DE731054C - Valve for pneumatic tires consisting of a molded rubber piece - Google Patents

Description

Valve for pneumatic tires Den previously made of a molded rubber piece known valves for bicycles adhere to various drawbacks, namely is among the oldest and most famous. Valves pulling on the valve rubber one extremely dirty, difficult and chore work. Very often - the newcomer will Rubber tore immediately when pulling it up. Now comes to this work the very heavy pumping with these valves. With the well-known setback 'or Cone valves allow easy pumping, but the valve is through that Construction extremely sensitive and easily damaged. These are the types of valves often so firmly clamped in the air duct that it can hardly be removed by hand more is possible, but 'very often the pliers first have to be picked up. Furthermore, in the event of damage, the entire valve must always be thrown away and replaced as an additional part is not possible for this. This makes it a valuable material thrown away. With all valves, however, there is an extremely strong squeezing effect of the rubber. necessary: necessary to achieve a sufficient seal. This requires that with all these valves only a very good rubber can be used.

To eliminate these various problems in the known valves, is the purpose of the present invention. To achieve the same, the following has been used shown and described construction created.

As the drawing shows, the valve consists of a molded rubber piece a, in which there is a passage channel. In this channel there is a round closure piece at the lower end. So that the closure piece is not squeezed out when the hose is inflated, it is secured by a safety wire c inserted transversely. At the transition from the small to the large outer diameter of the Gutnmiformstückes a support ring d is attached. When the rubber extension piece a with parts b, c and d is plugged onto the pin of the threaded part 2, the valve is ready for use.

When this now ready-to-use valve is inserted into the air duct the support ring d rests on the conical shoulder and located in the air duct prevents the rubber to be sealed from being squeezed, -as this was the case with the previous ones Valves is always the case.

Now that the union nut f is tightened, the larger one Diameter of the molded rubber piece a inevitably, because there is a support, on the inner wall surface above the cone attachment in the air duct, edrücr-t and closes so easily and absolutely perfectly airtight without any squeezing effect away.

The pumping process is as follows: After the pump is started. If the compressed air stream flows through the threaded part into the channel of the molded rubber piece a, it is broken at the cone tip of the locking piece b, slides around the conical surface and inevitably easily opens the access to the air channel of the hose, in which the rubber wall of the molded rubber piece a is lifts or removes slightly from the closure piece b, but immediately springs back again as soon as insufficient compressed air, caused by the pressure of the pump, flows in.

Claims (1)

PATENT CLAIM: Valve consisting of a molded rubber piece for pneumatic tires, characterized in that there is a support ring on the shoulder of the molded rubber piece (a) (d) and in the channel of the rubber molded piece (a-) a wire from below secured, known closure piece (b) is used.