Patent ID: 6393625
Filing Date: 2002-05-28
Classification: E03C

Abstract:
A plumbing device for a basin drainage, the plumbing device comprising:a pump having a handle to pump air out of the pump; a cap having an inlet formed to mate with a free end of the pump to receive the pumped air from the pump, a valve receiving channel formed to receive therein a pressure release valve which comprises a pushbutton, a spring, a positioning sleeve, a probe and a seal that is connected to the probe, a passage defined to communicate the inlet and the valve receiving channel and extending to a bottom face of the cap, wherein the seal is securely received in the passage to selectively seal the communication between the valve receiving channel and the inlet, and a cover formed on the bottom face of the cap; a pressure chamber securely screwed to the cap and having a sealing provided on a top peripheral edge of the pressure chamber so that when the pressure chamber is connected to the cap, an air-tight seal is accomplished between the cap and the pressure chamber, a cylindrical moving chamber movably received in the pressure chamber and provided with an open end corresponding to the cover and a bore defined in a side face of the moving chamber for achieving a pressure balance between the moving chamber and the pressure chamber, a pressure release path formed in the pressure chamber to communicate with the air and to selectively communicate with the passage and having a rubber pad provided on top of the pressure release path to selectively engage with a bottom face of the moving chamber; and a suction cup having a head receiving recess defined to detachably receive therein a head formed on a bottom face of the pressure chamber and having an air path communicating with the pressure release path.