MXPA99003401A - An inflation valve for sacks, bags or the like containers - Google Patents

Abstract

A flange (2) with a circular cylindrical opening (4) is provided in an inflation valve (1) for a container with non-rigid walls which is to be air-pressurised, said flange (2) being secured to the container. A filling nozzle (6) communicating with a valve body (9) is mounted with an O-ring (7) in the opening (4) of the tubular part (3). According to the invention the valve body (9) with the filling nozzle (6) is pivotally arranged in the tubular part (3) and provided with a conical inner wall (13) to which a conical valve member (16) is secured. The valve member closes a gas supply passage (14) provided with a snugly fitting opening (15) for receiving a gas supply tube (18), one end (19) thereof adapted to mechanically pushing the valve member (16) aside at insertion of the gas supply tube (18) such that the inflation valve (1) is opened.

Description

INFLATION VALVE FOR SACKS, BAGS OR SIMILAR CONTAINERS Technical Field The invention is concerned with an inflation valve of the type described in the preamble to claim 1.

BACKGROUND OF THE INVENTION An inflation valve of this type is known from applicant's European Patent No. 0,659,146. The applicant's previous inflation valve is formed of two parts, for example a lower part joined as a handle or handle form to the flange of the container and a valve carrier communicating with the lower part by means of a hinge or hinge . During use these parts are rotated around the joint and thus in its open state the inflation valve extends considerably beyond the surface of the bag. This is disadvantageous since there is often no space available between the sack and the goods where stability and retention will be ensured during transit through the container or air bag. In the applicant's previous construction, a hose for air inflation is secured to the side of the valve carrier with the front part facing away from the flange by means of a clamping coupling. The REF. 29913 hose and its attachment thus extend far from the surface of the bag and prevent manipulation of the inflation valve in the often narrow and small voids or gaps between the objects that are loaded in the storage compartment, to thereby ensure the load against movement during transit. European Patent No. 0 466 312 describes another type of valve for the same purpose. During use the container is provided with only a pre-attached flange whose tubular nozzle extending from the container is provided with a collar to which a valve element formed as a clamp can be secured after the container is arranged in the recess in which it will be used. The coupling of the valve element is carried out in any radial direction perpendicular to the axis of the valve. However, it is not possible to rotate the valve element with the inflation hose to allow inflation of all sides when the valve element is clamped on the flange. A valve is provided over the inflation nozzle secured to the container, the valve is mechanically opened by the tip of the nozzle that engages the end of the valve stem. The valve element itself is comparatively complex with several compression springs and several mechanically movable parts which ensure inter alia the automatic closing when the valve element is removed from the inflation nozzle. U.S. Patent No. 5,437,301 discloses a third inflation valve for the above object. This inflation valve limits the ability of the lower portion of the valve body to rotate relative to the valve body per se. The reason why the inflation of the container is not allowed from all possible sides when the air intake hose is rotated, but that the opening of an air exhaust passage is allowed is for the container to be deflated. The exhaust passage is also connected to a silencer. The known valve of this publication is complex and also comprises springs and movable parts which result in comparatively expensive manufacture thereof.

Brief description of the invention The object of the invention is to provide a simple valve construction and without the use of rocks or mechanical parts. In addition, it is desirable that the inflation valve be as compact as possible in the direction perpendicular to the surface of the container at the location where the inflation valve is mounted. Furthermore, it is desirable to allow inflation of all sides of the container and obtain the sealing of the valve with a subsequent insertion of a closure plug and without the use of a complex unidirectional valve. Finally, it is essential that the valve construction allows a pressure measurement in the container. This object is obtained according to the invention by means of the inflation valve summarized in the introduction which is characterized by the material mentioned in the characterizing portion of claim 1. By the use of the inflation valve according to the invention the fin of valve or - in the preferred embodiment, the conical valve element also as the sealing union, preferably in the form of an O-ring, are secured to the valve nozzle which is subsequently mounted on the flange comprising the shaped part. of plates with which the flange is secured to the container. Prior to air inflation it is then only necessary to insert one end of the gas supply tube until the front end of the tube presses the valve flap or the valve element away from the wall of the valve chamber and This opens the valve. As stated in claim 2, a circumferential collar is provided at the junction between the filling nozzle and the valve body, the collar acting as a means or retaining element in the above assembly when the valve body is secured in the portion cylindrical flange. Thus, the sealing ring in the circumferential groove of the filling nozzle is also correctly arranged in the cylindrical portion of the flange. Claim 3 describes the preferred embodiment in which the inner face of the valve body is formed as a conical surface where the cone-shaped valve element is secured. As stated in claim 4 when the cone angle of the valve member slightly exceeds the cone angle of the valve body, an almost linear sealing face is obtained along the external face of the valve member on the edge of the valve body. same in front of the filling or filling nozzle. The features summarized in claim 5 allow easy mounting of a pressure gauge or gauge on the side face of the gas supply tube. As stated above, the sealing ring between the filling or filling nozzle and the cylindrical portion of the flange preferably consists of an O-ring. Since the end of the gas supply tube that opens to the valve element is provided with thrust means that prevent the mouth of the supply gas tube from engaging the valve member, an air flow passage is obtained. free during container inflation also as during the subsequent possible deflation of the vessel.

Preferably, the gas supply tube has a retaining face that is connected to the mouth of the gas supply passage in the valve body when the gas supply tube is inserted. As a result, the maximum or optimum insertion depth of the gas supply pipe is indicated, to avoid damage to the valve element.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in greater detail hereinafter with reference to the accompanying drawings in which: Figure 1 is a schematic top view of the valve, the gas supply pipe is indicated in top view FIG. 2 is a side view of the valve F in FIG. 1 along the line 2-2 in FIG. 1; FIG. 3 is a top view of the gas supply tube and FIG. Figure 4 is a side view of the gas supply pipe.

BEST MODE FOR CARRYING OUT THE INVENTION An inflation valve 1 according to the invention is shown in Figures 1 and 2. The valve comprises a rim 2 formed of a tubular part 3 with a circular cylindrical opening 4 and a part 5 in plate shape secured with flange 2 on the side of a container (not shown). The container can be, for example, a bag, a bag or similar containers with non-rigid walls. These containers are usually formed of several layers of paper and plastic, wherein the individual layers can be laminated together or placed adjacent to each other. The layers of paper are proposed as reinforcement of the container. The plastic sheets are normally polyethylene sheets, but other types of plastic sheets can be used and arranged such as to the inside of the paper layer to ensure an air-tight container. Sacks, bags or containers are usually used to provide safety during transit in relation to storage compartments. The object of the containers is to fill the gaps between the items that are loaded in the storage compartment, to thus ensure the cargo against movement during transit. In addition, the containers can serve as impact absorbers or shock absorbers, to ensure that the cargo arrives in an undamaged condition. Such containers are used with all types of cargo transport, for example, packaging, transport or pulling the container. The containers or bags can also be used as part of the packaging of for example large fragile machines. When the load has been loaded, the uninflated containers are placed between the individual loading items. Then the containers are pressurized by means of compressed air through the inflation valve. Normally, only a slight overpressure is inflated. The size of the containers may vary, but is usually between approximately 6 x 110 cm and approximately 100 x 220 cm. The containers can usually be inflated to a thickness of about 25 to 50 cm. A filling nozzle 6 is adapted to be arranged in sealing engagement with the opening 4 of the tubular part 3. An O-ring 7 is preferably used as a sealing element and arranged in a circumferential groove 8 in the filling nozzle 6. In the embodiment shown, the filling nozzle 6 forms part of a valve body 9 and the filling nozzle 6 rotates freely in the opening 4. A circumferential collar 10 is provided at the transition between the filling nozzle 6 and the body 9 of valve. On the side facing the container, the filling nozzle 6 is provided with insertion joints or spring 11 in the form of projecting protuberances (preferably 3) which are uniformly distributed at the periphery and are ened below a circumferential flange 12 of the tubular part 3 when the filling nozzle 6 and the valve body 9 they have been inserted into the opening 4 until the collar 10 engages with the outer end face of the tubular part 3. This ensures that the valve body 9 with the filling nozzle 6 freely rotates continuously in relation to the part 3 of the flange 2. The entire valve body extends preferably slightly beyond the outer end face of the flange 2 in the axial direction of the tubular part 3. In the embodiment shown the valve body is truncated cone as length of the inner wall 13 and is provided with a gas supply passage 14 with an opening 15 substantially perpendicular to the direction of the axis of the valve body, the opening 15 extends from inside the valve body 9 to the external face thereof. A conical valve element 16 is mounted to the interior of the conical valve body 9 and secured to the valve body 9 at the junction apex 17 of the valve member 16 and the valve body 9. Thus, the valve element 16 covers the mouth of the gas supply passage 14 in the valve body 9. As shown in detail in Figures 3 and 4, a gas supply tube 18 has an end 19 which can be inserted into the gas supply passage 14, the opening 15 is formed to closely receive the end 19 of the supply 18 Of gas. The insertion end 19 of the gas supply tube 18 is provided with the pushing means 20 which keep the mouth 21 of the gas supply 18 separated so that the mouth does not engage with the valve flap or the element valve 16. As mentioned previously, similarly to the valve body 9, the valve element 16 is conical, the cone angle of the latter although it is slightly larger, for example of 2 °, in such a way that in the condition closed contact is made with the valve body is obtained at the edge 22 facing the filling nozzle. However, the valve element 16 is formed of a comparatively resilient plastic material, whereby the contact surface in practice extends somewhat upwards from this edge or flange. In the transition to the insertion end 19, the gas supply tube 18 is provided with a circumferential shoulder 23 that forms a seal at the inlet to the gas supply tube 18 such that the thrust elements 20 thereof deform the gas supply tube 20. valve element 16 just enough to open the inflation valve without damaging the valve element thereby.

When the gas supply tube 18 is thus inserted into the gas supply passage 14 the air can be inflated in a conventional manner by means of the inflation valve of a compressed air supply hose connected to the other end of the tube 18 of gas supply for example by means of a threading 24. The gas supply pipe 18 can be continuously and also when the compressed air is fed to the container to rotate freely, since the filling nozzle is movable in the tubular part 3 of the flange 2 As shown in Figures 3 and 4, the gas supply tube 18 is provided with a branch 25 for connecting a pressure gauge (not shown) the branch 25 comprises a closure plug (not shown) that can be unscrewed and replaced by a connecting plug for such manometer. The gas supply tube 18 can also rotate relative to the valve body 9 such that the branch 25 points in an appropriate direction to obtain easy access thereto. In addition, the gas supply passage 14 may be slightly conical, for example 2 ° and the end of the gas supply tube 18 which is inserted into the gas supply passage 14 may have a corresponding conical shape. As a result, the insertion of the gas supply tube 18 into the valve body 9 facilitates.

It is noted that, in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it refers.

Claims (8)

1. Claims Having described the invention as above, the content of the following claims is claimed as property: 1. An inflation valve for similar sacks, bags or containers with non-rigid walls, the containers to be pressurized, preferably with air pressure, the inflation valve comprises a flange formed of a tubular part with a circular cylindrical opening and a plate-shaped part with which the flange is secured to the container; a filling nozzle adapted to be arranged in sealing engagement in the opening of the tubular part by means of an insertion or by means of springs, characterized in that the filling nozzle can rotate freely in the opening and forms part or is attached to the body of valve which is obtained slightly beyond the outer end of the tubular part in the direction of the rim axis and perpendicular to this direction of the shaft is provided with the gas supply passage with a press-fit opening for receiving a tube of gas supply, one end thereof is adapted to mechanically open a valve flap in the insertion of the gas supply pipe, the flap is mounted to the interior of the valve body and normally maintains the gas supply passage closed due to the material elastic or the valve flap assembly. An inflation valve according to claim 1, characterized in that a circumferential collar is provided which is connected to the outer end of the tubular part at the junction between the filling nozzle and the valve body and a ring is provided of sealing in a circumferential groove in the filling nozzle to seal the coupling with the tubular part of the flange. An inflation valve according to claim 1 or 2, characterized in that the interior of the valve body is formed as a conical surface having an axis coaxial with the rim and with the apex facing away from the rim and because the flap of the valve comprises a conical valve element arranged inside the conical surface of the valve body, the conical tip being secured at the conical tip of the valve body. An inflation valve according to claim 3, characterized in that the cone angle of the valve element slightly exceeds the cone angle of the valve body, whereby the valve element in its closed state is connected to the body valve on the front edge of the filling nozzle. An inflation valve according to any of the preceding claims, characterized in that the gas supply pipe is provided with a branch for connecting a manometer. 6. An inflation valve according to claim 2, characterized in that the sealing ring is an O-ring. An inflation valve according to any of the preceding claims, characterized in that the end of the gas supply tube that opens the valve flap or the valve element is provided by means of thrust preventing the mouth of the tube from Gas supply is coupled with the valve flap or the valve element. 8. An inflation valve according to any of the preceding claims, characterized in that the gas supply tube is provided with retaining means that are connected to the mouth of the gas supply passage in the valve body at the insertion of the valve. gas supply pipe.