Structure of simplified inflation valve
A simplified inflation valve includes a base forming centrally a bore. The bore has a bottom to which a PU membrane is attached. The membrane includes at least one aperture in a location outboard the bore. An outer circumference of the membrane is fixed to the base through ultrasonic technique or die pressing. A squeezer is mounted on the base and has elasticity for elastically resuming shape after being pressed and has an interior space forming an air chamber. The air chamber has a top forming at least one through hole. The squeezer has a bottom including an outer circumferential portion forming a sealing rim, which is fixed, through ultrasonic technique or die pressing, to the base so as to form an inflation valve. The inflation valve can be connected to an air bladder, whereby through pressing the inflation valve, the air bladder can be inflated.
1. A simplified inflation valve, comprising a base, a polyurethane membrane, and a squeezer, the improvements comprising:
the base being a disk-like member having a top surface on which a tubular seat is formed centrally, the tubular seat forming therein a bore extending therethrough to a bottom surface of the base;
the polyurethane membrane being arranged at a bottom of the bore and comprising at least one aperture formed in the membrane at a location corresponding to an outer circumferential portion of the bore of the base, the membrane having an outer circumference that is fixed to the bottom surface of the base through ultrasonic technique or die pressing so as to cover the bore, wherein the aperture is set at a location engageable with and closable by the bottom surface of the base in a closed position where air is blocked from passing through the aperture and wherein the polyurethane membrane is deflectable to disengage from the bottom surface of the base to open the aperture in an open position where air is allowed to pass through the aperture; and
the squeezer being mounted on the base and having elasticity for elastically resuming shape after being pressed and having an interior space forming an air chamber, the air chamber having a top forming at least one through hole, the squeezer having a bottom comprising an outer circumferential portion forming a sealing rim, which is fixed, through ultrasonic technique or die pressing, to the base so as to form an inflation valve.
2. The simplified inflation valve according to claim 1 , wherein the bottom of the bore of the base comprises a chamfer that is rounded.
3. The simplified inflation valve according to claim 1 , wherein the tubular seat on the central portion of the base has a top face that is alternately recessed and raised to form a corrugation face.
4. The simplified inflation valve according to claim 1 , wherein the base has a top having an outer circumferential portion on which a raised ring is formed.
5. The simplified inflation valve according to claim 1 , wherein the base comprises an outer circumferential portion outboard the polyurethane membrane and comprises a plurality of projecting ribs formed thereon.
6. The simplified inflation valve according to claim 1 , wherein the through hole in the top of the air chamber of the squeezer comprises a one-way valve mounted thereto.