CN100408130C - rubber valve - Google Patents

Abstract

The valve consists of a cartridge (1) with a core (2) inside it, and a disc-shaped technical fabric backing (3) glued to the bottom of the cartridge. The barrel and core are made of elastic rubber material. The sleeve (1) has a base (4) which is intersecting conical discs which centrally transition into a cylinder (5) covered by a hemisphere (6). Along the axis of the backing and on the barrel there are cavities (7) whose shape corresponds to that of the core. The upper part of the hemisphere (6) covering the core has a slit (8) communicating with the opening (7). The core is a solid body with a complex form starting from a cylindrical portion (9) extending to a step (10) which in turn transitions into a conical portion (11), a second cylindrical portion (12) and ends in a spherical portion ( 13). Inside the core there is an opening (14) for the coaxial line of the compressor needle. A slit (15) formed in the core leads from the coaxial opening upwards to the top of the spherical portion of the core. The axes of the slits (15) of the core (2) and of the slits (8) of the hemisphere (6) are offset from each other.

Description

rubber valve

technical field

The invention covers rubber valves designed for pneumatic tires and the sports industry, mostly valves for volleyballs, footballs, handballs, etc. as leather and rubber.

Background technique

Existing rubber valves designed for soccer balls are discs that transition into a cylinder surrounded by a fastening rubber flange bonded to the inside of the disc and to the bladder. There are coaxial openings for the compressor needles on the outside of the disc and in the part of the cylinder. After the coaxial hole the cylinder is cut up to its end so that the symmetrical parts are tightly glued together.

Another known valve comprises a base in the form of a disc, on the inside of which there is a rubber cartridge bonded, and inside the barrel and in the hole in the disc a spool made of rubber material. The core is a solid body of complex shape that begins with circular intersecting cones that transition into a foot of larger diameter, which in turn transitions into a cylindrical portion equal in diameter to the intersecting cones small diameter. The top of the barrel portion protrudes above the top of the barrel. Inside the core there is an opening of the coaxial line for the compressor needle, followed by opening the core until its top forms two symmetrical parts tightly glued together and surrounded by one or several fastening rings.

The disadvantages of these known valves are that they are unsatisfactory in terms of airtightness and that they are also very heavy, which is a disadvantageous factor for the aerodynamic properties of the ball.

Contents of the invention

The object of the present invention is to provide a rubber valve mainly designed for balls, which guarantees high and long-term reliability in terms of airtightness and weight saving.

The rubber valve "ZENKO", consisting of a cartridge in which a cavity with a core is placed, has achieved this goal. The core is an elongated ribbed body with an opening inside it for the coaxial line of the compressor needle that is connected to the inside of the ball. According to the invention, the barrel and core are made of flexible rubber material. The cylinder itself has a disk-shaped base that transitions in its middle portion into a cylinder that terminates in a hemisphere. The hemispheres have slits communicating with the cavity of the barrel. The core, covered by the hemisphere of the barrel, is a solid body of complex form, which begins with a cylindrical portion, then transitions into a foot, then into a conical portion and a second cylindrical portion, the diameter of which is equal to that of the first The diameter of the cylindrical part. The core terminates upwardly in a spherical portion. A slit is made in the core which leads from the coaxial opening up to the top of the spherical portion of the core. The axes of the two slits, the hemispherical slit of the barrel and the slit of the core, are offset from each other.

The advantages of the invention are the increased and sustained airtightness guaranteed and the reduced weight of the rubber valve, which is extremely important for the aerodynamic properties of the ball.

Description of drawings

The closest embodiment of the subject of the invention is represented in the accompanying drawings, in which Figure 1 shows a section of the cartridge and a partial section of the rubber valve core, and Figure 2 a section of the rubber valve core.

Detailed ways

The valve comprises a cartridge 1, see figure 1, with a core 2, which is placed tightly inside the cartridge, with a disc-shaped technical fabric backing 3 glued to the bottom of the cartridge. The cartridge 1 and core 2 are made of elastic rubber material.

A quick visual test shows that the sleeve 1 has a base 4 which is an intersecting conical disk extending in the middle of its interior to the interior of a cylinder 5 covered by a hemisphere 6 . Along the axis of the technical backing 3 and on the sleeve 1 there is a cavity 7 whose shape corresponds to that of the core 2 fitted into the cavity. The upper part of the hemisphere 6 covering the core 2 has a slit 8 communicating with the cavity 7 and the internal volume of the ball.

The core 2 ( FIG. 2 ) is a solid body of complex form, starting from a cylindrical portion 9 extending to a step 10 which in turn transitions into a conical portion 11 . After the conical part 11 , there is a transition into another cylindrical part 12 , the diameter of which is equal to the diameter of the first cylindrical part 9 . The cylindrical portion 12 terminates in a spherical portion 13 . Inside the core 2 there is a coaxial opening 14 for a compressor needle (not shown in the figure). The part of the core 2 starting from the coaxial opening 14 to its top, ie to its spherical part 13, comprises a slit 15 formed therein. The axes of the two slits 8 and 15 (8 of the hemisphere 6 of the sleeve 1 and 15 of the core 2 ) do not coincide but are offset from each other by a minimum distance. When inflating the ball the compressor needle is first inserted into the coaxial opening 14 and slit 15 of the core 2 and then into the slit 8 of the sleeve 1 so that compressed fluid can enter the internal volume of the ball.

When the ball is inflated, the compressor needle is withdrawn first from the slit 8 of the sleeve 1, then from the slit 15 of the core 2 and the opening 14 of the coaxial line, in reverse order. However, due to the displacement between the axes of the two subsequent protection zones and the two slits, there is no longer any risk of contact between the compressed air inside the ball and the atmosphere and a reliable three-dimensional guarantee of the airtightness of the ball is provided. level protection.

Once the ball is inflated, the slit 8 of the barrel 1 is closed. The barrel 1 in turn clamps the core 2 in its slit 15 and around its tapered portion 11, thereby providing additional protection for the airtightness of the ball.

Claims (1)

1. rubber valve, it comprises that one has the tube of a cavity, the core that one bodily form formula with ribbing that stretches is arranged in this cavity, there is an opening of coaxial line that is used for a compression eedle inside of this core, this pin is connected to the inside of a ball, this valve is characterised in that, this tube (1) and core (2) are made by the elastomeric material of flexibility, and itself (1) has the substrate (4) of a dish type tube, this substrate part therebetween is transited into a cylinder (5), this cylinder ends at a hemisphere (6), one finedraw (8) that is communicated with this cavity (7) is arranged in this hemisphere, and by the core (2) of hemisphere cover position of tube (1) is one to have the entity of following complex form, this entity is since first cylindrical portion (9), be transited into a step (10) subsequently, tapered portion (11) and second cylindrical portion (12), and upwards end at spherical portion (13), the diameter of second cylindrical portion equals the diameter of first cylindrical portion (9), the finedraw (15) that forms in core (2) upwards leads to the top of the spherical portion of core from the opening (14) of this coaxial line, at this place, article two, the axis of finedraw, promptly the axis of the finedraw (8) of the finedraw (15) of this core (2) and this hemisphere (6) is skew mutually.

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