阅读说明：本技术 一种外科创面封闭式负压引流设备 (Closed negative pressure drainage equipment of surgery surface of a wound ) 是由 江波 于 2021-06-16 设计创作，主要内容包括：本发明提供了一种外科创面封闭式负压引流设备,其结构包括持握把手、扳机、主体、负压机构、接线座,持握把手上端外壁卡合连接于主体下端外壁,扳机后端外壁活动卡合于主体内壁,负压机构下端外壁旋转固定于主体上端内壁,接线座前端活动卡合于握把手后端外壁,本发明在进行使用时,用于引导的管道可以连接至接管口,并且可将管道连接至接线座并引导于收纳袋之中,而在按动扳机后,便可启动设备令设备内部的空气排出,令设备内部出现负压的情况而抽动伤口液体进入收纳袋之中,而在对液体进行抽动时,闭合器便会开启,在停止对设备的使用后,闭合器便可进行自动复位并快速的密闭设备,避免外部的空气进入设备而推出设备内部残余的液体。(The invention provides a closed negative pressure drainage device for surgical wound surfaces, which comprises a holding handle, a trigger, a main body, a negative pressure mechanism and a wire holder, wherein the outer wall of the upper end of the holding handle is clamped and connected with the outer wall of the lower end of the main body, the outer wall of the rear end of the trigger is movably clamped and connected with the inner wall of the main body, the outer wall of the lower end of the negative pressure mechanism is rotatably fixed on the inner wall of the upper end of the main body, and the front end of the wire holder is movably clamped and connected with the outer wall of the rear end of the holding handle. The air outside is prevented from entering the device and pushing out the residual liquid inside the device.)

1. The closed negative pressure drainage equipment for the surgical wound surface structurally comprises a holding handle (1), a trigger (2), a main body (3), a negative pressure mechanism (4) and a wire holder (5), wherein the outer wall of the upper end of the holding handle (1) is connected to the outer wall of the lower end of the main body (3) in a clamping manner, the outer wall of the rear end of the trigger (2) is movably clamped on the inner wall of the main body (3), the outer wall of the lower end of the negative pressure mechanism (4) is rotatably fixed on the inner wall of the upper end of the main body (3), and the front end of the wire holder (5) is movably clamped on the outer wall of the rear end of the holding handle (1), and is characterized in that;

negative pressure mechanism (4) are taken over mouth (42), closing mechanism (43) by cylinder body (41) and are constituteed, cylinder body (41) rear end outer wall block is connected in main part (3) front end outer wall, it is fixed in cylinder body (41) front end center to take over mouth (42) rear end embedded solid, closing mechanism (43) front end outer wall activity block fits in cylinder body (41) inner wall.

2. A surgical wound closed negative pressure drainage apparatus according to claim 1, wherein: closing mechanism (43) comprise screens board (a 1), outer ring (a 2), closer (a 3), screens board (a 1) inner wall is embedded and is blocked in cylinder body (41) inner wall, outer ring (a 2) front end outer wall laminating is fixed in screens board (a 1) rear end outer wall, closer (a 3) outer wall nested joint in outer ring (a 2) inner wall.

3. A surgical wound closed negative pressure drainage apparatus according to claim 2, wherein: the closer (a 3) comprises a shell (b 1), a limiting mechanism (b 2), an upright post (b 3), an opener (b 4) and a connecting rod (b 5), wherein the inner wall of the shell (b 1) is nested and matched with the outer wall of the limiting mechanism (b 2), the inner wall of the limiting mechanism (b 2) is nested and clamped on the outer wall of the opener (b 4), the outer wall of the upright post (b 3) is nested and matched with the inner wall of the outer edge of the limiting mechanism (b 2), the outer wall of the opener (b 4) is fixedly embedded and fixed on the inner wall of the shell (b 1), and the outer wall of the connecting rod (b 5) is fixedly clamped on the inner wall of the shell (b 1).

4. A surgical wound closed negative pressure drainage apparatus according to claim 3, wherein: the opener (b 4) is composed of a positioning ring rod (c 1), a fixing column (c 2), an opening plate (c 3), a central rod (c 4) and a reset strip (c 5), wherein the outer wall of the front end of the positioning ring rod (c 1) is movably matched with the outer wall of the rear end of the limiting mechanism (b 2), the outer walls of the front end and the rear end of the fixing column (c 2) are fixedly embedded in the inner wall of the positioning ring rod (c 1), the outer wall of the opening plate (c 3) is movably matched with the inner wall of the positioning ring rod (c 1), the outer wall of the central rod (c 4) is embedded and clamped in the inner wall of the opening plate (c 3), and the inner wall of the left lower end of the reset strip (c 5) is embedded and matched with the inner wall of the opening plate (c 3).

5. A surgical wound closed negative pressure drainage apparatus according to claim 3, wherein: the limiting mechanism (b 2) comprises a limiter (d 1), a positioning ring (d 2) and a clamping pin (d 3), wherein the inner wall of the limiter (d 1) is in nested fit with the outer wall of the opener (b 4), the inner wall of the right lower end of the positioning ring (d 2) is embedded and clamped on the outer wall of the clamping pin (d 3), and the outer wall of the clamping pin (d 3) is in nested fit with the outer wall of the limiter (d 1).

6. The closed negative pressure drainage device for surgical wounds according to claim 5, characterized in that: the limiter (d 1) is composed of a double-clamp device (e 1), a nesting shell (e 2) and a pulling rod (e 3), the inner walls of the two ends of the double-clamp device (e 1) are movably clamped on the outer wall between the pulling rod (e 3), the outer wall of the pulling rod (e 3) is nested and clamped on the inner wall of the nesting shell (e 2), and the outer wall of the nesting shell (e 2) is movably matched with the outer wall of the positioning ring (d 2).

7. The closed negative pressure drainage device for surgical wounds according to claim 6, characterized in that: the re-clamping device (e 1) comprises a retention ring (f 1), a positioning rod (f 2) and a pullback device (f 3), wherein the outer wall of the retention ring (f 1) is movably matched with the inner wall of the embedded sleeve shell (e 2), the outer wall of the positioning rod (f 2) is in nested fit with the inner wall of the retention ring (f 1), and the lower end of the pullback device (f 3) is fixedly embedded in the outer wall of the upper end of the retention ring (f 1).

8. The closed negative pressure surgical wound drainage device of claim 7, wherein: pullback ware (f 3) is inhaled seat (g 3), magnetism by activity pull rod (g 1), airtight shell (g 2), magnetism and is inhaled seat (g 3), expansion seat (g 4), restriction bull stick (g 5) and constitutes, activity pull rod (g 1) upper end inner wall nested block is in restriction bull stick (g 5) outer wall, airtight shell (g 2) inner wall activity cooperation is in activity pull rod (g 1) upper right end outer wall, magnetism is inhaled seat (g 3) outer wall and is embedded to be fixed in airtight shell (g 2) lower extreme left side inner wall, expansion seat (g 4) right side outer wall laminating is fixed in activity pull rod (g 1) left side outer wall, restriction bull stick (g 5) rear end outer wall block is fixed in airtight shell (g 2) upper right end the place ahead outer wall.

Technical Field

The invention relates to the field of medical surgery, in particular to closed negative pressure drainage equipment for a surgical wound.

Background

The negative pressure closed drainage technology is a drainage technology for the wound surface of four limbs, compared with the traditional moist dressing, the wound treated by the negative pressure closed drainage technology obviously shortens the wound healing time, promotes the generation of post bud tissues, reduces the content of tissue bacteria, improves the survival rate of skin flaps or free skin grafts, and the negative pressure closed drainage technology is generally surgical wound surface closed negative pressure drainage equipment, the equipment is connected between the equipment and the wound by using a connecting pipe, the equipment is started, the negative pressure generated inside the equipment can pump and drain the liquid flowing out of the wound, the liquid overflowing from the wound is pumped to enter the equipment and is guided into an external storage bag by the equipment, but after the drainage equipment finishes the drainage and the extraction of the liquid overflowing from the wound, the drainage equipment can be stopped manually, there may also be liquid inside the tubing connected to the drainage device and after the device is stopped, external air may enter the interior of the device, thereby balancing the negative pressure inside the device, while the entry of external air may cause the air pressure inside the device to be balanced, resulting in the outflow of liquid in the tubing and the interior of the device that is not completely guided in the loading bag.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a surgical wound closed type negative pressure drainage device, which solves the problems that after the drainage device finishes drainage and extraction of liquid overflowing from a wound, the drainage device is stopped manually, liquid still exists in a pipeline connected with the drainage device, and after the device is stopped, external air enters the device, so that the negative pressure state in the device is balanced, and the air pressure in the device is balanced due to the entering of the external air, so that the pipeline and the liquid in the device are not completely guided to flow out of a loading bag.

Aiming at the above purpose, the invention is realized by the following technical scheme: a closed negative pressure drainage device for surgical wound surfaces structurally comprises a holding handle, a trigger, a main body, a negative pressure mechanism and a wire holder, wherein the outer wall of the upper end of the holding handle is clamped and connected with the outer wall of the lower end of the main body;

the negative pressure mechanism is composed of a cylinder body, a pipe connecting port and a closing mechanism, the outer wall of the rear end of the cylinder body is clamped and connected to the outer wall of the front end of the main body, the rear end of the pipe connecting port is fixedly embedded in the center of the front end of the cylinder body, and the outer wall of the front end of the closing mechanism is movably clamped and connected to the inner wall of the cylinder body.

Preferably, the closing mechanism comprises three clamping plates, an outer ring and a closer, wherein the inner wall of each clamping plate is fixedly clamped on the inner wall of the cylinder body in an embedded mode, the outer wall of the front end of the outer ring is fixedly attached to the outer wall of the rear end of the clamping plate in an attached mode, the outer wall of the closer is clamped on the inner wall of the outer ring in an embedded mode, and the three clamping plates are annularly arranged on the outer wall of the front end of the outer ring.

Preferably, the closer comprises a shell, a limiting mechanism, a stand column, an opener and a connecting rod, wherein the inner wall of the shell is nested and matched with the outer wall of the limiting mechanism, the inner wall of the limiting mechanism is nested and clamped on the outer wall of the opener, the outer wall of the stand column is nested and matched with the inner wall of the outer edge of the limiting mechanism, the outer wall of the opener is fixedly embedded on the inner wall of the shell, and the outer wall of the connecting rod is fixedly clamped on the inner wall of the shell.

Preferably, the opening and closing device comprises three positioning ring rods, a fixed column, an opening plate, a central rod and a reset strip, wherein the outer wall of the front end of each positioning ring rod is movably matched with the outer wall of the rear end of the limiting mechanism, the outer walls of the front end and the rear end of the fixed column are fixedly embedded in the inner wall of the positioning ring rod, the outer wall of the opening plate is movably matched with the inner wall of the positioning ring rod, the outer wall of the central rod is embedded and clamped in the inner wall of the opening plate, the inner wall of the left lower end of the reset strip is embedded and connected to the inner wall of the opening plate, and the structure of the opening plate is a spherical structure after combination.

Preferably, the limiting mechanism comprises a limiter, positioning rings and clamping pins, the inner wall of the limiter is in nested fit with the outer wall of the opener, the inner wall of the right lower end of the positioning ring is in embedded and clamped fit with the outer wall of the clamping pins, the outer wall of the clamping pins is in nested fit with the outer wall of the limiter, and three positioning rings are arranged on the outer wall of the limiter in an annular arrangement mode.

Preferably, the limiter comprises a re-clamping device, an embedded casing and a pulling rod, inner walls of two ends of the re-clamping device are movably clamped on the outer wall between the pulling rods, the outer wall of the pulling rod is embedded and clamped on the inner wall of the embedded casing, the outer wall of the embedded casing is movably matched with the outer wall of the positioning ring, and the re-clamping device is of a V-shaped structure.

Preferably, the double-clamp device comprises a retaining ring, a positioning rod and two pullers, wherein the outer wall of the retaining ring is movably matched with the inner wall of the embedding sleeve, the outer wall of the positioning rod is nested and matched with the inner wall of the retaining ring, the lower end of each puller is fixedly embedded in the outer wall of the upper end of the retaining ring, and the two pullers are arranged on two sides of the upper end of the retaining ring in a mirror image mode.

Preferably, the retractor comprises a movable pull rod, a closed shell, two magnetic suction seats, two expansion seats and a limiting rotating rod, wherein the inner wall of the upper end of the movable pull rod is embedded and clamped on the outer wall of the limiting rotating rod, the inner wall of the closed shell is movably matched with the outer wall of the right upper end of the movable pull rod, the outer wall of the magnetic suction seats is embedded and fixed on the inner wall of the left side of the lower end of the closed shell, the outer wall of the right side of the expansion seats is attached and fixed on the outer wall of the left side of the movable pull rod, the outer wall of the rear end of the limiting rotating rod is embedded and fixed on the outer wall in front of the right upper end of the closed shell, and the magnetic suction seats are of a water drop structure and are arranged in the movable pull rod and the closed shell respectively.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

when the device is used, the pipeline for guiding can be connected to the pipe connecting port, the pipeline can be connected to the wire holder and guided into the containing bag, after the trigger is pressed, the device can be started to discharge air in the device, so that negative pressure occurs in the device to pump wound liquid into the containing bag, when the liquid is pumped, the closer can be opened, after the device is stopped being used, the closer can automatically reset and rapidly close the device, and the phenomenon that the residual liquid in the device is pushed out by the external air entering the device is avoided.

Drawings

Fig. 1 is a structural schematic diagram of a closed type negative pressure drainage device for surgical wound surfaces.

Fig. 2 is a schematic top view of the negative pressure mechanism of the present invention.

Fig. 3 is a schematic structural view of the inventive closure mechanism.

Fig. 4 is a schematic cross-sectional view of the inventive closure.

Fig. 5 is a schematic sectional structure view of the opener of the invention.

FIG. 6 is a schematic diagram of the construction of the inventive limiting mechanism.

Fig. 7 is a schematic cross-sectional view of an inventive restrictor.

Fig. 8 is a schematic structural view of the double clamp apparatus of the present invention.

Fig. 9 is a schematic cross-sectional structure of the retractor of the invention.

In the figure: a holding handle-1, a trigger-2, a main body-3, a negative pressure mechanism-4, a wire holder-5, a cylinder body-41, a connecting pipe opening-42, a closing mechanism-43, a clamping plate-a 1, an outer ring-a 2, a closer-a 3, a shell-b 1, a limiting mechanism-b 2, a stand column-b 3, an opener-b 4, a connecting rod-b 5, a positioning ring rod-c 1, a fixed column-c 2, an opening plate-c 3, a central rod-c 4, a reset strip-c 5, a limiter-d 1, a positioning ring-d 2, a clamping pin-d 3, a re-clamping device-e 1, a nesting shell-e 2, a positioning pull rod-e 3, a positioning ring-f 1, a positioning rod-f 2, a re-f 3, a movable pull rod-g 1, a closed shell-g 2, Magnetic attraction seat-g 3, expansion seat-g 4 and limiting rotating rod-g 5.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1 to 5, the invention provides a closed negative pressure drainage device for surgical wound surfaces, which comprises a holding handle 1, a trigger 2, a main body 3, a negative pressure mechanism 4 and a wire holder 5, wherein the outer wall of the upper end of the holding handle 1 is clamped and connected with the outer wall of the lower end of the main body 3, the outer wall of the rear end of the trigger 2 is movably clamped and connected with the inner wall of the main body 3, the outer wall of the lower end of the negative pressure mechanism 4 is rotatably fixed on the inner wall of the upper end of the main body 3, and the front end of the wire holder 5 is movably clamped and connected with the outer wall of the rear end of the holding handle 1;

the negative pressure mechanism 4 is composed of a cylinder body 41, a pipe connecting port 42 and a closing mechanism 43, the outer wall of the rear end of the cylinder body 41 is clamped and connected with the outer wall of the front end of the main body 3, the rear end of the pipe connecting port 42 is fixedly embedded in the center of the front end of the cylinder body 41, and the outer wall of the front end of the closing mechanism 43 is movably clamped and connected with the inner wall of the cylinder body 41.

The closing mechanism 43 is composed of a clamping plate a1, an outer ring a2 and a closer a3, the inner wall of the clamping plate a1 is embedded and clamped on the inner wall of the cylinder body 41, the outer wall of the front end of the outer ring a2 is attached and fixed on the outer wall of the rear end of the clamping plate a1, the outer wall of the closer a3 is embedded and clamped on the inner wall of the outer ring a2, the three clamping plates a1 are arranged on the outer wall of the front end of the outer ring a2 in an annular mode, and after the assembly, the stability of the clamping plate a1 arranged at the three ends is improved after the clamping plate a1 is fixed due to the force of three points.

The closer a3 comprises a shell b1, a limiting mechanism b2, an upright post b3, an opener b4 and a connecting rod b5, wherein the inner wall of the shell b1 is nested and matched with the outer wall of the limiting mechanism b2, the inner wall of the limiting mechanism b2 is nested and clamped with the outer wall of the opener b4, the outer wall of the upright post b3 is nested and matched with the inner wall of the outer edge of the limiting mechanism b2, the outer wall of the opener b4 is fixedly embedded in the inner wall of the shell b1, and the outer wall of the connecting rod b5 is fixedly clamped with the inner wall of the shell b 1.

The opener b4 comprises a positioning ring rod c1, a fixed column c2, an opening plate c3, a central rod c4 and a reset strip c5, wherein the outer wall of the front end of the positioning ring rod c1 is movably matched with the outer wall of the rear end of a limiting mechanism b2, the outer walls of the front end and the rear end of the fixed column c2 are fixedly embedded in the inner wall of a positioning ring rod c1, the outer wall of the opening plate c3 is movably matched with the inner wall of the positioning ring rod c1, the outer wall of the central rod c4 is embedded and clamped in the inner wall of an opening plate c3, the inner wall of the left lower end of the reset strip c5 is embedded and connected to the inner wall of the opening plate c3, the opening plates c3 are three in number, the structure is a spherical structure after combination, when the spherical structure is stressed and twisted, gaps between the opening plates c3 can be opened, and excessive external air can be prevented from entering the interior of the equipment through the opened small gaps.

The following examples are set forth: when the device is required to be used, when liquid in a wound is extracted, one end of a guide tube for guiding the liquid is connected to the outer wall of the connecting tube opening 42, the other guide tube is connected to the wire holder 5 for connecting a containing bag, after the device is prepared in advance, the trigger 2 can be pressed to start the device, air in the device is discharged, a negative pressure environment in the device is realized, liquid overflowing from the wound is extracted through the guide tube through the negative pressure environment, under the action of the negative pressure, the closing mechanism 43 can be opened under the action of the negative pressure, the closer a3 arranged in the closing mechanism 43 is subjected to the action of the negative pressure, the surface of the rear end of the opener b4 is subjected to the drawing action, and after the rear end of the opener b4 is subjected to the drawing action, the rear end of the opening plate c3 arranged in the opener b4 is subjected to the drawing action of the force to open, the front opening plates c3 are folded to form a gap, so that liquid can enter the equipment through the opening plate c3 and enter the containing bag under the guidance of the equipment, the position movement of the opening plate c3 can pull the reset strip c5 to facilitate the subsequent reset, and after the opening plate c3 is folded, the angle change can occur and act on the limiting mechanism b2, so that the diameter of the limiting mechanism b2 is expanded.

Example 2

As shown in fig. 6 to 9: the limiting mechanism b2 comprises a limiter d1, a positioning ring d2 and a clamping pin d3, the inner wall of the limiter d1 is in nested fit with the outer wall of the opener b4, the inner wall of the right lower end of the positioning ring d2 is fixedly clamped on the outer wall of the clamping pin d3 in an embedded manner, the outer wall of the clamping pin d3 is in nested fit with the outer wall of the limiter d1, the three positioning rings d2 are arranged in an annular manner on the outer wall of the limiter d1, and the positioning rings d2 arranged at the three ends can fix the position of the limiter d1 after assembly, so that the situation that the position of the limiter d1 deviates when the limiter d1 is opened and closed is avoided.

The limiter d1 comprises a double-clamp device e1, a nesting shell e2 and a pulling rod e3, the inner walls of the two ends of the double-clamp device e1 are movably clamped on the outer wall between the pulling rods e3, the outer wall of the pulling rod e3 is nested and clamped on the inner wall of a nesting housing e2, the outer wall of the nesting housing e2 is movably matched with the outer wall of the positioning ring d2, the double-clamp device e1 is of a V-shaped structure, and the V-shaped structure can connect the pulling rods e3 at the two ends.

The re-clamping device e1 comprises a retention ring f1, a positioning rod f2 and pullback devices f3, the outer wall of the retention ring f1 is movably matched with the inner wall of the embedded sleeve e2, the outer wall of the positioning rod f2 is nested and matched with the inner wall of the retention ring f1, the lower end of the pullback devices f3 is fixedly embedded in the outer wall of the upper end of the retention ring f1, the pullback devices f3 are arranged in two, the two pullback devices f3 are arranged on two sides of the upper end of the retention ring f1 in a mirror image mode, the pullback devices f3 arranged at two ends can work together and pull the pullback rods e3 at two ends, and therefore the closing speed is improved.

The retractor f3 is composed of a movable pull rod g1, a closed shell g2, a magnetic suction seat g3, an expansion seat g4 and a limiting rotating rod g5, the inner wall of the upper end of the movable pull rod g1 is nested and clamped on the outer wall of the limiting rotating rod g5, the inner wall of the closed shell g2 is movably matched with the outer wall of the right upper end of the movable pull rod g1, the outer wall of the magnetic suction seat g3 is fixedly embedded in the inner wall of the left side of the lower end of the closed shell g2, the outer wall of the right side of the expansion seat g4 is fixedly attached to the outer wall of the left side of the movable pull rod g1, the outer wall of the rear end of the limiting rotating rod g5 is fixedly clamped on the outer wall in front of the right upper end of the closed shell g2, the magnetic suction seats g3 are of a water drop-shaped structure, the two magnetic suction seats are arranged, and are respectively arranged between the movable pull rod g1 and the closed shell g2, and the magnetic suction seats g3 arranged at two ends act in a magnetic suction mode, so that the magnetic suction seat g3 can pull the movable pull rod g1 to reset.

The following examples are set forth: when the device works, the negative pressure environment inside the device can cause the inside of the device to extract external air or substances, the force applied during extraction can act on part of parts inside the device, so that the part of parts have position deviation, after the position deviation occurs, the limiter d1 can expand under the action of the position movement of the part of parts, when the limiter d1 expands, the position movement of the double clamp e1 can drive the pulling rod e3, so that the two ends of the pulling rod e3 pull the two ends of the double clamp e1, so that the pullback f3 arranged in the double clamp e1 is influenced by pulling force to expand, the lower end of the pullback f3 is connected to the fixed ring f1, the position of the pullback f2 is fixed, the situation that the pullback f3 is pulled to carry out position deviation is avoided, after the pullback f3 is pulled, the movable pull rod g1 arranged in the pullback f3 can limit the central deviation angle of the rotating rod 5 to carry out position deviation, and when the lower extreme at activity pull rod g1 moved, the position of activity pull rod g1 removed just can act on expansion seat g4, through the removal of expansion seat g4 and pulling magnetism seat g3, make the magnetism of both ends inhale seat g3 apart from lengthening, realize opening of equipment, and after equipment stopped using, the magnetism of both ends inhale seat g3 and can adsorb through the magnetic force that applys each other and reset, make equipment close, avoid outside air admission equipment inside, extrude the inside remaining liquid of equipment, lead to the liquid to spill over.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.