Modular system port of a closed circuit rebreather (CCR)

Abstract

The object of the invention is a modular system port of a closed-circuit breathing apparatus, located in a plastic body (1) of a diving apparatus module, which body (1) is provided with at least one port opening (2) connected to at least one air channel (3) inside the body (1) and a port insert (6,7,8,9) having a diving hose connection (14), a flange (13) and a fastening connector of the port insert (10), installed with a fastening connector of the port insert (10) sealed with at least one O-ring (12) inside the port opening (2) characterized in that, that in the body (1) perpendicular to the axis (2a) of the opening of the port (2) is made a locking hole (4) passing through the opening of the port (2), the axis of the locking hole (4a) being either outside the contour of the opening of the port (2) or tangent to the cylindrical edge of the opening of the port (2) Furthermore inside the locking hole (4) a locking means (5) is detachably attached, whereby the fastening connector of the port insert (10) of the port insert (6,7,8,9) on the cylindrical outer surface is provided with a stop (15), matched in shape and size to the lateral surface of the locking means (5), forming a retaining edge for the locking means (5).

Description

MODULAR SYSTEM PORTOF A CLOSED CIRCUIT REBREATHER (CCR)

[0001] The object of the invention is a modular system port for a closed circuit rebreather (CCR) breathing apparatus, intended particularly for use in its main modules, such as the head, gas distribution block and manual addition valve (MAV), constituting the basic elements of the equipment of a diver using a rebreather. The head connected to the scrubber canister of the carbon dioxide absorber and the manual addition valve, along with the rest of the set, form an apparatus called a rebreather (closed-circuit breathing apparatus).

[0002] CCR apparatuses can work in many different configurations, depending on the type of dive being carried out, it can be a conventional backmount configuration with a single cylinder or two-cylinder set as well as a sidemount configuration with cylinders mounted on the sides of the diver's body. A rebreather allows both recreational diving and specialized technical diving.

[0003] CCR apparatuses consist of a series of components which require connection with low / medium pressure LP hoses for gas transfer and cables for transmission of digital and analog electrical signals. Depending on the connection point and configuration, different types of male and female threaded connections are used, 3 / 8 inch, 7 / 16 inch, 9 / 16 inch, 1 / 4 inch, etc. The choice of a specific type of connector often depends not only on the design of the apparatus itself, but also on the personal preferences of the user, the type and configuration of other equipment components, as well as the specific requirements imposed by the performed diving. For this reason, it is necessary to use various types of adapters, which, due to the need for sealing, constitute potential points of failure. Due to the fact that the components of modem CCR rebreathers (e.g. the head body and the MAV valve body) are made of plastic, it is also necessary to protect the threads from damage, which requires the use of various types of solutions such as metal inserts attached with screws / bolts or screwed into the threads of a larger size, so-called reduction nipples, as well as inserts permanently placed in the body of the equipment by pressing them in or installed during injection molding.

[0004] From U.S. patent description US8272381B2 "Closed circuit rebreather" is known rebreather, in which the head of the device and the oxygen control valve are provided, among other things, with connectors for oxygen, diluent gas and dive computers. The bodies of the devices are provided with permanently attached connector ports. Any change in configuration forces the use of different types of adapters or reducing nipples because it is impossible to replace the ports.

[0005] A different solution to the one described in the above patent was used in the Fathom Mk III CCR system, among others. In this device, the head and MAV valve also contain oxygen and diluent connectors, while the ports are screwed into threaded openings made in the bodies of the equipment. The situation is similar for the MAV Omniswivel MIV-2 valve. A common feature of the above solutions is that the bodies of the devices are made of plastic. Threaded openings in the body allow screwing in ports of different sizes e.g.: 3 / 8 inch or 7 / 16 inch, nipples or threaded metal sleeves. The sleeves or nipples are provided with a hexagonal collar, as in the case of a bolt head, which allows holding while screwing the hose which reduces the risk of damaging the threads during screwing.

[0006] With this type of connection, during normal operation, the high loads from the hoses cause the thread to wear out anyway. Unskillful replacement of ports or screwing in hoses without the use of a locking key can break the threads in the seat as it is made of plastic. This type of solution does not give the possibility of using a swivel connection, that is, e.g., it is impossible to implement an angle connector (elbow) on it.

[0007] The KISS Sidewinder CCR system (which constitutes the closest state of the art) is equipped with two scrubbers. Each head is connected to a canister of the absorbent bed. In the head of the first scrubber are the bayonet, oxygen and diluent supply hose connections, as well as the automatic diluent valve (ADV). The set is equipped with a constant interstage pressure oxygen regulator and a manual oxygen addition device (MAV). Metal inserts with threaded openings of adequate size are embedded in the bodies of the devices. Diver hoses, i.e. pressure hoses for the transmission of gases and cables for the transmission of electrical signals, are connected to the inserts, either directly or through reduction nipples. The design has many advantages, however, it is not free of disadvantages, which include the fact that the inserts have rather large dimensions, which negatively affects the possibility of miniaturization of components and arrangement of ports. In the case of threaded connections (bolts, reducing nipples), high loads can still cause threads to strip.

[0008] Another problem is the difficulty of implementing swivel connections (elbows) and thus the need for positioning the output ports to allow for optimal organization and arrangement of hoses. The large quantity of equipment makes it difficult to position the hoses optimally, increases the risk of entanglement and forces the hose to bend at a very small radius, leading to damage to the hose core and resultant loss of gas. When such a situation happens during a dive, it is extremely dangerous and can lead to injury or death from drowning. Properly positioned hoses do not restrict the diver's freedom of movement are arranged in a collision-free manner and do not impede access to system components. The hoses, in optimum arrangement, exit the head and the MAV valve exactly in the direction in which they are then guided and are not kinked byother elements of the diver's equipment such as diluent bottle(s) and, in particular, the buoyancy compensator.

[0009] The elbow and swivel connections known, among others, from US patent descriptions US5213095A “Coupling apparatus for scuba gear”, US7188869B2 “Scuba regulator connector using a sealed ball swivel” or US7712793B1 “Scuba regulator connector using swivel ball and one-piece bushing” partially solve the problem of adequate arrangement of pressure hoses, unfortunately, since these types of solutions have rather large dimensions they negatively affect the possibility of miniaturization of components and still force adequate arrangement of ports. Additionally, such solutions increase the risk of failure due to redundant O-ring seals.

[0010] In summary, the existing solutions have disadvantages, which include, among others, that in the case of threaded connections (bolts, sleeves, reducing nipples), made in plastic housing / bodies, the high loads from hoses occurring during normal operation may cause the threads to wear out or strip. It is impossible or difficult to replace port inserts, which can lead to thread stripping e.g. when screwing or unscrewing hoses without using a locking key. It is difficult to implement swivel connections (elbows), and thus it is problematic to appropriately route hoses so that they are not kinked by the rest of the diver's equipment. The large dimensions of existing solutions negatively affect the ability to miniaturize components and force the need for appropriate arrangement of ports in the bodies of devices.

[0011] The modular system port of a closed circuit rebreather (CCR) according to the invention solves the above problems and inconveniences.

[0012] The purpose of the invention is to unify the ports by designing a modular system port, allowing installation of various types of port inserts in the port opening, appropriately sealed and locked against falling out and, in the case of elbow inserts, allowing their swivel. This solution eliminates all of the aforementioned disadvantages of previous solutions, while providing the user with the ability to configure ports as needed, e.g. replacing LP ports from 3 / 8" female to 9 / 16" male with basic tools and allows the installation of both swiveling port inserts (e.g. 90° or 45° elbow) and port inserts locked in a specific position in the same socket.

[0013] The above tasks have been achieved by making a modular system port for a closed circuit rebreather (CCR), which, according to the invention, is enclosed in the plastic body of the breathing apparatus module. The body is provided with at least one port opening connected to at least one air channel inside the body and a port insert. The port insert has a diving hose connector, collar and mounting connector. The port insert is installed with a fastening connector sealed with an O-ring inside the port opening. Modular system port of a closed circuit rebreather (CCR) is characterized by the fact that in the body perpendicular to the axis of the port opening is made a blindlock opening passing through the port opening. The axis of the lock opening is either outside the outline of the port opening or tangent to the cylindrical edge of the port opening. In addition, a locking means is detachably mounted inside the lock opening, and the port insert fastening connector is provided with a stop. The stop is matched in shape and size to the side surface of the locking means. The stop forms the retaining edges for the locking means.

[0014] With the above modular system port solution, it is possible to unify the ports, allowing installation of various types of port inserts in the same universal port opening, appropriately sealed and locked against falling out with locking means. Removal of the locking means makes it possible to slide the insert out of the port and replace it. The solution provides the user with the ability to configure the ports as needed, e.g. replacing the port insert from a 3 / 8" version to a 9 / 16" version port insert. Additionally, high loads from hoses, occurring during normal operation, do not cause damage to the plastic threads of the body port opening, since the port openings according to the invention are threadless.

[0015] Preferably, the lock opening is blind and threaded and threaded in the lower part and the locking means is in the form of a locking bolt with a headless pin, a screwing tool socket and a thread on the bottom part of the pin.

[0016] The solution provides the ability to replace port inserts with basic tools.

[0017] Preferably, in the elbow port insert, the connector of the diving hose is inclined to the axis of the port insert, which is also the axis of the fastening connector at an angle, which can be an acute angle, a right angle or an obtuse angle.

[0018] Preferably, the locking screw stop is in the form of a locking screw guide, the groove constituting the locking screw guide is made around the entire circumference of the cylindrical outer side surface of the fastening connector, around the axis of the port insert, and forms the retaining edges for the locking screw, with the locking screw guide matching the shape and size of the cylindrical side surface of the locking screw.

[0019] The above solutions eliminate the problem of inappropriate routing of hoses, making it possible to implement elbow ports and swivel connections. Elbow swivel inserts make it easy to route hoses so that they are not kinked by other pieces of diver's equipment.

[0020] It is preferable that the profile of the stop constitutes a section of a circle with a radius not smaller than the radius of the locking screw.

[0021] It is preferable that the profile of the guide constitutes a section of a circle with a radius not smaller than the radius of the locking screw.

[0022] The above solutions make it possible to install both swivel port inserts (e.g. a 45° or 90° elbow) and port inserts locked in a specific position in the same socket.

[0023] Preferably, the distance between the lock opening and the face of the port opening is equal to either the distance between the port insert collar and the port insert stop or the distance between the port insert collar and the port insert guide.

[0024] With this solution, it is possible to precisely seat the port insert inside the port opening exactly at the depth at which the locking screw is inserted.

[0025] Preferably, the fastening connector of the port insert is provided with at least two grooves for retaining rings of which at least one is adjacent to the collar of the port insert.

[0026] The above solution allows optimum sealing of the port insert depending on its function, intended use or installation location in the body of the closed circuit rebreather module.

[0027] It is preferable that if the port opening is located on the wall of a body with a nonflat surface, the port opening is made in the technological cavity. The technological cavity is in the form of an opening with a flat bottom and a diameter not smaller than the collar of the port insert. The technological cavity allows for a flat contact surface between the port insert and the body.

[0028] The above solution makes it possible to locate the modular system port in any part of the body even at the edge interface or on an irregularly shaped surface, e.g., on the cylindrical side surface of the scrubber head body of a closed circuit rebreather (CCR).

[0029] It is preferable that the port insert is provided with a connector of the diving hose with internal thread or the port insert is provided with a connector of the diving hose with external thread.

[0030] The above solution ensures that the user can configure the ports as needed, e.g. replacing the port insert from a 3 / 8" female version, to a 9 / 16" male version port insert, with the help of basic tools.

[0031] The object of the invention is presented in an embodiment in the drawing of the modules of a closed circuit rebreather (CCR), in which:• [Fig-1] presents an exploded view in an isometric view of the components of the MAV manual addition valve of a closed circuit rebreather (CCR) with three modular system ports,• [Fig.2] presents detail A of [Fig.l], isometric view of the locking screw,• fig. 3 presents an isometric view of the port insert locked in a given position in the female version (with internal thread) 3 / 8 inch,• fig. 4 presents a side view of the port insert locked in a specific position in the female version (with internal thread) 3 / 8 inch,• fig. 5 presents an isometric view of the port insert locked in a specific position in the male version (with external thread) 9 / 16 inch,fig. 6 presents a side view of the port insert locked in a specific position in the male version (with external thread) 9 / 8 inch,[Fig.7] presents an isometric view of the 45° swivel elbow port insert in the male version (with external thread) 9 / 16 inch, fig. 8 presents a side view of the 45° swivel elbow port insert in the male version (with external thread) 9 / 16 inch, fig. 9 presents an isometric view of the 90° swivel elbow port insert in the male version (with external thread) 9 / 16 inch, fig. 10 presents a side view of the 90° swivel elbow port insert in the male version (with external thread) 9 / 16 inch,[Fig.11] presents an isometric view of the body of the MAV manual addition valve without attached port inserts, fig. 12 presents an isometric view of the body of the MAV manual addition valve with 3 / 8-inch female port inserts attached, fig. 13 presents a top view of the body of the MAV manual addition valve without attached port inserts, fig. 14 presents cross-section A-A of fig. 13,[Fig.15] presents a side view of the MAV manual addition valve without attached port inserts with the invisible lock openings marked, fig. 16 presents a cross-section B-B of [Fig.15],[Fig.17] presents a view of the MAV manual addition valve from the side of the installed 3 / 8-inch female port insert, fig. 18 presents a cross-section C-C of [Fig.17],[Fig.19] presents an exploded view of the isometric projection of the 02 sensor head body of a closed circuit rebreather (CCR) with two modular system ports,[Fig.20] presents a side view, from the side of the modular system ports, of the ADV head of the closed circuit rebreather with port inserts locked in position in the female version (with internal thread) 3 / 8 inch, fig. 21 presents a side view, from the side of the modular system ports, of the ADV head of the closed circuit rebreather with port inserts locked in position in the male version (with external thread) 9 / 16 inch, fig. 22 presents a side view, from the modular system ports, of the ADV head of a closed circuit rebreather with 45° swivel elbow port inserts in a male version (with external thread) 9 / 16 inch, fig. 23 presents a side view, from the modular system ports, of the ADV head of a closed circuit rebreather with 90° swivel elbow port inserts in a male version (with external thread) 9 / 16 inch,• [Fig.24] presents a side view of the 3 / 8 inch insert side of the ADV head of a closed circuit rebreather, with one port insert locked in position in the female version (with internal thread) 3 / 8 inch and the other port insert locked in position in the male version (with external thread) 9 / 16 inch,• fig. 25 presents a cross-section D-D of [Fig.24],• [Fig.26] presents a side view of the 9 / 16 inch insert side of the ADV head of a closed circuit rebreather, with one port insert locked in position in the female version (with internal thread) 3 / 8 inch and the other port insert locked in position in the male version (with external thread) 9 / 16 inch,• fig. 27 presents a cross-section E-E of [Fig.26].

[0032] The embodiment presents a modular system port of a CCR system type breathing apparatus equipped with two scrubbers (canisters with heads) and a two-button MAV manual addition valve (diluent + oxygen). The head of the first scrubber, located on the exhale side, plays the role of the ADV head. The head of the second scrubber, located on the inhale side, plays the role of the 02 sensors head. The bodies (1) of the heads and the MAV valve are made of plastic.

[0033] The solution of the modular system port presented in the embodiment is to unify the ports by using a universal port opening (2) in the body (1) of the breathing apparatus module, in which a port insert (6, 7, 8, 9) is installed, sealed against falling out or swiveling (depending on the version of the port), using a locking means (5).

[0034] In the body (1) of the breathing apparatus module, a port opening (2) is made, connected to the air channels (3) inside the body (1). Perpendicular to the axis (2a) of the port opening (2), a lock opening (4) is made through the port opening (2), with the axis of the lock opening (4a) being outside the outline of the port opening (2) or tangent to the cylindrical edge of the port opening (2). The lock opening (4) is blind and threaded in the lower part (the thread is not shown in the drawing figures).

[0035] A locking means (5) is placed inside the lock opening (4). In the embodiment, a locking screw (5) is screwed into the lock opening. The locking screw (5) is in the form of a headless pin, with an Allen key socket (5a) and a thread on the lower part of the pin (5b). In the embodiment, the locking screws (5) are made of stainless steel.

[0036] Four exemplary port inserts are presented in the embodiment. One port insert with 3 / 8-inch internal thread in the female version (6) and three port inserts with 9 / 16-inch external thread in the male version (7,8,9). Two inserts locked in a certain position (protected from falling out and swiveling) i.e. a 3 / 8 inch insert in the female version (6) and a 9 / 16 inch insert in the male version (7), and two swivel inserts locked against falling out i.e. a 9 / 16 inch elbow insert 45° in the male version (8) and a 9 / 16 inch elbow insert 90° in the male version (9). In the embodiment, the port inserts (6, 7, 8, 9) are made of stainless steel.

[0037] One end of the port insert (6, 7, 8, 9) is provided with a connector for fastening (10) with the body (1) of the breathing apparatus module and the other end constitutes the connector (14) of the diving hose. By diving hoses, the inventor means both pressure hoses supplying gas and cables supplying digital and analog signals.

[0038] Around the perimeter of the port insert part (6, 7, 8, 9), which is the fastening connector (10), two grooves (11) are made for sealing rings (12) (o-rings). Each of the port inserts (6, 7, 8, 9) is provided with a collar (13) to facilitate precise determination of the depth at which the fastening connector (10) is to be placed inside the port opening (2).

[0039] In the case of an insert (6) with an internal thread, the other end of the insert, constituting the connector of the diving hose (14), is terminated by a collar (13) and inside the through-hole a 3 / 8 inch thread is made.

[0040] In the case of inserts (7,8,9) with male threads, the other end of the insert, constituting the connector of the diving hose (14), is terminated with a sleeve with a 9 / 16 inch male thread connected to the through-hole.

[0041] In the case of elbow inserts (8,9), the connector (14) of the diving hose is inclined to the axis (8a, 9a) of the port insert (8, 9), at the same time as the axis of the fastening connector (10) at an angle (a) of either 45° or 90°. The inventor also provides for elbow port inserts (8, 9) with a different angle of deflection (a), both acute and obtuse.

[0042] The diameter of the port opening (2) and the diameter of the fastening connector (10) is selected in such a way that prior to the attachment of the locking screw (5) it is possible to both insert / retract and swivel the port insert (6, 7, 8, 9) inside the port opening (2), and at the same time the connection is tight enough for the sealing o-rings (12) to perform their function.

[0043] The fastening connector (10) for port inserts (6, 7) locked in position is provided with a stop (15) of the locking screw (5). The notch constituting the stop (15) of the locking screw (5) is made on a portion of the cylindrical outer side surface of the fastening connector (10), perpendicular to the axis (6a, 7a) of the port insert (6, 7) and forms the stop edges for the locking screw (5). The stop (15) of the locking screw is matched in shape to the cylindrical side surface of the locking screw and its profile constitutes a section of a circle with a radius (R) not smaller than the radius (r) of the locking screw (5).

[0044] Attached to the body (1) of the breathing apparatus module, the locking screw (5) in this case prevents both the port insert (6,7) from falling out of the opening (2) and prevents it from swiveling around the axis (2a) of the opening (2). The attached locking screw (5) working with the stop (15) constitutes a kind of cotter pin that prevents the port insert (6, 7) from changing position.

[0045] Fastening connector (10) for elbow port inserts (8,9), swivel ones, is provided with a stop (15) in the form of a guide (16) of the locking screw (5). The groove constituting the guides (16) of the locking screw (5) is made around the entire circumference of the cylindrical outer side surface of the fastening connector (10), around the axis (8a, 9a) of the port insert (8, 9) and forms the retaining edges for the locking screw (5). The guide (16) of the locking screw (5) matches the shape of the cylindrical side surface of the locking screw and its profile constitutes a section of a circle with a radius (R) not smaller than the radius (r) of the locking screw (5) - identical to that of the stop (15), except that it is made around the entire circumference of the fastening connector (10).

[0046] In this case, the locking screw (5) attached in the body (1) of the breathing apparatus module prevents the port insert (8,9) from falling out of the opening (2) but allows the insert (8,9) to swivel around the axis (2a) of the opening (2). The attached locking bolt (5) together with the guide (16) constitute a kind of rail-guide system for the swiveling movement of the port insert (8,9).

[0047] The inventor also provides for elbow port inserts (8, 9) with an anti-swivel attachment, locked in a specific position, with the stop (15) of the locking screw (5) made on a portion of the outer side surface of the fastening connector (10).

[0048] In the embodiment, two grooves (11) for sealing rings (12) (o-rings) are located at the end of the fastening connector (10) of the port insert (6, 7, 8, 9). The inventor also envisages the possibility of using the seal elsewhere, i.e. placing at least one groove (1) under the sealing ring (12) between the collar (13) and the stop (15) of the locking screw (5) or between the collar (13) and the guide (16) of the locking bolt (5).

[0049] The body (1) of the MAV manual addition valve is provided with three modular system ports. In the body of the MAV there are other technological openings (20), in which the constant mass flow orifice (17), the oxygen addition button (18) and the diluent addition button (19) are fitted. The constant mass flow orifice (17) and addition buttons (18,19) are made according to solutions known in the state of the art, and their design and principle of operation are obvious to a person skilled in the art. For greater clarity of the solution description, they were presented only on the arrangement drawing ([Fig.l]) and on isometric view (fig. 12).

[0050] The body (1) of the 02 sensor head (shown on the arrangement drawing, [Fig.19]) is provided with two modular system ports connected to air channels (3) inside the body (1). The body (1) of the ADV head (shown in other drawings and sections, [Fig.20]- 27) is also provided with two modular system ports connected to air channels (3) inside the body (1). The body (1) has a cylindrical shape, in which one of the bases is provided with an attachment (la) for fitting the head into the canister of the absorbent bed. The external appearance and shape of the body (1) in both cases is identical. The arrangement of port openings (2), air channels (3), mounting sockets and othertechnological openings (20) and chambers inside the body (1) can be different, which depends on the role played by the head.

[0051] Since the modular system ports in the heads are arranged on the cylindrical part of the body (1), they are made in technological cavities (21) allowing for a flat contact surface between the port insert (6, 7, 8, 9) and the body (1). The technological cavity (21) is in the form of an opening with a flat bottom and a diameter not smaller than the collar (13) of the port insert (6, 7, 8, 9).

[0052] Installation of the port insert (6, 7, 8, 9) in the body (1) involves fitting it inside the port opening (2) and then locking its position by tightening the locking screw (5) with an Allen key. Since the distance (d) between the lock opening (4) and the face (2b) of the port opening (2) is equal to the distance (d) between the collar (13) and the stop (15) or the collar (13) and the guide (16), it is possible to precisely fit the port insert (1) inside the port opening (2) exactly at the depth where the locking screw (5) is screwed in.

[0053] Replacement of the insert (6, 7, 8, 9) involves unscrewing the locking screw (5) with an Allen key, changing the insert (6, 7, 8, 9) to any other and then tightening the locking screw (5).

[0054] In summary, the modular system port of the closed circuit rebreather described in the embodiment allows the installation of various types of port inserts (6, 7, 8, 9) in a single port opening (2) and locking them against falling out of the port opening (2) by means of a locking screw (5) working with a stop (15) or guide (16). In the case of elbow inserts (8,9), the guide (16) allows the port insert (8,9) to swivel around the axis (2a) of the port opening (2). Two ring seals (12) of the fastening connector (10) of the port insert (6, 7, 8, 9) protect the interior of the body (1) from leakage. The small dimensions of the presented solution have a positive effect on the possibility of miniaturization of components.

[0055] The solution according to the invention ensures that the user can configure the ports as needed, e.g. replacing the LP port insert from a 3 / 8” female version (6), to a 9 / 16” male insert (7), using only an Allen key.

[0056] The modular system port presented in the embodiment makes it possible to install, in the same universal port opening (2), both swivel port inserts (8,9) (e.g. 45° or 90° elbow) and port inserts (6,7) locked in a specific position. The solution allows the implementation of swivel connections (elbows), and thus facilitates the appropriate routing of hoses, so that they are not kinked by the rest of the diver's equipment. Additionally, high loads from hoses, occurring during normal operation, do not cause the previously described effects of damage to the body ports (1) of the closed circuit rebreather module.List of designations:

[0057] 1 Body of closed circuit rebreather module

[0058] la Mounting of the body

[0059] 2 Port opening

[0060] 2a Axis of the port opening

[0061] 2b Face of the port opening

[0062] 3 Air channels inside the body

[0063] 4 Lock opening

[0064] 4a Axis of the lock opening

[0065] 5 Locking screw

[0066] 5a Locking screw Allen key socket

[0067] 5b Locking screw thread

[0068] 6 Port insert locked in a specific position with 3 / 8 inch internal thread (female version)

[0069] 6a Axis of the port insert locked in a specific position with 3 / 8 inch internal thread (female version)

[0070] 7 Port insert locked in a specific position with 9 / 16 inch external thread (male version)

[0071] 7a Axis of the insert of the port locked in a specific position with 9 / 16 inch external thread (male version)

[0072] 8 Elbow port insert with 45° swivel, locked against falling out with 9 / 16 inch external thread (male version)

[0073] 8a Axis of elbow insert with 45° swivel, locked against falling out with 9 / 16 inch external thread (male version)

[0074] 9 Elbow port insert with 90° swivel, locked against falling out with 9 / 16 inch external thread (male version)

[0075] 9a Axis of elbow insert with 90° swivel, locked against falling out with 9 / 16 inch external thread (male version)

[0076] 10 Fastening connector of the port insert

[0077] 11 Grooves for sealing rings

[0078] 12 Sealing rings (o-rings)

[0079] 13 Collar of the port insert

[0080] 14 Connector of the diving hose

[0081] 15 Locking screw stop

[0082] 16 Locking screw guide

[0083] 17 Constant mass flow orifice

[0084] 18 Oxygen addition button

[0085] 19 Diluent addition button

[0086] 20 Other technological openings of the body

[0087] 21 Technological cavity of the port opening

[0088] d Distance between the lock opening and the face of the port opening equal to either the distance between the port insert collar and the port insert stop or between the port insert collar and the port insert guide

[0089] a Angle of deviation of the diving hose connector from the axis of the port insert and the axis of the fastening connector

[0090] r Locking screw radius

[0091] R Radius of the profile of the stop and profile of the guide of the locking screw

Claims

Claims

1. A modular system port of a closed circuit rebreather, located in a plastic body (1) of a breathing apparatus module, the body (1) being provided with at least one port opening (2) connected to at least one air channel (3) inside the body (1) and a port insert (6, 7,8,9) having a connector of the diving hose (14), a collar (13) and a fastening connector (10), installed with a fastening connector (10) sealed with at least one O-ring (12) inside the port opening (2). characterized in that a lock opening (4) is made in the body (1) perpendicular to the axis (2a) of the port opening (2), passing through the port opening (2), with the axis of the lock opening (4a) either outside the outline of the port opening (2) or tangent to the cylindrical edge of the port opening (2), additionally, inside the lock opening (4), a locking means (5) is detachably mounted, whereby the fastening connector (10) of the port insert (6, 7, 8, 9) on the cylindrical outer surface is provided with a stop (15), matching in shape and size to the side surface of the locking means (5), forming a retaining edge for the locking means (5).

2. A modular system port of a closed circuit rebreather according to claim 1 characterized in that the lock opening (4a) is blind and threaded in the lower part and the locking means (5) is formed as a locking screw (5) with a headless pin, a screwing tool socket (5a) and a thread on the lower part of the pin (5b).

3. A modular system port of a closed circuit rebreather according to claim 2 characterized in that in the elbow port insert (8,9), the connector (14) of the diving hose is inclined to the axis (8a, 9a) of the port insert (8, 9), which is also the axis of the fastening connector (10) at an angle (a), which can be an acute angle, a right angle or an obtuse angle.

4. A modular system port of a closed circuit rebreather according to claim 3 characterized in that the locking screw (5) stop (15) is in the form of a locking screw (5) guide (16), the groove constituting the locking screw (5) guide (16) is made around the entire circumference of the cylindrical outer side surface of the fastening connector (10), around the axis (8a, 9a) of the port insert (8, 9) and forms the retaining edges for the locking screw (5), withthe locking screw (5) guide (16) matching the shape and size of the cylindrical side surface of the locking screw.

5. A modular system port of a closed circuit rebreather according to claim 2 or 3 characterized in that the profile of the stop (15) constitutes a section of a circle with a radius (R) not smaller than the radius (r) of the locking screw (5).

6. A modular system port of a closed circuit rebreather according to claim 4 characterized in that the profile of the guide (16) constitutes a section of a circle with a radius (R) not smaller than the radius (r) of the locking screw (5).

7. A modular system port of a closed circuit rebreather according to any of the claims 1 to 6 characterized in that the distance (d) between the axis (4a) of the lock opening (4) and the face (2b) of the port opening (2) is equal to the distance (d) between the collar (13) of the port insert (6,7) and the center of the stop (15) profile of the port insert (6,7) or the distance (d) between the collar (13) of the port insert (8,9) and the center of the guide profile (16) of the port insert (8,9).

8. A modular system port of a closed circuit rebreather according to any of the claims 1 to 7 characterized in that the fastening connector (10) of the port insert (6, 7, 8, 9) is provided with at least two grooves (11) for sealing rings (12) of which at least one is adjacent to the collar (13) of the port insert (6, 7, 8, 9).

9. A modular system port of a closed circuit rebreather according to any of the claims 1 to 8, characterized in that in the case of positioning the port opening (2) on the wall of the body (1) with a non-flat surface, the port opening (2) is made in a technological cavity (20), in the form of an opening with a flat bottom and a diameter not smaller than the collar (13) of the port insert(6.7.8.9), the technological cavity (20) making it possible to obtain a flat contact surface of the port insert (6, 7, 8, 9) with the body (1).

10. A modular system port of a closed circuit rebreather according to any of the claims 1 to 9 characterized in that the port insert(6.7.8.9) is provided with a connector of the diving hose (14) with an internal thread or the port insert (6, 7, 8, 9) is provided with a connector of the diving hose (14) with an external thread.

Images