Anti-leakage device for a manual air pump with a pressure gauge

A manual air pump comprising:

• a cylinder defining a chamber therein;
• a piston rod including a handle mounted to a first end thereof and a piston mounted to a second end thereof, the piston being slidably received in the chamber of the cylinder;
• an adaptor including a horizontal section and a vertical section that is communicated with the horizontal section, the horizontal section of the adaptor being communicated with the chamber of the cylinder;
• a pressure gauge including a tubular plug on an end thereof, the vertical section of the adaptor being mounted around the tubular plug such that air in the chamber of the cylinder is flowable to the pressure gauge, the tubular plug including an outer threading and a conic end;
• a hose including a first end for inflation and a second end mounted around the conic end of the tubular plug of the pressure gauge such that air in the chamber of the cylinder is flowable to the first end of the hose for inflation;
• a hollow attaching member including an inner threading for engaging with the outer threading of the tubular plug, the hollow attaching member including an inner conic section with the second end of the hose being sandwiched between the conic section of the hollow attaching member and the conic end of the tubular plug for preventing leakage between the conic end of the tubular plug and the second end of the hose, wherein the cylinder includes a transverse slot defined in a lower end thereof;
• and
• a connector including a first end mounted in the transverse slot and communicated with the chamber of the cylinder, the connector further including a second end that communicates the first end of the connector with the first end of the adaptor.

A manual air pump comprising:

• a cylinder defining a chamber therein;
• a piston rod including a handle mounted to a first end thereof and a piston mounted to a second end thereof, the piston being slidably received in the chamber of the cylinder;
• an adaptor including a first end and a second end that is communicated with the first end of the adaptor, the first end of the adaptor being communicated with the chamber of the cylinder;
• a pressure gauge including a tubular plug formed thereon, the second end of the adaptor being mounted around the tubular plug such that air in the chamber of the cylinder is flowable to the pressure gauge via the second end of the adaptor;
• and
• a hose including a first end for inflation and a second end for sealingly receiving the tubular plug of the pressure gauge such that air in the chamber of the cylinder is flowable to the first end of the hose for inflation;
• the tubular plug including a first end that is adjacent to the pressure gauge and a second end that is conic and that is distal to the pressure gauge, the first end of the tubular plug including at least one O-ring mounted therearound to provide a sealing effect between the tubular plug and the second end of the adaptor.