Vibration-reducing structure for four-compression-chamber diaphragm pump

Abstract

A vibration-reducing structure for compressing diaphragm pump features a pump head body and a diaphragm membrane. The pump head body includes four operating holes, a first curved vibration-reducing positioning structure circumferentially disposed around the upper side of each operating hole, and or a linked four-curve positioning structure that collectively extends around all of the operating holes. The diaphragm membrane includes four equivalent piston acting zones and second curved vibration-reducing position structures situated at positions corresponding to the positions of the first curved vibration-reducing positioning structures. The first positioning structures in the pump head body, which may be grooves, slots, perforations, or protrusions, mate with the corresponding second positioning structures in the diaphragm membrane to reduce the moment arm generated during pumping by movement of the diaphragm membrane, which may be protrusions, grooves, slots, or perforations, thereby generating less torque to decrease the strength of vibrations and vibration noise.

What is claimed is: 
     
         1 . A four-compression-chamber diaphragm pump with a vibration-reducing structure, wherein said four-compression-chamber diaphragm pump includes a motor, a pump head body fixed to a motor housing, a roundel mount situated on a lower side of the pump head body and four eccentric roundels that extend through four operating holes in the pump head body, a diaphragm membrane fixed to the eccentric roundels through the operating holes and situated on an upper side of the pump head body, and four pumping pistons arranged to be moved in a pumping action upon movement of the diaphragm membrane, wherein:
 the pump head body includes at least one first curved vibration-reducing positioning structure at each operating hole on the upper side of the pump head body,   the diaphragm membrane includes at least one second curved positioning structure at a respective position on the diaphragm membrane that corresponds to a position of said at least one first vibration-reducing positioning structure on the pump head body, and   the at least one first positioning structure mates with the corresponding at least one second positioning structure to reduce a moment arm generated during pumping by movement of the diaphragm membrane, thereby generating less torque during said movement to decrease a strength of vibrations and vibration noise.   
     
     
         2 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said motor includes an output shaft, and said compressing diaphragm pump further includes a wobble plate with an integral protruding cam-lobed shaft and a piston valvular assembly, and wherein:
 said output shaft of said motor extends through a shaft coupling hole in said wobble plate to cause said wobble plate to rotate;   said integral protruding cam-lobed shaft of said wobble plate extends through a central bearing of said eccentric roundel mount;   said four eccentric roundels are evenly disposed around a circumference of the eccentric roundel mount, whereby rotation of said wobble plate causes sequential up-and-down movement of each of said eccentric roundels, each eccentric roundel having a top face, a positioning groove formed in the top face, and a fastening bore formed in the top face;   said pump head body is secured to an upper chassis of the said motor to encompass the wobble plate and eccentric roundel mount therein, said four operating holes in said pump head body being disposed at locations corresponding to locations of said four eccentric roundels, each operating hole having an inner diameter slightly bigger than an outer diameter of a corresponding one of said eccentric roundels for respectively receiving the corresponding one of the eccentric roundels;   said diaphragm membrane is made of a semi-rigid elastic material and placed on the pump head body, said diaphragm membrane including four annular raised rims extending from a bottom side of the diaphragm membrane to mate with the respective positioning grooves in the top face of the respective four eccentric roundels, as well as four evenly spaced radial raised partition ribs extending from a top side of the diaphragm membrane to form four equivalent piston acting zones, wherein each piston acting zone has an acting zone hole formed therein at a position corresponding to a position of a fastening bore in a respective one of the eccentric roundels;   each pumping piston has a tiered hole and a fastening member extends through the tiered hole of each pumping piston, through the acting zone hole of each corresponding piston acting zone in the diaphragm membrane, and into the respective fastening hole in a respective one of the eccentric roundels to secure the diaphragm membrane and each of the four pumping pistons to the corresponding four eccentric roundels in the eccentric roundel mount;   said piston valvular assembly, which covers the diaphragm membrane and is peripherally secured to the diaphragm membrane by sealing engagement, includes a central outlet mount having a central positioning bore and four equivalent sectors, each of which contains multiple evenly circumferentially-located outlet ports, a T-shaped plastic anti-backflow valve with a central positioning shank, and four circumferential inlet mounts, each of the four circumferential inlet mounts including multiple evenly circumferentially-located inlet ports and an inverted central piston disk mounted to the respective inlet mount so that each piston disk serves as a valve for each corresponding group of multiple inlet ports, wherein the central positioning shank of the plastic anti-backflow valve mates with the central positioning bore of the central outlet mount such that said multiple outlet ports in the central round outlet mount communicate with the four circumferential inlet mounts, and a hermetic preliminary water-pressurizing chamber is formed in each inlet mount and corresponding piston acting zone in the diaphragm membrane upon the diaphragm membrane being peripherally secured to the piston valvular assembly such that one end of each of the preliminary water-pressuring chamber is communicable with each corresponding one of said inlet ports;   said pump head cover, which covers on the pump head body to encompass the piston valvular assembly, pumping piston and diaphragm membrane therein, includes a water inlet orifice, and a water outlet orifice, said pump head cover being hermetically attached to the assembly of diaphragm membrane and piston valvular assembly, wherein a high-pressured water chamber is configured between a cavity formed by an inside wall of an annular rib ring and the central outlet mount of the piston valvular assembly;   said at least one first positioning structure includes at least one of a basic curved groove, curved slot, curved set of openings, curved protrusion, and curved set of protrusions, each said first positioning structure being circumferentially-disposed around an upper side of each of the four operating holes in the pump head body or linked to extend collectively around an upper side of all of the operating holes; and   said at least one second vibration-reducing positioning structure includes one of a basic curved protrusion, curved set of protrusions, curved groove, curved slot, and curved set of openings, each said at least one second positioning structure being circumferentially-disposed around each of the four annular raised rims at the bottom side of the diaphragm membrane at a position corresponding to a position of each first positioning structure in the pump head body so that each second positioning structure at the bottom side of the diaphragm membrane is mated with each corresponding first positioning structure at the upper side of the pump head body upon assembly of the pump head body and the diaphragm membrane, whereby the moment arm generated by movement of the diaphragm membrane in response to up-and-down movement of the pistons extends between the first vibration-reducing structures and a periphery of the second vibration-reducing structures to thereby reduce vibrations resulting from said movement of the diaphragm.   
     
     
         3 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved groove or slot in the pump head body and each said second vibration-reducing positioning structure is a curved protrusion extending from the diaphragm membrane. 
     
     
         4 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 3 , wherein each said first vibration-reducing positioning structure includes a second curved groove or slot circumferentially disposed around the first groove or slot in the pump head body and each said second vibration-reducing positioning structure includes a second curved protrusion circumferentially disposed around the first curved protrusion extending from the diaphragm membrane. 
     
     
         5 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure is a curved groove or slot extending from the diaphragm membrane. 
     
     
         6 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 5 , wherein each said first vibration-reducing positioning structure includes a second curved protrusion circumferentially disposed around the first curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure includes a second curved groove or slot circumferentially disposed around the first curved groove or slot in the diaphragm membrane. 
     
     
         7 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said first vibration-reducing positioning structures are combined to form a linked four-curve groove or slot in the pump head body and said second vibration-reducing positioning structures are combined to form a linked four-curve protrusion extending from the diaphragm membrane. 
     
     
         8 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said first vibration-reducing positioning structures are combined to form a linked four-curve protrusion extending from the pump head body and said second vibration-reducing positioning structures are combined to form a linked four-curve groove or slot in the diaphragm membrane. 
     
     
         9 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure includes an annular groove or perforated ring in the pump head body and each said second vibration-reducing positioning structure includes a curved protrusion or set of protrusions extending from the diaphragm membrane. 
     
     
         10 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 9 , wherein said first vibration-reducing positioning structure further includes a linked four-curve protrusion extending from the pump head body and around all four of said operating holes and corresponding annular grooves or perforated rings, and wherein said second vibration-reducing positioning structure further includes a linked four-curve groove or slot in the diaphragm membrane that extends around all four of said raised rims and curved protrusions or sets of protrusions extending from the diaphragm membrane. 
     
     
         11 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure includes a curved protrusion or set of protrusions extending from the pump head body and each said second vibration-reducing positioning structure includes an annular groove or perforated ring in the diaphragm membrane. 
     
     
         12 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 11 , wherein said first vibration-reducing positioning structure further includes a linked four-curve protrusion extending from the pump head body and around all four of said raised rims and corresponding curved protrusions or sets of protrusions, and wherein said second vibration-reducing positioning structure further includes a linked four-curve groove or slot in the diaphragm membrane that extends around all four of said operating holes and annular grooves or perforated rings in the diaphragm membrane. 
     
     
         13 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a set of curved grooves or slots in the pump head body and each said second vibration-reducing positioning structure is a set of curved protrusions extending from the diaphragm membrane. 
     
     
         14 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a set of curved protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a set of curved grooves or slots in the diaphragm membrane. 
     
     
         15 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a set of round indents or holes in the pump head body and each said second vibration-reducing positioning structure is a set of round protrusions extending from the diaphragm membrane. 
     
     
         16 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a set of round protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a set of round indents or holes in the diaphragm membrane. 
     
     
         17 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a set of square indents or holes in the pump head body and each said second vibration-reducing positioning structure is a set of square protrusions extending from the diaphragm membrane. 
     
     
         18 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a set of square protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a set of square indents or holes in the diaphragm membrane. 
     
     
         19 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said diaphragm membrane includes an inner raised rim and a parallel outer raised rim extending from a top of said diaphragm membrane, said piston valvular assembly includes a downwardly extending raised rim, and said to downwardly extending raised rim of said piston valvular assembly extends between said inner and outer raised rims of said diaphragm membrane to provide a peripheral seal when said diaphragm membrane is peripherally secured to said piston valvular assembly. 
     
     
         20 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said fastening bores in said eccentric roundels are threaded bores and said fastening members are screws. 
     
     
         21 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said cavity is formed by a bottom of an annular rib ring of the pump head cover being pressed onto a rim of the central outlet mount of the piston valvular assembly. 
     
     
         22 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved groove or slot in the pump head body and each said second vibration-reducing positioning structure is a curved protrusion extending from the diaphragm membrane. 
     
     
         23 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 22 , wherein each said first vibration-reducing positioning structure includes a second curved groove or slot circumferentially disposed around the first groove or slot in the pump head body and each said second vibration-reducing positioning structure includes a second curved protrusion circumferentially disposed around the first curved protrusion extending from the diaphragm membrane. 
     
     
         24 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure is a curved groove or slot extending from the diaphragm membrane. 
     
     
         25 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 24 , wherein each said first vibration-reducing positioning structure includes a second curved protrusion circumferentially disposed around the first curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure includes a second curved groove or slot circumferentially disposed around the first curved groove or slot in the diaphragm membrane. 
     
     
         26 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said first vibration-reducing positioning structures are combined to form a linked four-curve groove or slot in the pump head body and said second vibration-reducing positioning structures are combined to form a linked four-curve protrusion extending from the diaphragm membrane. 
     
     
         27 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said first vibration-reducing positioning structures are combined to form a linked four-curve protrusion extending from the pump head body and said second vibration-reducing positioning structures are combined to form a linked four-curve groove or slot in the diaphragm membrane. 
     
     
         28 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure includes an annular groove or perforated ring in the pump head body and each said second vibration-reducing positioning structure includes a curved protrusion or set of protrusions extending from the diaphragm membrane. 
     
     
         29 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 28 , wherein said first vibration-reducing positioning structure further includes a linked four-curve protrusion extending from the pump head body and around all four of said operating holes and corresponding annular grooves or perforated rings, and wherein said second vibration-reducing positioning structure further includes a linked four-curve groove or slot in the diaphragm membrane that extends around all four of said curved protrusions or sets of protrusions extending from the diaphragm membrane. 
     
     
         30 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure includes a curved protrusion or set of protrusions extending from the pump head body and each said second vibration-reducing positioning structure includes an annular groove or perforated ring in the diaphragm membrane. 
     
     
         31 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 30 , wherein said first vibration-reducing positioning structure further includes a linked four-curve protrusion extending from the pump head body and around all four of said operating holes and corresponding curved protrusions or sets of protrusions, and wherein said second vibration-reducing positioning structure further includes a linked four-curve groove or slot in the diaphragm membrane that extends around all four of said annular grooves or perforated rings in the diaphragm membrane. 
     
     
         32 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a set of curved grooves or slots in the pump head body and each said second vibration-reducing positioning structure is a set of curved protrusions extending from the diaphragm membrane. 
     
     
         33 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a set of curved protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a set of curved grooves or slots in the diaphragm membrane. 
     
     
         34 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a set of round indents or holes in the pump head body and each said second vibration-reducing positioning structure is a set of round protrusions extending from the diaphragm membrane. 
     
     
         35 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a set of round protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a set of round indents or holes in the diaphragm membrane. 
     
     
         36 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a set of square indents or holes in the pump head body and each said second vibration-reducing positioning structure is a set of square protrusions extending from the diaphragm membrane. 
     
     
         37 . A four-compression-chamber diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a set of square protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a set of square indents or holes in the diaphragm membrane. 
     
     
         38 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said motor is a brushed motor. 
     
     
         39 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said motor is a brushless motor.