BG64273B1 - Rubber valve - Google Patents

Abstract

The rubber valve shall find application in the sports industry, in particular as a valve for leather and rubber volleyball, basketball, football, handball and other types of balls. It has an improved design. The valve consists of a cartridge (1) with a core (2) and a technological pad (3) pasted to the bottom of cartridge (1). Cartridge (1) and core (2) are made of elastic rubber material. On its outside the cartridge (1) has a base (4) in the form of a truncated conical disc, continuing as a cylinder (5) in the middle of its internal part, and ending as a hemisphere (6). Along the axis of the technological pad (3) and cartridge (1) a cavity (7) is fabricated, the shape of which matches the shape of core (2). The upper part of the hemisphere (6), which covers core (2), has a split part (8), connected to hole (7). Core (2) has the form of a body of a complicated form. It begins with a cylindrical part (9), gradually turning into a step (10), a conical part (11), and second cylindrical part (12) and ending by a spherical part (13). Inside the core (2), a coaxial hole (14) is made for the compressor needle. In the core (2) part, from the coaxial hole (14) to its top, i.e. to its spherical part (13), inclusive, a fine split (15) is fabricated. The centre lines of split (15) of core (2) and of the split part (8) of the hemisphere (6) are shifted from each other.

Description

Technical field

The invention relates to a rubber valve, which will find application in the pneumatic and sports products of the industry, in particular as a valve for leather and rubber volleyball, basketball, football, handball and other balls.

BACKGROUND OF THE INVENTION

A rubber valve intended for soccer balls is known, representing a disc extending into a cylindrical body which is enclosed by a clamping rubber flange glued to the inside of the disc and to the ball plunger. A coaxial inlet port for the compressor needle is formed in the outer part of the disc and in the part of the cylindrical body. After the coaxial hole, the cylindrical body is cut to its end so that two symmetrical, tightly fitting parts are formed (1).

Also known is a valve consisting of a disk-shaped base to which a rubber sleeve is glued to the inside of which a valve core made of rubber material is housed inside and in an opening made into the disk. The core is a body of complex shape, beginning with the inverted truncated conical portion, which extends into a step with a larger diameter and then into a cylindrical portion with a diameter equal to the small diameter of the truncated cone. The tip of the cylindrical portion extends above the tip of the sleeve. Inside the core is formed a coaxial hole for the compressor needle, after which the core is cut to its tip into two symmetrical, tightly fitting to each other, covered by one or more clamping rings (2).

Characteristic of the known ball valves is their poor sealing reliability, as well as their high weight, which is an unfavorable factor for the aerodynamics of the balls.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a rubber ball valve that guarantees high and long-lasting leak-proof reliability at reduced weight.

The problem is solved with a rubber valve, which consists of a sleeve in which a cavity is formed and a core is placed therein. The core is an elongated ribbed body, within which is made a coaxial hole for the compressor needle, connected to the internal volume of the ball. According to the invention, the sleeve and core are made of elastic rubber material. The sleeve has a disk-shaped base extending in the middle of its inner part into a cylinder ending in a hemisphere. In the hemisphere is formed a slit portion connected to the cavity of the sleeve. The core, which is covered by the hemisphere of the sleeve, is a body of complex shape, beginning with a cylindrical part, passing successively into a step, then into a conical part and a second cylindrical part with a diameter equal to the diameter of the first cylindrical part. The core ends with a spherical part. A fine gap is formed in the part of the core from the coaxial opening to the tip of its spherical part, including. The axes of the two slits - that of the hemisphere of the sleeve and that of the core, are offset relative to each other.

The advantages of the invention are the guaranteed and increased, continuous tightness of the balls, as well as the reduced weight of the rubber valves, which improves the aerodynamics of the balls.

An explanation of the attached figures

An exemplary embodiment of the invention is shown in the accompanying drawings, of which: Figure 1 is a sectional view of the sleeve and a partial sectional view of the rubber valve core;

Figure 2 is a sectional view of the core of the rubber valve.

An exemplary embodiment of the invention

The valve consists of a sleeve 1 (Fig. 1), inside which the core 2 is tightly placed, and a disk-shaped technological textile pad 3 glued to the bottom of the sleeve 1. The sleeve 1 and the core 2 are made of elastic rubber material.

The outside of the sleeve 1 has a base 4 representing a truncated conical disc extending in the middle of its inner part into a cylinder 5 ending with a hemisphere 6. A cavity 7 is formed along the axis of the technological support 3 and of the sleeve 1 whose shape corresponds to the shape of the core 2 contained therein. The upper part of the hemisphere 6, which covers the core 2, has a cracked portion 8 connected to its cavity and the inner volume of the ball.

The core 2 (Fig. 2) is a body of complex shape, beginning with a cylindrical part 9, passing in step 10, and it - in a conical part 11. After the cone-shaped part 11 there is a second cylindrical part 12 with a diameter equal to the diameter of the first cylindrical part part 9, and ends with a spherical part 13. Inside the core 2, a coaxial hole 14 is formed for the compressor needle (not shown in the attached figures). In the part of the core 2 from the coaxial hole 14 to its tip, i.e. up to its spherical part 13, inclusive, is a fine gap 15. The center lines 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 and are offset from each other by a minimum distance.

When the ball is pumped, the compressor needle is inserted sequentially into the coaxial hole 14 and the slot 15 of the core 2 and then into the slit portion 8 of the sleeve 1 so that the compressed fluid passes into the inner volume of the ball.

After pumping the ball, the compressor needle is removed in the opposite sequence, first from the slit portion 8 of the sleeve 1 and then from the slit 15 and the coaxial hole 14 of the core 2. In this way, through the two protective belts in succession, and due to the displacement of the axes of the two. the gap eliminates the connection of compressed air in the ball to the atmosphere and creates a secure three-stage protection against airtightness.

Once the ball is inflated, the slot 8 of the sleeve 1 closes. The sleeve 1 further tightens the core 2 both in its slit portion 15 and around its conical portion 11, thus further preventing the ball from being sealed.

Claims (1)

Claims 1. A rubber valve comprising a sleeve with a cavity formed therein, in which is placed a core representing an elongated ribbed body, within which is made a coaxial opening for the compressor needle, associated with the internal volume of the ball, characterized in that the sleeve (1) and the core (2) are made of elastic rubber material, the sleeve itself (Dec base (4) shaped like a disc extending in the middle of its inner part into a cylinder (5) ending with a hemisphere (6) with a slit (8) connected to the cavity (7) of the sleeve, and a core (2) which o is covered by the hemisphere of the sleeve (1), is a body of complex shape, beginning with a cylindrical part (9) extending successively into a step (10) into a conical part (11), a second cylindrical part (12) having a diameter equal to of the diameter of the first cylindrical part (9), and ending with a spherical part (13), with a fine gap (()) formed in the part of the core (2) from the coaxial hole (14) to the tip of its spherical part (13). 15), with the axial lines of the slit (15) of the core (2) and the slit portion (8) of the hemisphere (6) offset relative to the other Hugo.