A tyre changing system (1) comprises a vehicle (400) having an internal combustion engine (14), a drive shaft (12) driven by the engine, and a power take off unit (10) which can be switched to take off power from the drive shaft. The power take off unit (10) drives a hydraulic pump (18) which provides hydraulic power to a hydraulic circuit, which in turn drives a hydraulically powered tyre changing apparatus (80) mounted in the vehicle. The use of a hydraulically driven tyre changing apparatus (80) avoids the need for a high voltage generator and electrical motor, so that all the components of the system can be safely operated within the vehicle. The system can further include a hydraulically driven compressor (60) and a tyre inflation apparatus (100) which utilises compressed air from the compressor. The system can further include a hydraulically driven tyre lifting apparatus (50) adapted for lifting a tyre from the ground outside the vehicle (400) to the floor (408) of a storage area within the vehicle (400).

Improvement in a tyre inflating system installed in a tyre-changing machine (1) and in communication with a pressurised fluid source and a pressurised fluid delivery member (3), comprising at least one pressure limiting valve (4) arranged upstream of said pressurised fluid delivery member (3) in said inflating system, the said pressure limiting valve (4) being arranged to limit the delivery pressure at at least two different maximum pressure threshold levels which can be alternatively selected by a user.

A safety device for inflating an envelope (32) at risk of bursting comprising:

• a tubular body (2), a piston element (3) slidably and sealably mounted within at least one inner portion of the said tubular body (2); at least one piston rod (6) integral with said piston (3) element and extending so as to protrude from one first end (5) of the said tubular body (2); an annular bottom member (11), located in the said tubular body (2) or at the said first end (5) thereof and suitable for slidably guiding the said piston rod (6) and for closing the said tubular body (2) whereby delimiting an annular space (19) together with the said tubular body and with the said piston (3); removable anchoring means (14; 39; 44) suitable for acting at the protruding end of said piston rod (6) and for constraining the said piston rod (6) to a support (18); at least one inlet opening (21) and at least one outlet opening (23) formed in the said tubular body (2) at the said annular space (19), in operation the said inlet opening (21) being suitable for being connected to a pressurised fluid source and the said outlet opening (23) being designed to be connected to the said envelope to be pressurised (32); and yielding retention (19,27) means for holding in position the said piston (3) element, so that in case of bursting, the unit formed by said tubular body (2) and said annular bottom member (11) can be moved longitudinally following a bursting impact with respect to the said piston element (3) in contrast with the said yielding retention means (19, 27).

Pressure sensitive labels, which desirably are coated with fluorescent ink (40) having a non-stick pull tab end portion are utilized to indicate a substantially maximum or minimum radial distance of a tire tread and to indicate, respectively, a substantial minimum or maximum radial distance of a matingly engagable tire rim. The tire is applied to the rim with the labels in substantial radial alignment so as to reduce the out of round portion of the tire tread.

Reifenfüllstation zum Füllen eines Rades mit Druckluft, enthaltend eine Radauflage (16) für das Rad (18), das aus einem Scheibenrad (20) und einem auf das Scheibenrad (20) aufgezogenen Reifen (24) besteht, eine erste Zentriereinrichtung (26) zum Ausrichten des Rades (18) und eine ersten Füllglocke (30), die in Achsrichtung des Rades (18) zum Abdrücken einer der beiden Reifenflanken (24a oder 24b) von dem Felgenhorn und zum Zuführen von Füllluft in das Reifeninnere reversibel verfahrbar ist. Weiterhin ist vorgesehen, dass eine zweite Füllglocke (40) zum Abdrücken der anderen Reifenflanke (24b oder 24a) zum Zuführen von Füllluft in das Reifeninnere vorgesehen ist.

Pressure sensitive labels, which desirably are coated with fluorescent ink (40) having a non-stick pull tab end portion are utilized to indicate a substantially maximum or minimum radial distance of a tire tread and to indicate, respectively, a substantial minimum or maximum radial distance of a matingly engagable tire rim. The tire is applied to the rim with the labels in substantial radial alignment so as to reduce the out of round portion of the tire tread.

Pour monter une enveloppe de pneumatique (1) sur une jante (2) équipée d'un appui central (21), il faut faire subir à l'enveloppe une déformation spéciale (déformation de la bande de roulement (10 et 11), basculement et ovalisation des bourrelets (12 et 13)), présenter la jante dans un plan perpendiculaire à celui de l'enveloppe et, par rotation relative, amener la jante et l'enveloppe dans le même plan.

Die Erfindung bezieht sich auf ein Verfahren zur Montage eines Reifens auf eine Felge. Dabei werden Fahrzeugräder mit solchen Felgen betrachtet, bei denen die Sitzflächen für die Reifenwülste am inneren Umfang der Felge neben jeweils einem sich radial nach innen erstreckenden Felgenhorn angeordnet sind und bei denen sich neben den Sitzflächen umlaufende Vertiefungen befinden, deren Grund einen im Vergleich zum Durchmesser der Sitzflächen grösseren Durchmesser aufweist. Es werden folgende Verfahrensschritte vorgeschlagen:

• a) Felge und Reifen werden bevorzugt senkrecht aufeinander zubewegt,
• b) die Felge wird in den oval aufgeweiteten Reifen hineingeführt,
• c) die Felge wird gedreht, bis die Achsen parallel verlaufen,
• d+e) eine Partie des Wulstes, dessen Sitzfläche parallel zur Felgensitzfläche verläuft, wird in die Felgenvertiefung eingeführt, danach der gesamten Wulst nachgeschoben,
• f) die Schritte d+e) werden beim anderen Wulst wiederholt,
• g) die Wülste werden durch eine Beaufschlagung des Reifens mit Luft auf die Felgensitzflächen gebracht.