Abstract: An apparatus for constructing a high pressure fluid pump having a piston housing, a pump head connected to and supported by the piston housing, and a pump pedestal for supporting the pump head and the piston housing is provided. The pump head receives water at low pressure and, in combination with the piston housing, produces fluid through a flow channel at high pressure. The combination of piston housing and pump head contains a valve which, in response to a suction on one side of the valve, allows water at low pressure to pass through the valve into a receiving chamber, and, in response to a high pressure fluid in the receiving chamber, enables fluid at a high pressure to pass through the valve and eventually to an output port while closing off the input path. The pump can have an aluminum pump head structured to withstand high pressure fluid impact.

Abstract: A swivel nozzle mechanism used with a high pressure fluid washer attaches to an output wand, typically through a flexible hose, to direct a high pressure fluid from the washer to a directed target. The swivel nozzle mechanism attaches to a distal end of the wand and is controllable by a handle mechanism attached to the wand which enables the rotation of a spray nozzle about an axis, normal to the wand axis, at the distal end of the wand. The handle controls the direction of rotation of the spray nozzle and has a plurality of stable operating points resistant to movement and thereby providing for prolonged use at a fixed position.

Abstract: A swivel nozzle mechanism used with a high pressure fluid washer attaches to an output wand, typically through a flexible hose, to direct a high pressure fluid from the washer to a directed target. The swivel nozzle mechanism attaches to a distal end of the wand and is controllable by a handle mechanism attached to the wand which enables the rotation of a spray nozzle about an axis, normal to the wand axis, at the distal end of the wand. The handle controls the direction of rotation of the spray nozzle and has a plurality of stable operating points resistant to movement and thereby providing for prolonged use at a fixed position.