| 摘要 |
The device incorporates a hollow body (16), including an intake aperture (20) controlled by a system for injecting a gaseous fluid under pressure, an inflation aperture (24) in communication with the tire at a pressure (P0), and an exhaust aperture (21) for venting the said fluid externally; according to the invention, it incorporates a piston (25) fitted so as to slide within at least one chamber (17) of the body (16) under the effect of the injection of the fluid via the intake aperture (20); the said piston (25) interoperates with a mobile assembly (35, 36, 39) in combination with an exhaust flap valve (27) such that:
under the effect of the injection of the gaseous fluid at a pressure (P1>P0), the piston (25) and the mobile assembly (35, 36, 39) are moved linearly against a first flexible component (38) in relation to the exhaust flap valve (27), which remains fixed, as far as a travel limitation position of the said piston (25) and the said assembly (35, 36, 39), corresponding to the opening of the injection flap valve (36) and the closure of the exhaust flap valve (27);under the effect of the injection of the gaseous fluid at a pressure (P2>P1), the piston (25) is moved against a second flexible component (40) and in relation to the mobile assembly (35, 36, 39), which remains in travel limitation position, causing the closure of an inflation component (39) and the movement of the exhaust flap valve (27) against a third flexible component (30), corresponding to its opening from the injection flap valve (36), which remains open. |
| 主权项 |
1. A pneumatic device for automatic inflation/deflation of an object comprising: a hollow body, including an intake aperture controlled by a system for injecting a gaseous fluid under pressure, an inflation aperture in communication with the object at a pressure (P0) 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; the piston interoperates with a mobile assembly in combination with an exhaust flap valve such that:
under the effect of the injection of the gaseous fluid at a pressure (P1>P0), the piston and the mobile assembly are moved linearly against a first flexible component in relation to the exhaust flap valve, which remains fixed, as far as a travel limitation position of the piston and the assembly, corresponding to the opening of the injection flap valve and the closure of the exhaust flap valve; under the effect of the injection of the gaseous fluid at a pressure (P2>P1), the piston is moved against a second flexible component and in relation to the mobile assembly, which remains in travel limitation position, causing the closure of an inflation component and the movement of the exhaust flap valve against a third flexible component, corresponding to the opening of the exhaust flap valve from the injection flap valve, which remains open. |
