Portable pressure washer

A portable pressure washer comprising:

• engine means having an output shaft and being capable of operation over a range of speeds, the engine means being of such size and weight as to be carried in the hand of a user;
• housing means for the engine means including handle means for carrying and manipulating the portable pressure washer during operative functions, the handle means being disposed on the top of said housing means;
• manually operable engine control means associated with said handle means for controlling the speed of said engine means;
• rotatable clutch means comprising drive and driven portions, the drive portion being operably connected to the output shaft of the engine means, the rotatable clutch means further comprising means for causing clutchable engagement between the drive and driven portions at a predetermined rotational speed;
• positive displacement rotatable pump means operably connected to the driven portion of the rotatable clutch means and having an inlet adapted for connection to a source of liquid and an outlet, the rotatable pump means comprising pump housing means defining a cylindrical pump chamber with an inner cylindrical surface, a rotatable shaft operably connected to the driven portion of the rotatable clutch means, a rotor rotatably mounted on the rotatable shaft and disposed within said cylindrical pump chamber, and a plurality of vanes carried by the rotor in sliding engagement with the inner cylindrical surface of the pump chamber;
• and
• spray wand means comprising a substantial rigid outlet tube having first and second ends, the first end being substantially rigidly connected to the outlet of the pump means, and spray head means connected to the second end of the outlet tube;
• the entirety of said portable pressure washer being carried by, maneuvered and operated with said handle means and the associated engine control means over a range of engine speeds to operate said pressure washer and controllably direct the spray emanating from spray head means.