Fluid discharge pumping apparatus

Details Fluid discharge pumping apparatus Fluid discharge pumping apparatus

2008-06-17

2008-06-17

Jacyna, J. Casimer (Department: 3754)

Dispensing

With discharge assistant

Motor operated

C222S309000, C141S116000, C417S559000, C417S566000, C417S571000

Reexamination Certificate

active

07387221

ABSTRACT:
A fluid discharge pumping apparatus includes: a drive mechanism; a cylinder; an outflow valve mechanism and an inflow valve mechanism coupled to the cylinder; a piston member inside the cylinder; and a piston-supporting member attached to the piston member driven by the drive mechanism to move the piston member. The inflow valve mechanism opens when the interior of the cylinder is depressurized, whereas the outflow valve mechanism opens when the interior of the cylinder is pressurized.

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patent: 5769136 (1998-06-01), Kanematsu et al.
patent: 5865226 (1999-02-01), Sweeney
patent: 2 732 315 (1996-10-01), None
patent: 2003-061560 (2003-03-01), None
patent: WO 00/32932 (2000-06-01), None

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