Hose nozzle with high pressure pump
OwnerT. Jack Gregoryinventor
Life of this patent
Estimating the term…
Abstract
A nozzle with self-contained high pressure booster pump is carried on a pistol grip handle with a small motor to drive the eccentrically-pump. A portion of the water from a conventional hose fitting flows laterally into a pump cylinder and then radially through the piston itself to exit axially through a check valve and into the pump chamber ahead of the piston. During the working stroke the water is driven out of the piston into a pressure chamber and then through a restricted passageway to exit in a jet stream. Another portion of the supply water is diverted around the pump cylinder to the same nozzle to flush away debris loosened by the jet stream.
Claims8
A hose nozzle with a high pressure booster pump comprising:
- a nozzle body;
- means forming an internal pump cylinder in said body;
- a supply line pressure flow passageway in said body radially outward of said pump cylinder;
- an inlet port opening into said flow passageway;
- a piston slidably mounted for reciprocation in said pump cylinder;
- seals around said piston at opposite ends thereof;
- a pump inlet duct communicating laterally between said line pressure flow passageway and said pump cylinder at a location therein intermediate and seals throughout reciprocation of said piston;
- a load duct extending radially into said piston from the outer surface thereof intermediate said seals;
- a load port in said piston communicating with said load duct and opening axially through the head of said piston;
- a one-way check valve in said load port enabling flow in one direction only from said load duct through the head of said piston;
- a nozzle outlet opening from said body;
- a restricted high pressure duct extending generally axially through said body from the head of said cylinder to said nozzle outlet;
- and
- means for reciprocating said piston.
Dependencies are inferred from the claim text.