Hydropneumatic washing device

A washing device having hydropneumatic action involving compression of a volume of air and water, with the air and water being expelled from the washing device under pressure, said washing device comprising:

• an outer housing having an upper and a lower end and defining an interior, said outer housing having an upper surface substantially covering the upper end thereof and an opening in the lower end thereof;
• an inner housing positioned at least partially in the interior of the outer housing and having a passageway extending longitudinally therethrough, with an upper end of the inner housing being positioned inside the interior of the outer housing and a lower end of the inner housing extending through the opening in the lower end of the outer housing, said inner and outer housings being slidable relative to one another;
• a spring positioned in the interior of the outer housing between the upper end of the inner housing and the upper surface of the outer housing, the spring being substantially resilient;
• wherein the outer housing includes a shoulder positioned at the lower end thereof, said shoulder extending inwardly from an outer wall of the outer housing and defining, at an inner edge of the shoulder, the opening in the lower end of the outer housing, said shoulder providing sliding contact against the inner housing.

The method for performing washing comprising:

• providing an outer housing with an upper surface substantially covering the upper end thereof, an opening provided at the lower end thereof and having a lateral dimension W1 transverse to a longitudinal axis of said outer housing, and an interior;
• providing an inner housing having an upper end and a lower end, with a passageway extending through the interior thereof from the upper end to the lower end, said upper end of said inner housing being positioned inside the interior of the outer housing, and the lower end of the inner housing extending outside the outer housing through the opening in the lower end of the outer housing;
• providing a flange on the inner housing, said flange having a lateral dimension W2 transverse to said longitudinal axis, wherein W1>W2;
• and
• providing a spring in the interior of the outer housing, said spring being positioned between the flange and the upper surface of the outer housing, wherein said spring is resilient;
• providing a plurality of orifices along the lower end of the outer housing to allow fluid to exit the interior of the outer housing;
• positioning the lower end of the inner housing in a source of water and air;
• and
• sliding the outer housing relative to the inner housing against a force of the spring to suction up air and water from the source of water and air and expel a jet of water and air through the orifices provided along the lower end of the outer housing to perform washing.