Manual pump

Abstract

A manual pump which has a plunger and a cylinder. The cylinder defines a nozzle through a first end and an opening through a second end. A groove is circumferentially defined in an internal surface of the cylinder near the opening. Two slots are defined in a stem. The plunger has a stem and a piston which is formed at the first end of the stem. A knob is formed at the second end of the stem. The piston has first and second disks spaced from each other. A plurality of holes are defined through the first disk of the piston. A sealing ring is mounted between the first and second disks of the piston. An annular limit consists of two semi-annular halves between which the stem is inserted. Each semi-annular half has a semi-annular flange formed thereon in order to be engaged in the groove defined in the cylinder so that the annular limit is attached in the cylinder so as to retain the piston in the cylinder. A tab projects from the underside of each semi-annular half of the annular limit.

Dependencies are inferred from the claim text.