Dispensing – With discharge assistant – With discharge volume varying means
Patent
1994-02-08
1995-11-21
Shaver, Kevin P.
Dispensing
With discharge assistant
With discharge volume varying means
222334, 222340, 222380, 222504, B67D 546, G01F 1106
Patent
active
054678994
ABSTRACT:
A device which positively dispenses small, accurately measured, amounts of a flowable material, such as a resin, epoxy, etc. A pair of reciprocal pistons are movably mounted, each in a respective fluid pressure chamber, formed in a main body of a housing. One of the pistons moves a material dispense rod within a first section of a bore formed in a tubular portion of the housing. The second piston moves a sleeve which is telescopically mounted on the tubular housing between a material load position wherein flowable material is admitted into the first bore section, and a material discharge position wherein the first bore section is in communication with the second bore section. The dispense rod is moved into the first bore section to positively displace a predetermined amount of material from the device by movement of this same amount of material from the first bore section into the second bore section through a communication channel formed in the sleeve, thereby dispensing the same amount of material from a material outlet opening of the second bore section with each stroke of the dispense rod.
REFERENCES:
patent: 3162336 (1964-12-01), Erickson
patent: 4030640 (1977-06-01), Citrin et al.
patent: 4095722 (1978-06-01), Miller
patent: 4293010 (1981-10-01), Winiasz
patent: 4381099 (1983-04-01), Knedlik
patent: 4974754 (1990-12-01), Wirz
patent: 5092492 (1992-03-01), Centea
patent: 5148946 (1992-09-01), Mizuta et al.
patent: 5207352 (1993-05-01), Porter et al.
Brochure: SCM/Dispensit, "SCM/Dispensit's On/Off Function", 1990.
Liquid Control Corporation
Shaver Kevin P.
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