Foam dispensing pump container
Patent 5443569 Issued on August 22, 1995. Estimated Expiration Date: 
March 3, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 3, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3527242 3709437 Foam production device Hand-operated applicator for media Precompression metering-proportioning pump enabling its efficiency to be improved by early admission into the pump working space Medium dispenser with mounting support for optional secondary dispensing unit Patent #: 5326000 InventorsAssigneeApplicationNo. 205172 filed on 03/03/1994US Classes:222/190, WITH MATERIAL TREATMENT OR CONDITIONING MEANS222/321.9, Pump casing within supply container222/384, With piston holding means417/550FlexibleExaminersPrimary: Kashnikow, AndresAssistant: Douglas, Lisa Ann Attorney, Agent or FirmForeign Patent References
International ClassB05B 007/00Foreign Application Priority Data1993-03-05 JPAbstractA foam dispensing pump container, for dispensing foam by mixing air pumped from an air cylinder by an air piston having suction holes in its upper wall and a foamable liquid pumped from a liquid cylinder by a liquid piston having an annular projection on its outer wall, provided with an elastic valve member including a cylindrical wall portion, an outer thin annular valve portion extending outwardly from the cylindrical wall portion, and an inner thin annular valve portion extending inwardly from the cylindrical wall portion. The elastic valve member is arranged such that the cylindrical wall portion is in contact at least partially with an inner surface of the upper wall between the suction holes and an air passage, the outer thin annular valve portion is in contact, at its outer annular rim portion, with an inner surface of the upper wall extending outwardly beyond the suction holes, and the inner thin annular valve portion is in contact, at its inner annular rim portion, with the annular projection of the liquid piston below the air passage.Field of SearchWITH MATERIAL TREATMENT OR CONDITIONING MEANSWith piston holding means Pump or pulsator casing within supply container Separable pump with holder mount or securing means Including additional dispersing plate or obstruction in mixing chamber Integral resilient member forms plural valves Flexible Annular | |
