Patent ID: 8393878
Filing Date: 2013-03-12
Classification: F04B

Abstract:
1. A structure for preventing water leakage in a diaphragm type pressurized pump used in reverse osmosis purification comprising: a) a motor having an output shaft, b) a hood chassis at one end of the motor, c) a plurality of wobble plates pivotably disposed in the hood chassis and driven by the motor shaft in axial reciprocating motion, each wobble plate including a threaded hole, d) a diaphragm sheet covering the hood chassis and including a circumferential ring seal and a plurality of ribs extending radially outwardly from a center thereof to the ring seal to define a plurality of piston regions corresponding to the wobble plates, each piston region including an integral hollow cylinder, e) a piston head chunk having a ladder hole disposed over the hollow cylinder of each piston region, f) a screw extending through each ladder hole and hollow cylinder, the screw being threadedly engaged within the threaded hole of a corresponding wobble plate to deform the cylinder into sealing engagement with the piston chunk and wobble plate to prevent water leakage from between the fixing screw and threaded hole, g) a piston valve body disposed on a top surface of the diaphragm sheet, the valve body including a plurality of water drain ports, a plurality of water inlet ports, and an anti-reverse baffle, and h) a pump cover body including a water inlet orifice, a water outlet orifice and a ladder groove, the cover body being secured to the upper hood chassis by a plurality of bolts through a plurality of corresponding bolt holes on both the cover body and the upper hood chassis.