| 摘要 |
A power washer wand has a configuration which balances the forces of the water stream. By balancing these forces, the back pressure is greatly reduced. This results in less fatigue for the user and also enables the wand to be extended in order to reach high or distant surfaces without the use of a ladder or scaffold. The wand includes an angle changing coupling such as a swivel joint which allows the angle between the configuration that balances the forces ("force balancing configuration") and the surface being washed to remain substantially constant. The angle changing coupling is preferably located at the proximal end of the force balancing configuration. In one version, the force balancing configuration is a loop or helix having a the first bend replaced with an angle changing coupling or a right angle fitting. In a second version, the force balancing configuration is a two-tined, fork-shaped divergent configuration which reconverges at a distal coupling, such as a "Y" coupling. An angle changing coupling is located at a proximal end to the divergent configuration. The wand may be longer than conventional wands and may be connected to an extension.
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