CS199782B1 - Device for detection of tyres valve leakage - Google Patents

Description

(54) Leak detection device for automobile tire valves

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting leaks in automobile tire valves by means of which leakage of air from inflated tires caused by defective tires is easily and reliably detected.

To date, there is no device for this purpose and leakage detection is carried out with saliva applied to the end of the valve housing, which in the event of a leak creates a small bubble, which is a sign of leakage. This detection method is considerably primitive, unhygienic and many times unreliable, especially when the test is to be carried out directly on the mounted wheel, for example in heavy rain or frost.

These drawbacks are overcome by the device for detecting the tightness of valves of automobile tires according to the invention, which consists of a nozzle to which an airtightly bonded foil of a bag-like shape is attached.

The advantage of detecting valve leaks by the device according to the invention is that there is no need to apply saliva to the valve housing which has not often wanted to be attached to the housing, tore or created an air gap, as well as ensuring complete hygiene and reliability.

The accompanying drawing shows a cross-section of a nozzle slid onto a valve housing and provided with an inflatable film transferred to the bag manner. Nozzle 2 most preferably of resilient

199 782

199 782 of the rubber material, for example, provided with an inflatable foil 1 in the shape of a balloon. The foil 1 is fastened to the nozzle 2 in an airtight manner. The nozzle g from the insertion side onto the valve housing 1 is provided with a tapered bore for easier insertion; the nozzle material ensures good sealing of the nozzle against the valve housing

Upon insertion of the nozzle g in case of valve leakage, the air escapes as indicated by the arrows indicated from the valve housing 8 through the nozzle g into the tube-shaped foil 1 which it inflates, as indicated by the dotted lines.

It should be noted that the film X does not have to be of a resilient material, and that in the present case it is not a transition to the dashed drawing position by non-elasticizing the walls of the film, as is the case with a balloon inflation. Vice versa. The normal shape of the film 1 is as shown by the dotted shape in the drawing. Before the measurement, it is before the nozzle g is pushed onto the valve housing 8 that the foil is compressed so that it is shaped according to the solid drawn line. This forced the air out of the foil and ensured a minimum volume. After the nozzle g has been fitted with the film thus prepared i, a minimum amount of air leakage is required to return the film X to the flood, i.e., the dotted position.

In order for the inflation of the film 1 to be clearly visible, it will be expedient to make the film in a well visible color, which is a further advantage compared to the colorless bubble.

Claims (1)

OBJECT OF THE WINE IE OF Π A device for detecting the leakage of automobile tire valves, characterized in that it is formed by a hub (2) which is terminated in an airtight foil (1) in a bag-like shape.