Patent ID: 6279599
Filing Date: 2001-08-28
Classification: F04B,Y10T

Abstract:
An air hose assembly for a portable tire pump and having the dual functions of inflation and pressure release, in which an air nozzle screw sleeve is threadedly coupled to an external screw sleeve of an air nozzle of a tire so that inflation and pressure release can be achieved in the same air hose structure, said air hose assembly comprising an abutting rubber ring, a hollow core, an air nozzle screw sleeve, a connecting screw, a washer, a tension spring, an insert valve tube, a valve tube rubber ring, a rear screw sleeve, a tightening ring and an air hose, whereinthe abutting rubber ring is fitted on an end portion of a front end of the hollow core, the hollow core having a lip portion and external threads at a rear end so that when the hollow core passes through a rear end hole of the air nozzle screw sleeve, the hollow core can be prevented from slippage by the abutting action of the lip portion, the external threads being threaded engaged with an internal threaded hole of the connecting screw to thereby achieve a through structure; the connecting screw being threadedly received in the hollow core by means of the internal threaded hole and further having an external threaded portion for threaded engagement with the rear screw sleeve, the washer being fitted on the external threaded portion of the connecting screw, the insert valve tube and the tension spring being disposed in the rear screw sleeve in sequence and being positioned by means of the connecting screw to thereby achieve an integral structure, the rear screw sleeve being provided with internal threads for threaded engagement with the connecting screw and having an end hole at a rear end thereof for passage of the insert valve tube and discharge of tire pressure; the insert valve tube and the tension spring disposed inside the rear screw sleeve forming a spring-based valve structure, in which the insert valve tube is a hollow tubular body having a valve disk at a front end and an insert portion at a rear end, the valve tube rubber ring being fitted inside the valve disk, the insert portion being inserted into the air hose and being secured in position by the tightening ring.