Pneumatic device for controlling the automatic inflation/deflation, notably of a tire

摘要

A pneumatic device can include a hollow body including an intake aperture controlled by a system for injecting a gaseous fluid under pressure, an inflation aperture in communication with a tire at an initial pressure, and an exhaust aperture for venting the fluid externally. The pneumatic device can include a piston fitted so as to slide within at least one chamber of the body under the effect of the injection of the fluid via the intake aperture, the piston interoperates with a mobile assembly in combination with an exhaust flap valve to control inflation and deflation of the tire.

主权项

1. A pneumatic device for automatic inflation/deflation of an object, comprising: a hollow body, including an intake aperture fluidly connected to a system for injecting a gaseous fluid under pressure, an inflation aperture in fluid communication with the object at an initial pressure and an exhaust aperture for venting the gaseous fluid externally from the hollow body, wherein the pneumatic device incorporates a piston fitted so as to slide within at least one chamber of the body under the effect of the injection of the gaseous fluid under pressure via the intake aperture; and wherein the piston interoperates with a mobile assembly and an exhaust flap valve such that:
under the effect of the injection of the gaseous fluid at a second pressure which is greater than the initial pressure, the piston and the mobile assembly move to a travel limitation position linearly against a first flexible component in relation to the exhaust flap valve which remains fixed, said travel limitation position corresponding to the opening of an injection flap valve and the closure of the exhaust flap valve; under the effect of the injection of the gaseous fluid at a third pressure which is greater than the second pressure, the piston moves against a second flexible component and in relation to the mobile assembly which remains in the travel limitation position, causing the closure of an inflation component and the movement of the exhaust flap valve against a third flexible component, providing fluid communication between the exhaust flap valve and the injection flap valve.