×

Power supply control apparatus and method

  • US 20040230357A1
  • Filed: 04/08/2004
  • Published: 11/18/2004
  • Est. Priority Date: 05/12/2003
  • Status: Active Grant
First Claim
Patent Images

1. A pump (1) for fixing on a receptacle, the pump comprising:

  • a stationary portion including a pump body (16);

    a moving assembly (3) movable relative to the pump body (16) and co-operating therewith to define a pump chamber (17) of variable volume;

    at least one opening (24) in the pump body enabling the pump chamber to communicate with the inside of the receptacle and disposed in such a manner as to enable the pump to operate in the head-down position;

    an air intake passage between the stationary portion (2) and the moving assembly (3), said passage being distinct from said opening (24);

    a first lip (40) arranged, after displacement of the moving assembly from a rest position in the substance-dispensing direction, to press in leaktight manner against the pump body (16) and to prevent communication via said opening (24) between the inside of the receptacle and the pump chamber (17); and

    a second lip (41) situated above the first, when the pump is observed in the head-up position, said second lip being arranged, at least when the moving assembly is in an end-of-stroke position inside the pump body, to press in leaktight manner against the pump body and prevent communication via the inside of the pump body and said opening between the inside of the receptacle and the outside.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×