Patent ID: 8833395
Filing Date: 2014-09-16
Classification: B60S,F04B,F16K,Y10T

Abstract:
1. An improved pressure relief valve, comprising: a main body, having a mount opening and an air outlet on two ends thereof respectively, a conduit provided between said mount opening and said air outlet; wherein an abutting portion is provided at a connecting end between said conduit and said mount opening, and a slanted section in a cone shape is provided at a connecting end between said conduit and said air outlet; a pressure adjustor comprising a sleeve; wherein said sleeve comprises a pressure relief perforation, a hollow shaft provided at an internal of said sleeve and having a through-hole penetrating a hollow portion thereof, and an anti-leakage rubber attached to a front edge of said through-hole; wherein said shaft passing through a spring is provided between a vertical wall of an inner surface of said sleeve and said anti-leakage rubber; and wherein said sleeve is fastened onto said main body, the shaft is mounted onto said mount opening of said main body and said anti-leakage rubber abuts said abutting portion of said main body such that an attachment portion of said main body is moved laterally in a left/right direction to alter a spring force exerted by said spring onto said anti-leakage rubber in order to adjust a pressure value thereof; an anti-reverse unit comprising a shaft penetrating a blocker; wherein said blocker is fastened onto said air outlet of said main body, and another end of said shaft comprises a conical member having an O-shaped ring; and wherein a spring is mounted between said conical member and an elongated member such that said anti-reverse unit is moveable; and whereby during an operation of said pressure relief valve, said shaft of said pressure adjustor is fluidly connected to an air pumping device and said air outlet is connected to an air-filling article and said pressure value of said air-filling article is set via said pressure adjustor; and whereby under a first condition, said anti-leakage rubber of said pressure adjustor blocks said abutting portion of said main body and an air filled by said air pumping device pushes said anti-reverse unit in a direction toward said air outlet, forming an adequate gap allowing said air to pass through said anti-reverse unit to fill said air-filling article; and whereby under a second condition, when said air-filling article reaches said pressure value, a feedback pressure pushes said anti-leakage rubber of said pressure adjustor, allowing said air to be released from said pressure relief perforation of said main body and causing said anti-reverse unit to maintain said air-filling article at a stabilized filling state.