| 摘要 |
PCT No. PCT/GB94/02528 Sec. 371 Date Aug. 7, 1995 Sec. 102(e) Date Aug. 7, 1995 PCT Filed Nov. 17, 1994 PCT Pub. No. WO95/13737 PCT Pub. Date May 26, 1995Cleaning or sweeping apparatus for example of the pedestrian type, has a suspension and preferably means for biasing the brush or brushes against the surface to be cleaned or swept, at a desired value and preferably at a controllably variable value. Long springs mounted in spring tubes which are compressed by an electrical actuator are the preferred option. Working pressures are measured and displayed on an operator's console and may be kept fairly constant despite uneven floors by a feedback control circuit. An operator may input a desired pressure and feedback can be used to tailor the working pressure to the chosen pressure input. An electronic control circuit included a microprocessor is described. With a controllable brush pressure the cleaning or sweeping machine is more adaptable, can be used for both heavy duty cleaning or scrubbing tasks and light sweeping tasks without the need to for resetting the machine in the factory and without wearing out the expensive brushes or damaging the floor surface.
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