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Cleaning machine and control switch therefor

  • US 5,455,984 A
  • Filed: 09/01/1993
  • Issued: 10/10/1995
  • Est. Priority Date: 09/01/1993
  • Status: Expired due to Term
First Claim
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1. A floor cleaning appliance comprising:

  • a housing;

    a source of suction in the housing;

    a receptacle in the housing for receiving collected dirt and dust;

    a power foot having a suction nozzle;

    a conduit extending between the housing and the suction nozzle, the conduit comprising a flexible hose having two ends and a rigid wand having first and second ends, one end of the hose being mounted to the source of suction in the housing, the first end of the wand being mounted to the power foot and the second end of the wand being selectively mounted to another end of the flexible hose;

    an agitation member mounted in the power foot and adapted to agitate a surface to be cleaned;

    an agitation member motor mounted in the power foot, interconnected to said agitation member and adapted to impart an agitation force to the agitation member;

    an electrical circuit between the agitation motor and the housing, said electrical circuit including a connector between said flexible hose and said rigid wand and a normally open agitation motor pneumatic switch adapted to switch between open and closed positions in response to changes in fluid pressure applied to the switch, the closed position corresponding to a closed electrical circuit between the agitation member motor and the housing and the open position corresponding to an open electrical circuit between the agitation member motor and the housing;

    a manual pressure controller mounted to the flexible hose and connected to the agitation motor pneumatic switch for selectively applying pneumatic pressure to the agitation motor pneumatic switch to close the same, the pressure controller having an opening which, when open, renders the pressure controller ineffective for actuating the agitation motor pneumatic switch; and

    a closure member mounted on the rigid wand and connected to the manual pressure controller opening for closing the controller when the rigid wand is properly mounted to the flexible hose to thereby render said manual pressure controller operable to supply pneumatic pressure to said agitation motor pneumatic switch when said flexible hose and said rigid wand are properly connected together and to render said manual pressure controller inoperable to supply pneumatic pressure to said agitation motor pneumatic switch when said flexible hose and said rigid wand are disconnected from each other;

    whereby, electrical energy can normally be supplied to said connector only when said rigid wand is connected to said flexible hose.

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