Dispensing – With discharge assistant – Plural
Patent
1986-07-30
1991-03-19
Skaggs, H. Grant
Dispensing
With discharge assistant
Plural
222386, B67D 542
Patent
active
050003550
ABSTRACT:
A dispenser of the type having an elongated reservoir for storing toothpaste or other fluent material, an outlet nozzle at one end of the reservoir, and a one-way piston at the other end of the reservoir in contact with the fluent material, the one-way piston comprising a body portion having a top surface for contacting material in the reservoir, a flexible annular sealing member for sealingly engaging the inner wall of the reservoir, and one or more air-venting passages for permitting air trapped between the fluent material in the reservoir and the piston to be vented to the atmosphere as the piston is inserted into the dispenser and into contact with the material.
REFERENCES:
patent: Re31408 (1983-10-01), Czech et al.
patent: 1668511 (1928-05-01), McLaughlin
patent: 1757736 (1930-05-01), Pritchard
patent: 3088636 (1963-05-01), Spatz
patent: 3255935 (1966-06-01), Spatz
patent: 3268123 (1966-08-01), Spatz
patent: 3361305 (1968-01-01), Spatz
patent: 3674181 (1972-07-01), Marks et al.
patent: 3768705 (1973-10-01), Spatz
patent: 3870200 (1975-03-01), Spatz
patent: 4301948 (1981-11-01), Czech et al.
patent: 4394939 (1983-07-01), Thor et al.
patent: 4402431 (1983-09-01), Wiegner et al.
patent: 4413759 (1983-11-01), Mettenbrink
Beecham Inc.
Skaggs H. Grant
LandOfFree
Pump dispenser does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pump dispenser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump dispenser will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2003576