029] Figures 2C and 2D represent cross-sectional views of the system shown in Figures 2A and 2B in a first configuration.

[0030] Figure 2E shows a perspective view of an exemplary system including a housing.

[0031] Figures 3A and 3B show cross-sectional views of the system shown in Figures 2A and 2B in a second configuration.

[0032] Figures 3C and 3D represent cross-sectional views of the system shown in Figures 3A and 3B in the second configuration.

[0033] Figure 3E shows a perspective view of an exemplary system including a housing.

[0034] The drawings are given by way of example and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily to the scale of practical applications.

[0035] DETAILED DESCRIPTION OF THE INVENTION

[0036] Before commencing a detailed review of embodiments of the invention, optional features which may possibly be used in combination or alternatively are set out below:

[0037] According to one example, the system is configured to be carried by the door. According to one example, the actuation of the handle is carried out by rotation about a first axis.

[0038] According to one example, the first axis is directed perpendicular to a plane in which one face of the access door mainly extends.

[0039] According to one example, the first axis is offset relative to the passage orifice.

[0040] According to one example, the first axis is directed parallel to a plane in which one face of the access door mainly extends.

[0041] According to one example, the transmission member comprises: a first lever extending between a first proximal end and a first distal end and being configured so as to be secured to the handle, at its first proximal end, a second lever having a second proximal end and a second distal end such that at its second proximal end, the second lever is in pivot connection with the first proximal end of the first lever along a second axis, substantially parallel to the first axis. Furthermore, at its second distal end, the second lever is secured to the cover. This securing may comprise a pivot connection, in this case, the second lever is articulated in rotation with the cover along a third axis.

[0042] In one example, the system includes a tilt lever configured to allow displacement of the cache in a plane normal to a first transverse axis, the first transverse axis being substantially orthogonal to the first axis. In one example, the tilt lever is configured to allow displacement of the cache, the displacement comprising a component in a plane normal to a first transverse axis, the first transverse axis being substantially orthogonal to the first axis and preferably vertical.

[0043] According to one example, the tilting lever comprises a third proximal end and a third distal end, the tilting lever being configured to articulate in rotation at the third proximal end relative to the passage orifice, along a first transverse axis substantially parallel to a plane along which the wall of the access door extends, the tilting lever being secured to the cover at the third distal end. According to one example, the system comprises an elastic device, configured to allow the system to be returned from the second configuration to the first configuration.

[0044] According to one example, the system comprises a housing comprising a cavity capable of at least partially housing the transmission member so as to make it manually inaccessible from at least one of the two zones.

[0045] According to one example, the housing comprises a fastening portion fixed relative to the door and the elastic device is secured both to the cover and to the fastening portion.

[0046] According to one example, the housing comprises a hollow conduit whose envelope is complementary to the internal wall of the passage orifice so as to allow the positioning of the system relative to the access door by at least partial penetration of the hollow conduit inside the passage orifice, a gas being able to circulate through the conduit.

[0047] According to one example, the cover penetrates at least partially inside the passage hole.

[0048] In one example, the system is integrated into the thickness of the access door.

[0049] Maintaining a gas pressure seal between two zones means maintaining a pressure differential between these two zones, of plus or minus 10%, preferably plus or minus 4%, over a period of one hour. Maintaining the gas pressure seal between two zones can also be assessed by the difference between two measured pressure values ​​AP. The two pressure values ​​can be measured at different points in each of the two zones. Thus, the AP can represent a spatial pressure difference.

[0050] The performance of the device will be all the more relevant as the AP is high.

[0051] A conduit shutter will be understood to mean an element comprising at least one surface whose dimension allows the total sealing of a section of the conduit.

[0052] In the remainder of the description, the term "on" does not necessarily mean "directly on". Thus, when it is indicated that a part or member A is supported "on" a part or member B, this does not mean that the parts or members A and B are necessarily in direct contact with each other. These parts or members A and B may be either in direct contact or be supported on each other by means of one or more other parts. The same applies to other expressions such as, for example, the expression "A acts on B", which may mean "A acts directly on B" or "A acts on B by means of one or more other parts".

[0053] In the context of the present patent application, the expression "kinematically interposed between" does not necessarily mean not in "contact with". Thus, if a part A is kinematically interposed between a part B and a part C, this does not mean that A and B are necessarily in direct contact or that A and C are necessarily in direct contact. This means that a movement or a force of the part B, respectively of the part C, can be at least partly transmitted to the part C, respectively to the part B, via the part A.

[0054] In this patent application, the term mobile corresponds to a rotational movement or a translational movement or to a combination of movements, for example the combination of a rotation and a translation.

[0055] In this patent application, when two parts are indicated as distinct, this means that these parts are separate. They are: positioned at a distance from each other, and / or movable relative to each other and / or secured to each other by being fixed by added elements, this fixing being removable or not.

[0056] A single piece cannot therefore be made up of two separate pieces.

[0057] In this patent application, the term "integral" used to qualify the connection between two parts means that the two parts are linked / fixed relative to each other, according to all degrees of freedom, unless explicitly specified differently. For example, if it is indicated that two parts are integral in translation in an X direction, this means that the parts can be movable relative to each other except in the X direction. In other words, if one part is moved in the X direction, the other part performs the same movement.

[0058] In the present patent application, an elastic means may for example be a spring, such as a coil spring, elastic washers such as Belleville washers, an elastomer, a rubber.

[0059] In the following detailed description, terms such as "horizontal", "vertical", "longitudinal", "transverse", "upper", "lower", "top", "bottom", "front", "rear", "inside", "outside" may be used. These terms must be interpreted relatively in relation to the normal position of the pressure relief system / door assembly.

[0060] Two parts connected to each other will be understood to mean two parts where the movement of one necessarily causes the movement of the other.

[0061] An exemplary embodiment of the present invention will now be described in detail with reference to the figures.

[0062] The present invention makes it possible, by a single action, preferably by actuating the handle 110 of the access door 20, to balance the pressure between two premises separated by a pressure-tight wall. This could be a clean room and another premises, or nuclear premises or even pharmaceutical laboratories. The present invention advantageously relates to a system 1 intended to be integrated and / or adapted to an access door 20 allowing the passage of a user from one premises to the other. Thus, the access door 20 comprises a sealing device shaped so as to ensure a pressure seal when it is closed. This sealing device may, for example, take the form of one or more seals arranged on the access door 20 or on its frame. The system 1 may be included in a mechanism for opening an access door 20 comprising at least one bolt and / or a handle 110.The handle 110 can allow the movement of the bolt by transmitting a mechanical force via a square inside a lock.

[0063] System 1 is configured to alternate between a first configuration and a second configuration.

[0064] First configuration

[0065] In the first configuration, the cover 124 seals the conduit 131 in a sealed manner. That is to say, so that there can be no transfer of gas through the conduit 131 on either side of the access door 20 separating a first zone from a second zone. Thus, there is no pressure variation between the first zone and the second zone at the access door 20. Preferably, in the first configuration, the system 1 is configured so that the cover 124 exerts a bearing force against a mouth of the conduit 131 so that no passage of gas, such as air, can be possible through the conduit 131. Thus, in the first configuration, the system 1 is sealed against pressure variations and allows the sealing and consequently the pressure differential between the two zones on each side of the access door 20 to be maintained.In Figures 2C and 2D, examples are illustrated in which the system 1 is in the first configuration, namely not allowing the passage of a gas from one side to the other of the system 1. The gas in the first configuration cannot circulate between the two sides of the wall on which the system 1 is positioned, so that the only passage allowing the circulation of the gas is the orifice 131a of the conduit 131.

[0066] Second configuration

[0067] The second configuration corresponds to the case in which the cover 124 does not completely obstruct the conduit 131 so that there can be a pressure variation in at least one of the first zone and the second zone. In this way, the pressure variation is carried out by a circulation of the gas through the conduit 131 and preferably so that the pressure of the first zone is balanced with the pressure of the second zone or vice versa. Preferably, in the second configuration, the passage of the gas from one zone to the other is carried out only via the conduit 131. Preferably, the passage of the gas is carried out from the zone where the pressure is the highest to the zone where the pressure is the lowest. In this comma configuration, the cover 124 can either partially obstruct the conduit 131 or not obstruct the conduit 131 at all.

[0068] Equal pressure setting

[0069] Preferably, the present invention aims to achieve a state of equal pressure between the first zone and the second zone. Equal pressure may be achieved in particular when the system 1 is maintained in the second configuration for a duration less than or equal to three seconds, preferably for a duration less than or equal to two seconds, preferably for a duration less than or equal to one second.

[0070] Figures 1A, 1B show a non-limiting example in which a system 1 according to the present invention is positioned on a wall 20a of an access door 20. The system 1 is advantageously configured so as to pass entirely through the thickness of the access door 20.

[0071] In this illustrated example, the system 1 comprises a closure device 12 which comprises a transmission member 120 and a cover 124. The transmission member 120 allows the cover 124 to be moved in order to block or leave the conduit 131 partially free by actuation of the handle 110. The shutter 124 is configured to, for example, press against a periphery of the opening of the conduit 131, for example against the mouth of the conduit 131 in the first configuration so as to ensure a pressure-tight contact. Several embodiments can be envisaged to ensure this pressure-tight contact. This kinematic assembly has the advantage of being particularly reliable and robust to ensure the sealing of the system over time.

[0072] Method of implementation with a lever

[0073] According to one embodiment, the transmission member 120 comprises a first lever 121 configured to be kinematically coupled in rotation to an axis of the handle 110 so that the actuation of the handle 110 drives said first lever 121 in a rotational movement around the first axis Xi. The first lever 121 can take various forms. It can for example be formed by an arm or for example be formed by a disc. The first lever 121 is configured to preferably articulate in rotation with the cover 124 along a third axis X3. Preferably, the third axis X3 is substantially parallel to the first axis X1. The rotation of the first lever 121 thus allowing the displacement of the cover 124 along a main plane P20 substantially orthogonal to the first axis X1.

[0074] According to a particular embodiment, the first lever 121 extends between a first proximal end 121a and a first distal end 121b. The transmission member 120 may comprise a single lever configured to drive the cover 124 in translation and / or rotation so as to cause the system 1 to pass alternately between the first configuration and the second configuration.

[0075] Preferably, the first lever 121 is integral with the handle 110 at the first proximal end 121a along a first axis X1 and is integral with the cover 124 at the first distal end 121b, for example by pivot connection, along a third axis X3.

[0076] According to a preferred embodiment, the first axis X1 and the third axis X3 are substantially parallel.

[0077] Implementation with two levers

[0078] According to one embodiment, the transmission member 120 comprises a first lever 121 and a second lever 122, the two levers 121, 122 being configured so as to have an articulation between them, preferably a pivot connection along a second axis X2, substantially parallel to the first axis X1. The first lever 121 being configured to be assembled integrally in rotation with the handle 110 along the first axis X1 and the second lever 122 being configured to be integral with the cover 124, preferably by being articulated in rotation, along a third axis X3. The first lever 121 can take various forms. It can for example be formed by an arm as in the figures or for example be formed by a disc.

[0079] In other words, according to one example, the second lever 122 is simultaneously articulated in rotation with the first lever 121 and with the cover 124. The second lever 122 extends between a second proximal end 122a and a second distal end 122b. The second proximal end 122a is in pivot connection with the first distal end 121b along a second axis X2. The second distal end 122b is articulated with the cover 124 along a third axis X3 so that the action of the handle 110 drives the cover 124 in translation and / or rotation so as to cause the system 1 to pass alternately between the first configuration and the second configuration. Thus, the transmission member 120 comprises an articulated device, preferably having two pivot points.Preferably, two pivot connections configured to allow rotation of the second lever 122 relative to the first lever 121 and of the cover 124 relative to the second lever 122, the rotations being carried out respectively along the second axis X2 and the third axis X3, the two axes being preferably parallel to each other and / or to the first axis X1.

[0080] Embodiment with rocker lever

[0081] According to a particular embodiment, the closure device 12 comprises a rocking lever 123 configured so as to allow the rotational movement of the cover 124 around a first transverse axis Yi. The first transverse axis Y1 is advantageously orthogonal to the first axis X1 and / or substantially parallel to the main plane P20 along which the access door 20 extends. The first transverse axis Y1 is transverse to a main direction of extension of the conduit 131.

[0082] In other words, the transmission member 120 comprises a tilting lever 123 articulated in rotation with a fixed part of the system 1 relative to the access door 20 and along a first transverse axis Y1 parallel to one of the main faces of the access door 20 in the first configuration.

[0083] Thus, the system 1 is configured so as to allow the displacement of the cover 124 according to at least one directional component normal to the access door 20 in order to allow a “flap” type closure by pressing the cover 124 against the mouth of the conduit 131. In fact, the system 1 is configured to allow a rotational displacement of the cover 124 around the second axis Y1. According to one embodiment, the movement of the handle 110 causes the displacement of the cover 124 in a synchronized manner with the tilting lever 123 by the action of at least one lever among the first lever 121 and the second lever 122.

[0084] The first transverse axis Yi may be substantially perpendicular to the direction of the first axis Xi and / or the second axis X2.

[0085] According to one example, the tilting lever 123 may comprise at least one connecting rod 123a and preferably two connecting rods 123a, 123a. They are connected to each other by a connecting piece 123b connected to the transmission member 120. A first axis 123c of the connecting rod 123a forms a pivot connection between the tilting lever 123 and a frame of the system 1. A second axis 123d of the connecting rod 123a, advantageously merged with the second transverse axis Y2, forms a pivot connection with the connecting piece 123b. Thus, the connecting piece 123b can rotate freely relative to the connecting rods 123a, 123a. At least one support piece 123e is mounted in free rotation on the connecting piece 123b. This support piece 123e is integral with the cover 124.

[0086] Thus, when the lever 122 pulls on the cover 124, the latter is forced by the at least one connecting rod 123a to perform a movement having a component contained in a plane ZY perpendicular to the first axis X1 and a component parallel to the first axis Xi. This component parallel to the first axis X1 moves the system away from the first configuration. This component parallel to the first axis X1 moves the cover 124 away from the mouth.

[0087] When the user actuates the handle 110, the lever 122 pulls on the cover 124, which preferably causes the tensioning of an elastic device 125. An elastic device 125 will be described in more detail later. When the user stops actuating the handle 110, the spring tends to return to its rest position, which brings the cover 124 back onto the mouth, preferably by pressing the cover 124 against the mouth. The seal is then ensured automatically and reliably. The system therefore provides a seal against the pressure differential, while allowing the user to break this differential in a particularly simple manner if the door needs to be opened.

[0088] The passage hole

[0089] Preferably, the system 1 is configured to cooperate with the access door 20 via a passage orifice 20b. The passage orifice 20b may have a portion with a circular section, preferably it is an orifice with a circular section whose diameter varies between 5 millimeters and 100 millimeters. Preferably, use will be made of a passage orifice 20b whose diameter is between 20 millimeters and 60 millimeters, preferably between 30 and 50 millimeters. The passage orifice 20b may be an opening hollowed out in the access door 20, preferably passing entirely through the thickness of the access door 20.

[0090] The case

[0091] As illustrated in Figures 2A and 2B and according to one example, the system is able to be positioned in a housing 130. Preferably, the system 1 is entirely concealed inside the housing 130.

[0092] According to a preferred mode of relationship by the present invention, the system 1 comprises a housing 130 in which the transmission member 120 is housed. The housing 130 is advantageously configured to be pressed against the face 20a of the access door 20. Preferably, the housing 130 is positioned halfway up the access door 20 and / or on the side of the opening of the access door 20 in the case of opening by rotation.

[0093] According to a preferred embodiment of the present invention, the system 1 comprises a housing 130 configured so as to at least partially house the transmission member 120, preferably so as to completely envelop the transmission member 120.

[0094] According to a particular embodiment, the housing 130 is fixed to the access door 20 by plating; this may involve holding it in position using bolting elements such as screws or glue.

[0095] The housing 130 advantageously comprises a removable portion allowing access to the system 1 for maintenance purposes.

[0096] The housing 130 is advantageously secured to the access door 20.

[0097] The conduit

[0098] The system 1 comprises a conduit 131 configured to allow the passage of gas.

[0099] The conduit 131 is advantageously configured to cooperate with the passage orifice 20b. The conduit 131 is preferably cylindrical in shape. It may be a hollow tube preferably having a uniform wall thickness. The conduit 131 may have an outer casing configured to penetrate by fitting into the passage orifice 20b of the access door 20.

[0100] The conduit 131 may be a simple opening in a plate and preferably extend to a depth equal to the thickness of the plate. According to one example, the conduit 131 has a length greater than three millimeters in the direction of gas flow.

[0101] As illustrated in Figure 1C, and according to one example, the conduit 131 extends from a rear face of the housing 130. The conduit may have a cylindrical shape extending along a fourth axis X4. The conduit 131 may have a threaded portion preferably at its distal end so as to cooperate with a bolting element, such as a nut and / or a washer in order to allow the system to be fixed to the access door 20 by fitting with an orifice hollowed out in the access door 20.

[0102] The system 1 is configured so that the conduit 131 is offset relative to the first axis X1.

[0103] The cache

[0104] The cover 124 may be a portion of a plate, advantageously a portion of a metal plate. It may also be obtained by a cutting operation. The cover 124 may have circular portions. In the first configuration, the cover 124 is advantageously arranged parallel to the access door 20. In the second configuration, the cover 124 may be parallel to the access door 20.

[0105] Preferably, the cover 124 comprises an elastomer portion configured to maintain at least the seal against gas such as air in the first configuration. The elastomer portion may be bonded to the cover. The elastomer portion may at least partially penetrate inside the passage orifice 20b.

[0106] The cover 124 is preferably configured to press against the mouth of the conduit 131 so as to keep the passage of a gas through the conduit 131 sealed in the second configuration.

[0107] At least a portion of the cover 124 may penetrate inside the conduit 131 in the second configuration.

[0108] The cover 124 is advantageously coupled to an elastic device 125, preferably a spring, such as a coil spring or a helical spring allowing it to be returned from the second configuration to the first configuration. In this example illustrated in FIGS. 2C and 3C, the elastic device 125 is a tension spring. One of its ends 125a is secured to the frame of the system 1, for example the housing 130. The other of its ends 125b is secured to the connecting piece 123b. Thus, when the connecting piece 123b is moved by the transmission member 120 in a direction which tends to move the cover 124 away from the passage orifice 120b, the tension spring 125 is tensioned and generates a force to return the connecting piece 123b and therefore the cover to the right of the passage orifice 120B.In this way, the elastic device 125 is configured to produce a sufficient return force to hold the cover 124 in place by pressing it against the passage orifice 123b so as to ensure the sealing of the system in the first configuration.

[0109] The handle

[0110] Preferably, the system 1 is capable of being connected to at least one handle 110, preferably to two handles 110 and simultaneously. In fact, this allows the action of the at least one handle 110 along the first axis Xi to alternately drive the system 1 between the first configuration and the second configuration.

[0111] It may be a rotating door handle 110. Alternatively, it may be an anti-panic handle 110 with a push button, for example translative or rotating, comprising a gripping element whose thrust allows the access door 20 to be unlocked, for example by moving at least one bolt. Alternatively, it may be an anti-panic handle 110 with a rotating lever, distributed over the width of the access door 20.

[0112] Preferably, the handle 110 is configured to be rotated along a main axis Xi in order to allow the access door 20 to be unlocked.

[0113] The door

[0114] Preferably, the first axis Xi is substantially orthogonal to a main plane P20 along which a main face of the access door 20 extends.

[0115] The access door 20 may be located in a wall opening.

[0116] Preferably, the access door 20 is sealed against the passage of a gas.

[0117] Access door 20 allows the passage of a human from a first zone to a second zone.

[0118] Advantageously, the pressure of the first zone is different from the pressure of the second zone. Preferably, the pressure of the first zone is strictly greater than the pressure of the second zone. According to this same example, the cover is located on the side of the first zone relative to the passage orifice 20b.

[0119] Advantageously, the access door 20 is unlocked by moving a bolt in a strike plate. Preferably, this action is carried out by actuating the handle 110. Materials

[0120] Preferably the housing 130 is made of metal, preferably stainless steel.

[0121] According to one example, the system 1 comprises at least one element made of a material from among a metal alloy comprising for example steel, stainless steel, aluminum, copper, brass and / or titanium. Preferably, at least one element may be made of a polymer material or a composite material.

[0122] The cover 124 may include a coating forming a seal, this coating possibly being made of elastomer. It will be for example an EPDM seal, or PTFE, having a low coefficient of friction while guaranteeing a good seal. According to a particular embodiment, it will be a metal seal or a needle system. There may also be no seal and the seal would be enabled by the quality of the surface condition associated with a high AP.

[0123] Other embodiments

[0124] According to a particular embodiment, the system 1 comprises a plurality of conduits 131 and at least one cover 124 configured to close the plurality of conduits 131. Preferably, the system 1 comprises an identical number of conduits 131 and covers 124. Preferably, the system 1 comprises exactly two conduits 131 allowing the passage of gas from one zone to the other. The plurality of conduits 131 allowing a better transfer of air and consequently the use of a plurality of covers 124 of reduced size, will offer a system that is simpler to handle because it is lighter. Thus the step of equalizing the pressure of the two zones separated by the access door 20 is advantageously accelerated. Indeed, in the context of this invention, and in the presence of two zones having a high pressure differential, it would be appropriate to use a passage orifice 20b having a large section.In order to overcome this problem, the use of several passage holes makes it possible to maintain the overall rigidity of the access door 20.

[0125] According to a particular embodiment, the housing 130 is directly integrated into the thickness of the access door 20 so that it is not visible and the access door 20 has an appearance similar to a conventional door.

[0126] According to a particular embodiment, the handle 110 is integral in rotation along the first axis Xi with a square 111, the square 111 preferably being a profile with a square section. The square 111 being for example shaped to cooperate with a lock follower, so that the actuation of the handle 110 along the first axis Xi allows the unlocking of the access door 20 for example by translation of at least one bolt from or towards the inside of a strike plate. In fact, the system adapts advantageously to an opening by integration of a housing capable of being fixed on the wall of the opening. The system is integrated into the existing mechanism which initially allowed the locking control of the door.

[0127] According to a particular embodiment, the pressure difference alone allows the door to be kept closed. Thus, the device allows the creation of a pressure closing / opening system without the need for a bolt / latch device.

[0128] According to a particular embodiment, one of the two zones has a significantly larger volume than the other. Then the pressure balance will consist of the only variation in pressure of the zone having the smaller volume, up to the pressure of the first zone. The pressure of the zone having the larger volume being likely to vary negligibly.

[0129] The invention is not limited to the embodiments previously described and extends to all embodiments covered by the invention.

[0130] In particular, the embodiments below are covered by the invention.

[0131] According to a particular embodiment, in the first configuration, the cover 124 may partially penetrate inside the passage orifice 20b.

[0132] Alternatively, in the first configuration, the cover may not penetrate inside the passage orifice and still allow the system to remain gas-tight by simply obstructing the mouth of the passage orifice 20b without penetrating inside.

[0133] According to a particular embodiment, the system is configured so that the cache 124 moves linearly, preferably guided along a groove or at least one guide rail, for example in a direction parallel to the plane (YZ) preferably in a direction parallel to a lateral direction z.

[0134] Thus, the passage orifice 20b is configured to gradually move closer to the passage orifice 20b by a mechanism allowing the cover 124 to move closer to the passage orifice 20b until it is completely blocked.

[0135] According to a very particular embodiment, the system comprises an elastic member, such as a blade, or a flexible tab. The elastic member being integral with the frame of the housing 130 or with at least one part of the system fixed relative to the access door 20. The system being configured so that the passage from the first configuration to the second configuration causes the deformation of the elastic member by the cover 124. The cover 124 then exerts a force along the fourth axis X4 in order to press the elastic member against the passage orifice 20b when the cover 124 is in line with the latter, so as to keep the system 1 sealed.

[0136] According to a particular embodiment, the assembly comprising the cover 124 and the conduit 131 is configured to obstruct a passage opening 20b located at a distance from the handle 110. Preferably located on a wall or floor. The conduit 131 may also comprise a portion such as a pipe, advantageously flexible so as to offset the passage orifice 20b from the handle 110, for example at least 10 cm, or even at least 20 cm from the handle 110. The system may be adapted to numerous opening systems, in particular swing doors, sliding doors or “accordion” type doors.

[0137] DIGITAL REFERENCES

[0138] 1. pressure relief system

[0139] 110. handle

[0140] 111. square

[0141] 12. shutter device

[0142] 120. transmission organ

[0143] 121. first lever

[0144] 121a. first proximal end

[0145] 121b. first distal end

[0146] 122. second lever

[0147] 122a. second proximal end

[0148] 122b. second distal end

[0149] 123. tilt lever

[0150] 124. cache

[0151] 125. elastic device

[0152] 130. case

[0153] 131. conduit

[0154] 130c. attachment portion

[0155] 20. access door

[0156] 20a. wall

[0157] 20b. passage hole

[0158] XI. First axis

[0159] X2. second axis

[0160] X3. third axis

[0161] X4. fourth axis

[0162] Yi. first transverse axis

[0163] Y2. second transverse axis

[0164] X. Main direction

[0165] Y. transverse direction

[0166] Z. lateral direction

[0167] P20. main plan

Claims

CLAIMS

1. Pressure release system (1) of an access door (20), the access door (20) being intended for the passage of a user and being configured to maintain a pressure seal of a gas, such as air, between two zones, the system (1) comprising a handle (110) as well as a conduit (130) allowing the passage of gas from one zone to the other and having a passage orifice (20b), the system (1) being characterized in that it is configured to be kinematically coupled to a handle (110) for actuating the opening of said access door (20) and in that it comprises a closure device (12) comprising a transmission member (120) and at least one cover (124),the transmission member (120) being configured so as to allow the displacement of the cover (124) under the effect of an actuation of the handle (110) by the user, thus driving the system (1) from a first configuration in which the cover (124) completely obstructs the passage orifice, in a gas-tight manner, so as to maintain a pressure differential between the first and second zones, to a second configuration in which the cover element (124) does not completely obstruct the passage orifice so as to allow the passage of gas through the passage orifice, thus allowing pressure balancing between the two zones, the system (1) being configured so that the closure device (12) is kinematically coupled to the handle (110) so that the manipulation of the handle (110) by the user in the open position causes the system (1) to pass from the first configuration to the second configuration,the actuation of the handle (110) being carried out by rotation along a main axis (Xi), and in which the transmission member (120) comprises: a first lever (121) extending between a first proximal end (121a) and a first distal end (121b) and being configured so as to be integral with the handle (110), at its first proximal end (121a), a second lever (122) having a second proximal end (122a) and a second distal end (122b) so that at its second, proximal end (122a), the second lever (122) is in pivot connection with the first proximal end (121a) of the first lever (121) along a second axis (X2), substantially parallel to the first axis (X1) and at its second distal end (122b) the second lever (122) is secured to the cover (124) or is articulated in rotation with the cover 124 along a third axis (X3).

2. System (1) according to the preceding claim in which the first axis (X1) is directed perpendicular to a plane in which a face of the access door (20) mainly extends.

3. System (1) according to the preceding claim in which the first axis (X1) is offset relative to the passage orifice.

4. System (1) according to claim 1 in which the first axis (X1) is directed parallel to a plane (P20) in which a face of the access door (20) mainly extends.

5. System (1) according to any one of the preceding claims configured so as to allow the displacement of the cover (124) according to at least one directional component normal to the access door (20) in order to allow closing by pressing the cover (124) against the mouth of the conduit (131).

6. System (1) according to any one of the preceding claims comprising a tilting lever (123) configured to allow movement of the cover (124), this movement comprising a component in a plane normal to a first transverse axis (Y1), the first transverse axis (Y1) being substantially orthogonal to the first axis (X1) and preferably vertical.

7. System (1) according to the preceding claim comprising two connecting rods (123a, 123a) connected to each other by a connecting piece (123b), a first axis (123c) of the connecting rods (123a) forming a pivot connection between the tilting lever (123) and a frame of the system (1), a second axis (123d) of the connecting rods (123a), forming a pivot connection with the connecting piece (123b), the connecting piece (123b) being able to rotate freely relative to the connecting rods (123a, 123a), the system also comprising at least one connecting rod (123a, 123a) and a first connecting rod (123a, 123b) of the connecting rods (123a) forming a pivot connection between the tilting lever (123) and a frame of the system (1), a second axis (123d) of the connecting rods (123a) forming a pivot connection with the connecting piece (123b), the connecting piece (123b) being able to rotate freely relative to the connecting rods (123a, 123a), the system also comprising at least one connecting rod (123a, 123a) of the connecting rods ... at least one support part (123e) which is mounted in free rotation on the connecting part (123b) and which is integral with the cover (124).

8. System (1) according to the preceding claim configured so that when the second lever (122) pulls on the cover (124), the latter is forced by the connecting rods (123a) to perform a movement having a component in a first plane (ZY) perpendicular to the first axis (Xi) and a component parallel to the first axis (Xi), this component parallel to the first axis (Xi) moving the system away from the first configuration in which the cover (124) completely obstructs the passage orifice.

9. System (1) according to any one of the preceding claims comprising an elastic device (125), configured to allow the recall of the system (1) from the second configuration to the first configuration.

10. System (1) according to any one of the preceding claims comprising a housing (130) comprising a cavity capable of at least partially housing the transmission member (120) so as to make it manually inaccessible from at least one of the two zones.

11. System (1) according to the preceding claim in combination with claim 9 in which the housing (130) comprises an attachment portion (130b) fixed relative to the door (20) and the elastic device (125) is both integral with the cover (124) and with the attachment portion (130b).

12. System (1) according to any one of the two preceding claims in which the housing (130) comprises a hollow conduit (131) whose envelope is complementary to the internal wall of the passage orifice (20b) so as to allow the positioning of the system (1) relative to the access door (20) by at least partial penetration of the hollow conduit (131) inside the passage orifice (20b), a gas being able to circulate through the conduit (131).

13. System (1) according to any one of the preceding claims in which the cover (124) penetrates at least partially inside the passage orifice (20b).

14. Assembly comprising an access door (10) and the system (1) according to any one of the preceding claims.

15. Assembly according to the preceding claim in which the system (1) is integrated into the thickness of the access door (20).

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