초록 ▼

An improved dispenser for fluent masses such as toothpaste, lotions, chemicals and the like, includes a body member having a chamber which receives a collapsible and flexible pouch. Associated with the body member is a pumping chamber preferably comprised of a lower and upper housing. The pump chamb

An improved dispenser for fluent masses such as toothpaste, lotions, chemicals and the like, includes a body member having a chamber which receives a collapsible and flexible pouch. Associated with the body member is a pumping chamber preferably comprised of a lower and upper housing. The pump chamber, pouch and discharge aperture of the dispenser are at essentially ambient atmospheric pressure, and there is provided a check valve mechanism which sequentially permits flow of material from the pouch into the pump chamber as material is discharged from the discharge spout. The discharge spout is configured and arranged to inhibit flow of air through the discharge spout back into the pump chamber. Various structures and arrangements are described.

대표청구항 ▼

A pump type dispenser for fluent material comprising: a container having a pump chamber and a body member, said body member including an interior wall portion forming a body chamber, a flexible and collapsible pouch supported within said body chamber with at least portions thereof spaced from the in

A pump type dispenser for fluent material comprising: a container having a pump chamber and a body member, said body member including an interior wall portion forming a body chamber, a flexible and collapsible pouch supported within said body chamber with at least portions thereof spaced from the interior wall portion of said body member to form an air gap therebetween, said air gap being essentially at ambient pressure, said pouch containing the material to be dispensed, said pump chamber including a discharge spout and being essentially filled with material to be dispensed, means cooperating with said pump chamber to form a pump operative to discharge at least a portion of the material in said pump chamber through said discharge spout and to effect flow of material from said pouch into said pump chamber to replace the material which has been discharged, said pouch being at essentially ambient pressure and essentially free of compressible gas whereby ambient air pressure in said gap is operative to cause material in said pouch to flow into said pump chamber during operation of said pump, means cooperating with said pump chamber and said pouch to permit flow of material from said pouch to said pump chamber when said pump is actuated while preventing flow of material from said pump chamber into said pouch, means to prevent air from passing through said spout into the material located within said pump chamber as material flows from said pouch into said pump chamber, means to permit flow of ambient air into said air gap whereby said air gap is maintained at ambient air pressure, said pump chamber including spaced housing members forming a chamber of variable volume, said pump being operative in one position to reduce the volume of said pump chamber and in another position to effect flow of material from said pouch to said pump chamber to replace the material dispensed, said housing members including an upper and lower housing member, said upper housing member being supported by said body member and said lower housing member being assembled to and supported by said upper housing member, and said pouch including a portion received between said housing members and being sealingly supported thereby.