Mechanical suction device

A mechanical suction device comprising:

• a housing having
• a front;
• a top;
• a bottom;
• a side;
• multiple top recesses defined in the top of the housing, arranged in multiple longitudinal rows and simultaneously in transverse rows, and each top recess having a bottom surface and an air inlet defined in the bottom surface of the top recess;
• multiple bottom recesses defined in the bottom of the housing and corresponding to the top recesses, and each bottom recess having a top surface;
• multiple medial passages corresponding to the top and bottom recesses, defined inside the housing and communicating with and mounted between the corresponding top and bottom recesses;
• multiple longitudinal air passages defined longitudinally through the housing between the longitudinal rows of the top and bottom recesses;
• multiple transverse ports defined transversely through the housing, corresponding to and located respectively between the transverse rows of the top and bottom recesses, and each transverse port crisscrossing and communicating with the longitudinal air passages, formed below and communicating respectively with the air inlets in the top recesses in one of the corresponding transverse rows and having an inner diameter;
• and
• multiple longitudinal inlet tubes mounted on the front of the housing and corresponding respectively to the longitudinal air passages, and each longitudinal inlet tube having
• an open proximal end mounted through the front of the housing and communicating with and attached to a corresponding one of the longitudinal air passages;
• an open distal end;
• and
• a through hole defined longitudinally through the longitudinal inlet tube between the open proximal and distal ends;
• multiple pneumatic cylinder assemblies mounted on the left side of the housing and corresponding respectively to the transverse ports, and each pneumatic cylinder assembly having
• a cylinder mounted on the side of the housing and having
• an open proximal end mounted on the side of the housing and communicating with a corresponding one of the transverse ports;
• a distal end;
• an inner chamber communicating with the open proximal end of the cylinder;
• and
• a port defined through the distal end of the cylinder and communicating with the inner chamber;
• a transverse inlet tube attached to the distal end of the cylinder and having
• an open proximal end mounted through the port at the distal end of the cylinder and communicating with the inner chamber;
• an open distal end;
• and
• a through hole defined from the open distal end of the transverse inlet tube to the open proximal end of the transverse inlet tube;
• a shaft valve mounted slidably in a corresponding one of the transverse ports and having
• an inner end;
• an outer end;
• multiple stems formed on the shaft valve at intervals, and each stem having an outer diameter;
• and
• multiple annular valve disks formed respectively between adjacent stems and corresponding to and aligned respectively with the air inlets in the top recesses in the corresponding transverse row, and each annular valve disk having two ends and an outer diameter larger than the outer diameter of the stem;
• a piston attached to the outer end of the shaft valve, mounted slidably inside the inner chamber and having an inside end and an outside end;
• and
• a spring mounted around the shaft valve inside the cylinder and having two ends respectively abutting the side of the housing and the distal end of the cylinder;
• multiple air piston assemblies corresponding to the top and bottom recesses and mounted in the housing, and each air piston assembly having
• an air piston mounted slidably in a corresponding one of the top recesses and having
• a bottom;
• a through hole;
• an inner surface;
• and
• an annular inner rib formed on the inner surface of the air piston and having a top surface and a bottom surface;
• a shaft mounted slidably in the bottom recess through the medial passage, extending into the through hole of the air piston and having
• a sidewall;
• a top end abutting the bottom surface of the annular inner rib in the air piston;
• a bottom end;
• an air-suction passage defined in the top end of the shaft and communicating with the through hole of the air piston;
• an inner thread formed on the inner surface inside the air-suction passage in the shaft;
• a side hole defined through the sidewall and communicating with the air-suction passage in the shaft;
• and
• an annular flange formed around the sidewall between the side hole and the top end of the shaft and having a top surface and a bottom surface;
• a spring mounted around the shaft and having two ends respectively abutting the top surface of the bottom recess and the top surface of the annular flange on the shaft;
• and
• a bolt mounted inside the through hole in the air piston on the top end of the shaft and having
• a top end;
• a head formed on the top end of the bolt and abutting the top surface of the annular inner rib of the air piston;
• an outer surface;
• an outer thread formed on the outer surface of the bolt and screwing into the inner thread in the shaft;
• and
• an air hole defined through the bolt and communicating the air-suction passage in the shaft;
• and
• a base mounted on the bottom of the housing and has multiple through holes corresponding respectively to the shafts and respectively allowing the bottom ends of the shafts to extend into the through holes to close the through holes.